/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/nonblocking-cntr-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-770125f [2021-05-21 21:10:19,719 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-21 21:10:19,721 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-21 21:10:19,753 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-21 21:10:19,754 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-21 21:10:19,754 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-21 21:10:19,755 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-21 21:10:19,763 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-21 21:10:19,765 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-21 21:10:19,769 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-21 21:10:19,770 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-21 21:10:19,771 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-21 21:10:19,771 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-21 21:10:19,772 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-21 21:10:19,773 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-21 21:10:19,774 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-21 21:10:19,776 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-21 21:10:19,777 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-21 21:10:19,779 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-21 21:10:19,780 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-21 21:10:19,781 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-21 21:10:19,782 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-21 21:10:19,783 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-21 21:10:19,784 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-21 21:10:19,789 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-21 21:10:19,790 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-21 21:10:19,790 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-21 21:10:19,791 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-21 21:10:19,791 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-21 21:10:19,791 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-21 21:10:19,792 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-21 21:10:19,792 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-21 21:10:19,793 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-21 21:10:19,793 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-21 21:10:19,794 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-21 21:10:19,794 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-21 21:10:19,794 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-21 21:10:19,795 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-21 21:10:19,795 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-21 21:10:19,795 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-21 21:10:19,795 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-21 21:10:19,798 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 [2021-05-21 21:10:19,819 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-21 21:10:19,819 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-21 21:10:19,820 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-21 21:10:19,820 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-21 21:10:19,821 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-21 21:10:19,822 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-21 21:10:19,822 INFO L138 SettingsManager]: * Use SBE=true [2021-05-21 21:10:19,822 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-21 21:10:19,822 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-21 21:10:19,822 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-21 21:10:19,822 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-21 21:10:19,823 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-21 21:10:19,823 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-21 21:10:19,823 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-21 21:10:19,823 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-21 21:10:19,823 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-21 21:10:19,823 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-21 21:10:19,823 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-21 21:10:19,823 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-21 21:10:19,823 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-21 21:10:19,823 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-21 21:10:19,823 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-21 21:10:19,823 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-21 21:10:19,824 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-21 21:10:19,824 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-21 21:10:19,824 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-21 21:10:19,824 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-21 21:10:19,824 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-21 21:10:19,824 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-21 21:10:19,824 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-21 21:10:19,824 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-21 21:10:19,824 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-21 21:10:20,044 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-21 21:10:20,057 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-21 21:10:20,059 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-21 21:10:20,060 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-21 21:10:20,061 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-21 21:10:20,061 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/nonblocking-cntr-alt.wvr.bpl [2021-05-21 21:10:20,073 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/nonblocking-cntr-alt.wvr.bpl' [2021-05-21 21:10:20,102 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-21 21:10:20,103 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-21 21:10:20,109 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-21 21:10:20,109 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-21 21:10:20,109 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-21 21:10:20,117 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:10:20" (1/1) ... [2021-05-21 21:10:20,121 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:10:20" (1/1) ... [2021-05-21 21:10:20,125 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-21 21:10:20,127 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-21 21:10:20,127 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-21 21:10:20,128 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-21 21:10:20,132 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:10:20" (1/1) ... [2021-05-21 21:10:20,132 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:10:20" (1/1) ... [2021-05-21 21:10:20,133 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:10:20" (1/1) ... [2021-05-21 21:10:20,133 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:10:20" (1/1) ... [2021-05-21 21:10:20,135 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:10:20" (1/1) ... [2021-05-21 21:10:20,137 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:10:20" (1/1) ... [2021-05-21 21:10:20,138 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:10:20" (1/1) ... [2021-05-21 21:10:20,138 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-21 21:10:20,139 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-21 21:10:20,139 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-21 21:10:20,140 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-21 21:10:20,142 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:10:20" (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 [2021-05-21 21:10:20,185 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-21 21:10:20,185 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-21 21:10:20,185 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-21 21:10:20,185 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-21 21:10:20,185 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-21 21:10:20,185 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-21 21:10:20,185 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-21 21:10:20,186 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-21 21:10:20,186 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-21 21:10:20,186 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-21 21:10:20,336 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-21 21:10:20,337 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-21 21:10:20,339 INFO L202 PluginConnector]: Adding new model nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 09:10:20 BoogieIcfgContainer [2021-05-21 21:10:20,339 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-21 21:10:20,340 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-21 21:10:20,340 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-21 21:10:20,342 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-21 21:10:20,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:10:20" (1/2) ... [2021-05-21 21:10:20,343 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ca710e1 and model type nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.05 09:10:20, skipping insertion in model container [2021-05-21 21:10:20,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 09:10:20" (2/2) ... [2021-05-21 21:10:20,344 INFO L111 eAbstractionObserver]: Analyzing ICFG nonblocking-cntr-alt.wvr.bpl [2021-05-21 21:10:20,347 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-21 21:10:20,347 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-21 21:10:20,347 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-05-21 21:10:20,348 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-21 21:10:20,364 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-05-21 21:10:20,377 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-05-21 21:10:20,390 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-21 21:10:20,390 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-21 21:10:20,390 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-21 21:10:20,390 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-21 21:10:20,390 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-21 21:10:20,390 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-21 21:10:20,390 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-21 21:10:20,390 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-21 21:10:20,396 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 23 transitions, 62 flow [2021-05-21 21:10:20,403 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 34 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) [2021-05-21 21:10:20,404 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 34 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) [2021-05-21 21:10:20,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-21 21:10:20,408 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:10:20,409 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:10:20,409 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:10:20,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:10:20,437 INFO L82 PathProgramCache]: Analyzing trace with hash 754791855, now seen corresponding path program 1 times [2021-05-21 21:10:20,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:10:20,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740166681] [2021-05-21 21:10:20,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:10:20,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:10:20,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:20,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:10:20,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740166681] [2021-05-21 21:10:20,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740166681] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:10:20,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:10:20,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-21 21:10:20,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690055899] [2021-05-21 21:10:20,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-21 21:10:20,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:10:20,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-21 21:10:20,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-21 21:10:20,612 INFO L87 Difference]: Start difference. First operand has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 34 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) Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:20,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:10:20,652 INFO L93 Difference]: Finished difference Result 43 states and 77 transitions. [2021-05-21 21:10:20,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 21:10:20,654 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-21 21:10:20,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:10:20,660 INFO L225 Difference]: With dead ends: 43 [2021-05-21 21:10:20,660 INFO L226 Difference]: Without dead ends: 43 [2021-05-21 21:10:20,661 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-21 21:10:20,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-21 21:10:20,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2021-05-21 21:10:20,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 37 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:20,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 67 transitions. [2021-05-21 21:10:20,692 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 67 transitions. Word has length 15 [2021-05-21 21:10:20,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:10:20,692 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 67 transitions. [2021-05-21 21:10:20,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:20,692 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 67 transitions. [2021-05-21 21:10:20,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-21 21:10:20,693 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:10:20,694 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:10:20,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-21 21:10:20,694 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:10:20,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:10:20,699 INFO L82 PathProgramCache]: Analyzing trace with hash 759896365, now seen corresponding path program 1 times [2021-05-21 21:10:20,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:10:20,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895986659] [2021-05-21 21:10:20,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:10:20,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:10:20,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:10:20,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:10:20,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895986659] [2021-05-21 21:10:20,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895986659] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:10:20,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:10:20,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-21 21:10:20,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667827917] [2021-05-21 21:10:20,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-21 21:10:20,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:10:20,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-21 21:10:20,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-21 21:10:20,733 INFO L87 Difference]: Start difference. First operand 38 states and 67 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:20,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:10:20,747 INFO L93 Difference]: Finished difference Result 50 states and 91 transitions. [2021-05-21 21:10:20,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 21:10:20,747 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-21 21:10:20,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:10:20,748 INFO L225 Difference]: With dead ends: 50 [2021-05-21 21:10:20,748 INFO L226 Difference]: Without dead ends: 50 [2021-05-21 21:10:20,749 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-21 21:10:20,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-21 21:10:20,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2021-05-21 21:10:20,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 43 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:20,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 79 transitions. [2021-05-21 21:10:20,752 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 79 transitions. Word has length 17 [2021-05-21 21:10:20,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:10:20,753 INFO L482 AbstractCegarLoop]: Abstraction has 44 states and 79 transitions. [2021-05-21 21:10:20,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:20,753 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 79 transitions. [2021-05-21 21:10:20,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 21:10:20,753 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:10:20,753 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:10:20,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-21 21:10:20,754 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:10:20,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:10:20,754 INFO L82 PathProgramCache]: Analyzing trace with hash -806719381, now seen corresponding path program 1 times [2021-05-21 21:10:20,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:10:20,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54476203] [2021-05-21 21:10:20,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:10:20,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:10:20,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:20,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:10:20,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54476203] [2021-05-21 21:10:20,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54476203] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:20,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059379469] [2021-05-21 21:10:20,944 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 [2021-05-21 21:10:20,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:10:20,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 21:10:20,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:10:21,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:21,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059379469] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:21,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:10:21,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-21 21:10:21,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848299905] [2021-05-21 21:10:21,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 21:10:21,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:10:21,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 21:10:21,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-05-21 21:10:21,242 INFO L87 Difference]: Start difference. First operand 44 states and 79 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:21,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:10:21,391 INFO L93 Difference]: Finished difference Result 108 states and 201 transitions. [2021-05-21 21:10:21,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 21:10:21,392 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-21 21:10:21,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:10:21,396 INFO L225 Difference]: With dead ends: 108 [2021-05-21 21:10:21,399 INFO L226 Difference]: Without dead ends: 77 [2021-05-21 21:10:21,400 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 246.9ms TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-05-21 21:10:21,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-21 21:10:21,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2021-05-21 21:10:21,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.8867924528301887) internal successors, (100), 53 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:21,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 100 transitions. [2021-05-21 21:10:21,411 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 100 transitions. Word has length 19 [2021-05-21 21:10:21,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:10:21,412 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 100 transitions. [2021-05-21 21:10:21,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:21,412 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 100 transitions. [2021-05-21 21:10:21,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 21:10:21,413 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:10:21,413 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:10:21,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-21 21:10:21,628 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:10:21,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:10:21,629 INFO L82 PathProgramCache]: Analyzing trace with hash 242654451, now seen corresponding path program 2 times [2021-05-21 21:10:21,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:10:21,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625490299] [2021-05-21 21:10:21,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:10:21,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:10:21,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:21,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:10:21,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625490299] [2021-05-21 21:10:21,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625490299] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:21,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534361422] [2021-05-21 21:10:21,805 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 [2021-05-21 21:10:21,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:10:21,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:10:21,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 21:10:21,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:10:22,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:22,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534361422] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:22,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:10:22,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-21 21:10:22,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864667940] [2021-05-21 21:10:22,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 21:10:22,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:10:22,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 21:10:22,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-05-21 21:10:22,053 INFO L87 Difference]: Start difference. First operand 54 states and 100 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:22,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:10:22,319 INFO L93 Difference]: Finished difference Result 130 states and 236 transitions. [2021-05-21 21:10:22,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 21:10:22,319 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-21 21:10:22,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:10:22,321 INFO L225 Difference]: With dead ends: 130 [2021-05-21 21:10:22,321 INFO L226 Difference]: Without dead ends: 117 [2021-05-21 21:10:22,322 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 325.3ms TimeCoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2021-05-21 21:10:22,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-05-21 21:10:22,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 57. [2021-05-21 21:10:22,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.9285714285714286) internal successors, (108), 56 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:22,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 108 transitions. [2021-05-21 21:10:22,333 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 108 transitions. Word has length 19 [2021-05-21 21:10:22,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:10:22,334 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 108 transitions. [2021-05-21 21:10:22,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:22,334 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 108 transitions. [2021-05-21 21:10:22,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 21:10:22,335 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:10:22,335 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:10:22,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:10:22,541 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:10:22,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:10:22,541 INFO L82 PathProgramCache]: Analyzing trace with hash 892723421, now seen corresponding path program 3 times [2021-05-21 21:10:22,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:10:22,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510635652] [2021-05-21 21:10:22,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:10:22,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:10:22,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:22,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:10:22,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510635652] [2021-05-21 21:10:22,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510635652] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:22,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364873127] [2021-05-21 21:10:22,692 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 [2021-05-21 21:10:22,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 21:10:22,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:10:22,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 21:10:22,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:10:22,871 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:22,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364873127] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:22,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:10:22,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-21 21:10:22,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624212934] [2021-05-21 21:10:22,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 21:10:22,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:10:22,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 21:10:22,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-05-21 21:10:22,873 INFO L87 Difference]: Start difference. First operand 57 states and 108 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:23,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:10:23,059 INFO L93 Difference]: Finished difference Result 90 states and 168 transitions. [2021-05-21 21:10:23,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 21:10:23,059 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-21 21:10:23,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:10:23,060 INFO L225 Difference]: With dead ends: 90 [2021-05-21 21:10:23,060 INFO L226 Difference]: Without dead ends: 83 [2021-05-21 21:10:23,060 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 248.0ms TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-05-21 21:10:23,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-05-21 21:10:23,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 55. [2021-05-21 21:10:23,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.9074074074074074) internal successors, (103), 54 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:23,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 103 transitions. [2021-05-21 21:10:23,063 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 103 transitions. Word has length 19 [2021-05-21 21:10:23,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:10:23,063 INFO L482 AbstractCegarLoop]: Abstraction has 55 states and 103 transitions. [2021-05-21 21:10:23,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:23,063 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 103 transitions. [2021-05-21 21:10:23,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 21:10:23,064 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:10:23,064 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:10:23,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:10:23,282 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:10:23,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:10:23,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1736336617, now seen corresponding path program 4 times [2021-05-21 21:10:23,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:10:23,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976044888] [2021-05-21 21:10:23,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:10:23,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:10:23,477 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:23,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:10:23,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976044888] [2021-05-21 21:10:23,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976044888] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:23,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753681684] [2021-05-21 21:10:23,478 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:10:23,501 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:10:23,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:10:23,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-21 21:10:23,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:10:23,725 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:23,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753681684] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:23,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:10:23,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-21 21:10:23,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356187676] [2021-05-21 21:10:23,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 21:10:23,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:10:23,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 21:10:23,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-05-21 21:10:23,726 INFO L87 Difference]: Start difference. First operand 55 states and 103 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:24,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:10:24,024 INFO L93 Difference]: Finished difference Result 117 states and 220 transitions. [2021-05-21 21:10:24,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 21:10:24,024 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 21:10:24,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:10:24,025 INFO L225 Difference]: With dead ends: 117 [2021-05-21 21:10:24,025 INFO L226 Difference]: Without dead ends: 103 [2021-05-21 21:10:24,025 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 417.2ms TimeCoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2021-05-21 21:10:24,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-05-21 21:10:24,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 72. [2021-05-21 21:10:24,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.943661971830986) internal successors, (138), 71 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:24,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 138 transitions. [2021-05-21 21:10:24,028 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 138 transitions. Word has length 21 [2021-05-21 21:10:24,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:10:24,028 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 138 transitions. [2021-05-21 21:10:24,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:24,028 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 138 transitions. [2021-05-21 21:10:24,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 21:10:24,029 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:10:24,029 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:10:24,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:10:24,241 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:10:24,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:10:24,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1509256847, now seen corresponding path program 5 times [2021-05-21 21:10:24,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:10:24,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65625837] [2021-05-21 21:10:24,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:10:24,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:10:24,421 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:24,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:10:24,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65625837] [2021-05-21 21:10:24,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65625837] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:24,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873381896] [2021-05-21 21:10:24,421 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 [2021-05-21 21:10:24,441 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 21:10:24,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:10:24,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-21 21:10:24,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:10:24,686 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:24,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873381896] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:24,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:10:24,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-21 21:10:24,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576743286] [2021-05-21 21:10:24,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 21:10:24,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:10:24,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 21:10:24,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-05-21 21:10:24,688 INFO L87 Difference]: Start difference. First operand 72 states and 138 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:25,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:10:25,032 INFO L93 Difference]: Finished difference Result 133 states and 248 transitions. [2021-05-21 21:10:25,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 21:10:25,032 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 21:10:25,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:10:25,033 INFO L225 Difference]: With dead ends: 133 [2021-05-21 21:10:25,033 INFO L226 Difference]: Without dead ends: 126 [2021-05-21 21:10:25,034 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 447.7ms TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2021-05-21 21:10:25,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-05-21 21:10:25,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 73. [2021-05-21 21:10:25,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.9722222222222223) internal successors, (142), 72 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:25,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 142 transitions. [2021-05-21 21:10:25,044 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 142 transitions. Word has length 21 [2021-05-21 21:10:25,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:10:25,045 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 142 transitions. [2021-05-21 21:10:25,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:25,045 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 142 transitions. [2021-05-21 21:10:25,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 21:10:25,045 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:10:25,046 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:10:25,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-21 21:10:25,250 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:10:25,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:10:25,250 INFO L82 PathProgramCache]: Analyzing trace with hash -859187877, now seen corresponding path program 6 times [2021-05-21 21:10:25,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:10:25,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108505496] [2021-05-21 21:10:25,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:10:25,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:10:25,414 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:25,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:10:25,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108505496] [2021-05-21 21:10:25,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108505496] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:25,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114981716] [2021-05-21 21:10:25,414 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 [2021-05-21 21:10:25,434 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 21:10:25,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:10:25,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-21 21:10:25,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:10:25,646 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:25,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114981716] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:25,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:10:25,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-21 21:10:25,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094829811] [2021-05-21 21:10:25,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 21:10:25,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:10:25,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 21:10:25,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-05-21 21:10:25,648 INFO L87 Difference]: Start difference. First operand 73 states and 142 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:26,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:10:26,014 INFO L93 Difference]: Finished difference Result 113 states and 215 transitions. [2021-05-21 21:10:26,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 21:10:26,014 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 21:10:26,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:10:26,015 INFO L225 Difference]: With dead ends: 113 [2021-05-21 21:10:26,015 INFO L226 Difference]: Without dead ends: 106 [2021-05-21 21:10:26,015 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 434.7ms TimeCoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2021-05-21 21:10:26,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-05-21 21:10:26,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 72. [2021-05-21 21:10:26,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.943661971830986) internal successors, (138), 71 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:26,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 138 transitions. [2021-05-21 21:10:26,021 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 138 transitions. Word has length 21 [2021-05-21 21:10:26,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:10:26,021 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 138 transitions. [2021-05-21 21:10:26,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:26,021 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 138 transitions. [2021-05-21 21:10:26,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 21:10:26,022 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:10:26,022 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:10:26,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:10:26,225 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:10:26,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:10:26,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1888068795, now seen corresponding path program 7 times [2021-05-21 21:10:26,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:10:26,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584894901] [2021-05-21 21:10:26,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:10:26,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:10:26,325 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:26,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:10:26,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584894901] [2021-05-21 21:10:26,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584894901] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:26,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850202711] [2021-05-21 21:10:26,326 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 [2021-05-21 21:10:26,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:10:26,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-21 21:10:26,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:10:26,547 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:26,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850202711] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:26,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:10:26,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-21 21:10:26,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371896641] [2021-05-21 21:10:26,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 21:10:26,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:10:26,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 21:10:26,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-05-21 21:10:26,549 INFO L87 Difference]: Start difference. First operand 72 states and 138 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:26,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:10:26,864 INFO L93 Difference]: Finished difference Result 176 states and 320 transitions. [2021-05-21 21:10:26,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 21:10:26,864 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 21:10:26,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:10:26,865 INFO L225 Difference]: With dead ends: 176 [2021-05-21 21:10:26,865 INFO L226 Difference]: Without dead ends: 162 [2021-05-21 21:10:26,866 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 342.3ms TimeCoverageRelationStatistics Valid=137, Invalid=619, Unknown=0, NotChecked=0, Total=756 [2021-05-21 21:10:26,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-05-21 21:10:26,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 72. [2021-05-21 21:10:26,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.0) internal successors, (142), 71 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:26,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 142 transitions. [2021-05-21 21:10:26,868 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 142 transitions. Word has length 21 [2021-05-21 21:10:26,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:10:26,868 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 142 transitions. [2021-05-21 21:10:26,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:26,868 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 142 transitions. [2021-05-21 21:10:26,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 21:10:26,869 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:10:26,869 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:10:27,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:10:27,086 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:10:27,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:10:27,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1756829531, now seen corresponding path program 8 times [2021-05-21 21:10:27,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:10:27,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918624396] [2021-05-21 21:10:27,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:10:27,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:10:27,173 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:27,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:10:27,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918624396] [2021-05-21 21:10:27,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918624396] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:27,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893433207] [2021-05-21 21:10:27,173 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 [2021-05-21 21:10:27,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:10:27,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:10:27,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-21 21:10:27,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:10:27,387 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:27,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893433207] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:27,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:10:27,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-21 21:10:27,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902893330] [2021-05-21 21:10:27,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 21:10:27,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:10:27,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 21:10:27,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-05-21 21:10:27,389 INFO L87 Difference]: Start difference. First operand 72 states and 142 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:27,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:10:27,706 INFO L93 Difference]: Finished difference Result 163 states and 289 transitions. [2021-05-21 21:10:27,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 21:10:27,707 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 21:10:27,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:10:27,707 INFO L225 Difference]: With dead ends: 163 [2021-05-21 21:10:27,708 INFO L226 Difference]: Without dead ends: 149 [2021-05-21 21:10:27,708 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 338.8ms TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2021-05-21 21:10:27,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-05-21 21:10:27,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 71. [2021-05-21 21:10:27,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.9714285714285715) internal successors, (138), 70 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:27,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 138 transitions. [2021-05-21 21:10:27,710 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 138 transitions. Word has length 21 [2021-05-21 21:10:27,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:10:27,710 INFO L482 AbstractCegarLoop]: Abstraction has 71 states and 138 transitions. [2021-05-21 21:10:27,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:27,710 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 138 transitions. [2021-05-21 21:10:27,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 21:10:27,711 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:10:27,711 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:10:27,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-21 21:10:27,923 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:10:27,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:10:27,923 INFO L82 PathProgramCache]: Analyzing trace with hash 477277963, now seen corresponding path program 9 times [2021-05-21 21:10:27,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:10:27,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814449570] [2021-05-21 21:10:27,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:10:27,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:10:28,026 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:28,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:10:28,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814449570] [2021-05-21 21:10:28,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814449570] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:28,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089037178] [2021-05-21 21:10:28,026 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 [2021-05-21 21:10:28,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 21:10:28,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:10:28,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-21 21:10:28,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:10:28,240 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:28,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089037178] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:28,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:10:28,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-21 21:10:28,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738078376] [2021-05-21 21:10:28,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 21:10:28,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:10:28,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 21:10:28,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-05-21 21:10:28,241 INFO L87 Difference]: Start difference. First operand 71 states and 138 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:28,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:10:28,447 INFO L93 Difference]: Finished difference Result 104 states and 188 transitions. [2021-05-21 21:10:28,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 21:10:28,447 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 21:10:28,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:10:28,448 INFO L225 Difference]: With dead ends: 104 [2021-05-21 21:10:28,448 INFO L226 Difference]: Without dead ends: 90 [2021-05-21 21:10:28,448 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 286.9ms TimeCoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2021-05-21 21:10:28,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-05-21 21:10:28,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 73. [2021-05-21 21:10:28,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.9583333333333333) internal successors, (141), 72 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:28,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 141 transitions. [2021-05-21 21:10:28,450 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 141 transitions. Word has length 21 [2021-05-21 21:10:28,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:10:28,450 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 141 transitions. [2021-05-21 21:10:28,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:28,450 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 141 transitions. [2021-05-21 21:10:28,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 21:10:28,450 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:10:28,451 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:10:28,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:10:28,661 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:10:28,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:10:28,661 INFO L82 PathProgramCache]: Analyzing trace with hash -362797707, now seen corresponding path program 10 times [2021-05-21 21:10:28,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:10:28,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855159536] [2021-05-21 21:10:28,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:10:28,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:10:28,756 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:28,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:10:28,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855159536] [2021-05-21 21:10:28,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855159536] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:28,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903457654] [2021-05-21 21:10:28,757 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) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:10:28,778 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:10:28,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:10:28,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-21 21:10:28,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:10:28,951 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:28,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903457654] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:28,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:10:28,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-21 21:10:28,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131395696] [2021-05-21 21:10:28,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 21:10:28,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:10:28,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 21:10:28,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-05-21 21:10:28,952 INFO L87 Difference]: Start difference. First operand 73 states and 141 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:29,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:10:29,421 INFO L93 Difference]: Finished difference Result 171 states and 307 transitions. [2021-05-21 21:10:29,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-21 21:10:29,422 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 21:10:29,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:10:29,422 INFO L225 Difference]: With dead ends: 171 [2021-05-21 21:10:29,422 INFO L226 Difference]: Without dead ends: 157 [2021-05-21 21:10:29,423 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 499.5ms TimeCoverageRelationStatistics Valid=230, Invalid=1102, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 21:10:29,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-05-21 21:10:29,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 77. [2021-05-21 21:10:29,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.013157894736842) internal successors, (153), 76 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:29,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 153 transitions. [2021-05-21 21:10:29,425 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 153 transitions. Word has length 21 [2021-05-21 21:10:29,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:10:29,425 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 153 transitions. [2021-05-21 21:10:29,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:29,425 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 153 transitions. [2021-05-21 21:10:29,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 21:10:29,426 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:10:29,426 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:10:29,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:10:29,633 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:10:29,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:10:29,633 INFO L82 PathProgramCache]: Analyzing trace with hash 287271263, now seen corresponding path program 11 times [2021-05-21 21:10:29,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:10:29,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060395456] [2021-05-21 21:10:29,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:10:29,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:10:29,724 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:29,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:10:29,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060395456] [2021-05-21 21:10:29,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060395456] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:29,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298377763] [2021-05-21 21:10:29,724 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 [2021-05-21 21:10:29,744 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 21:10:29,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:10:29,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-21 21:10:29,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:10:29,924 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:29,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298377763] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:29,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:10:29,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-21 21:10:29,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117530675] [2021-05-21 21:10:29,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 21:10:29,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:10:29,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 21:10:29,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-05-21 21:10:29,925 INFO L87 Difference]: Start difference. First operand 77 states and 153 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:30,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:10:30,436 INFO L93 Difference]: Finished difference Result 171 states and 303 transitions. [2021-05-21 21:10:30,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-21 21:10:30,437 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 21:10:30,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:10:30,437 INFO L225 Difference]: With dead ends: 171 [2021-05-21 21:10:30,437 INFO L226 Difference]: Without dead ends: 157 [2021-05-21 21:10:30,438 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 538.2ms TimeCoverageRelationStatistics Valid=253, Invalid=1229, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 21:10:30,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-05-21 21:10:30,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 76. [2021-05-21 21:10:30,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.9866666666666666) internal successors, (149), 75 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:30,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 149 transitions. [2021-05-21 21:10:30,440 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 149 transitions. Word has length 21 [2021-05-21 21:10:30,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:10:30,440 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 149 transitions. [2021-05-21 21:10:30,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:30,440 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 149 transitions. [2021-05-21 21:10:30,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 21:10:30,441 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:10:30,441 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:10:30,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-21 21:10:30,656 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:10:30,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:10:30,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1773588539, now seen corresponding path program 12 times [2021-05-21 21:10:30,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:10:30,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74292416] [2021-05-21 21:10:30,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:10:30,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:10:30,753 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:30,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:10:30,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74292416] [2021-05-21 21:10:30,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74292416] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:30,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837504988] [2021-05-21 21:10:30,754 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 [2021-05-21 21:10:30,772 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 21:10:30,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:10:30,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-21 21:10:30,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:10:30,965 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:30,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837504988] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:30,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:10:30,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-21 21:10:30,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307816486] [2021-05-21 21:10:30,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 21:10:30,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:10:30,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 21:10:30,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-05-21 21:10:30,966 INFO L87 Difference]: Start difference. First operand 76 states and 149 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:31,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:10:31,371 INFO L93 Difference]: Finished difference Result 139 states and 248 transitions. [2021-05-21 21:10:31,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-21 21:10:31,371 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 21:10:31,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:10:31,372 INFO L225 Difference]: With dead ends: 139 [2021-05-21 21:10:31,372 INFO L226 Difference]: Without dead ends: 125 [2021-05-21 21:10:31,372 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 431.9ms TimeCoverageRelationStatistics Valid=187, Invalid=1003, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 21:10:31,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-05-21 21:10:31,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 73. [2021-05-21 21:10:31,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.9583333333333333) internal successors, (141), 72 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:31,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 141 transitions. [2021-05-21 21:10:31,374 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 141 transitions. Word has length 21 [2021-05-21 21:10:31,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:10:31,374 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 141 transitions. [2021-05-21 21:10:31,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:31,374 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 141 transitions. [2021-05-21 21:10:31,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-21 21:10:31,374 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:10:31,374 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:10:31,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-21 21:10:31,589 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:10:31,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:10:31,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1986148955, now seen corresponding path program 13 times [2021-05-21 21:10:31,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:10:31,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846945032] [2021-05-21 21:10:31,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:10:31,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:10:31,675 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:31,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:10:31,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846945032] [2021-05-21 21:10:31,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846945032] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:31,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339746313] [2021-05-21 21:10:31,675 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 [2021-05-21 21:10:31,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:10:31,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-21 21:10:31,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:10:31,889 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:31,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339746313] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:31,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:10:31,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-21 21:10:31,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614993169] [2021-05-21 21:10:31,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 21:10:31,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:10:31,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 21:10:31,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-05-21 21:10:31,890 INFO L87 Difference]: Start difference. First operand 73 states and 141 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:32,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:10:32,185 INFO L93 Difference]: Finished difference Result 124 states and 220 transitions. [2021-05-21 21:10:32,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 21:10:32,185 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-21 21:10:32,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:10:32,185 INFO L225 Difference]: With dead ends: 124 [2021-05-21 21:10:32,185 INFO L226 Difference]: Without dead ends: 92 [2021-05-21 21:10:32,186 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 375.8ms TimeCoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2021-05-21 21:10:32,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-05-21 21:10:32,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 69. [2021-05-21 21:10:32,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.9264705882352942) internal successors, (131), 68 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:32,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 131 transitions. [2021-05-21 21:10:32,187 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 131 transitions. Word has length 21 [2021-05-21 21:10:32,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:10:32,188 INFO L482 AbstractCegarLoop]: Abstraction has 69 states and 131 transitions. [2021-05-21 21:10:32,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:32,188 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 131 transitions. [2021-05-21 21:10:32,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:10:32,188 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:10:32,188 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:10:32,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-21 21:10:32,397 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:10:32,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:10:32,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1776759271, now seen corresponding path program 14 times [2021-05-21 21:10:32,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:10:32,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930997594] [2021-05-21 21:10:32,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:10:32,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:10:32,553 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:32,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:10:32,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930997594] [2021-05-21 21:10:32,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930997594] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:32,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770441109] [2021-05-21 21:10:32,554 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 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 [2021-05-21 21:10:32,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:10:32,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:10:32,572 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 21:10:32,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:10:32,777 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:32,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770441109] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:32,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:10:32,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 21:10:32,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928678419] [2021-05-21 21:10:32,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 21:10:32,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:10:32,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 21:10:32,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-05-21 21:10:32,778 INFO L87 Difference]: Start difference. First operand 69 states and 131 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-05-21 21:10:33,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:10:33,038 INFO L93 Difference]: Finished difference Result 120 states and 222 transitions. [2021-05-21 21:10:33,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 21:10:33,039 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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 23 [2021-05-21 21:10:33,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:10:33,039 INFO L225 Difference]: With dead ends: 120 [2021-05-21 21:10:33,039 INFO L226 Difference]: Without dead ends: 106 [2021-05-21 21:10:33,040 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 407.6ms TimeCoverageRelationStatistics Valid=159, Invalid=711, Unknown=0, NotChecked=0, Total=870 [2021-05-21 21:10:33,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-05-21 21:10:33,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 64. [2021-05-21 21:10:33,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.8888888888888888) internal successors, (119), 63 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:33,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 119 transitions. [2021-05-21 21:10:33,041 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 119 transitions. Word has length 23 [2021-05-21 21:10:33,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:10:33,041 INFO L482 AbstractCegarLoop]: Abstraction has 64 states and 119 transitions. [2021-05-21 21:10:33,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-05-21 21:10:33,042 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 119 transitions. [2021-05-21 21:10:33,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:10:33,042 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:10:33,042 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:10:33,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:10:33,255 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:10:33,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:10:33,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1249492263, now seen corresponding path program 15 times [2021-05-21 21:10:33,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:10:33,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512369932] [2021-05-21 21:10:33,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:10:33,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:10:33,406 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:33,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:10:33,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512369932] [2021-05-21 21:10:33,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512369932] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:33,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704211866] [2021-05-21 21:10:33,406 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 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 [2021-05-21 21:10:33,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 21:10:33,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:10:33,426 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 21:10:33,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:10:33,628 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:33,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704211866] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:33,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:10:33,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 21:10:33,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236169405] [2021-05-21 21:10:33,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 21:10:33,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:10:33,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 21:10:33,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-05-21 21:10:33,629 INFO L87 Difference]: Start difference. First operand 64 states and 119 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-05-21 21:10:34,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:10:34,508 INFO L93 Difference]: Finished difference Result 225 states and 407 transitions. [2021-05-21 21:10:34,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-21 21:10:34,508 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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 23 [2021-05-21 21:10:34,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:10:34,510 INFO L225 Difference]: With dead ends: 225 [2021-05-21 21:10:34,510 INFO L226 Difference]: Without dead ends: 175 [2021-05-21 21:10:34,511 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 872 ImplicationChecksByTransitivity, 893.7ms TimeCoverageRelationStatistics Valid=425, Invalid=2655, Unknown=0, NotChecked=0, Total=3080 [2021-05-21 21:10:34,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-05-21 21:10:34,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 92. [2021-05-21 21:10:34,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.032967032967033) internal successors, (185), 91 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:34,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 185 transitions. [2021-05-21 21:10:34,514 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 185 transitions. Word has length 23 [2021-05-21 21:10:34,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:10:34,514 INFO L482 AbstractCegarLoop]: Abstraction has 92 states and 185 transitions. [2021-05-21 21:10:34,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-05-21 21:10:34,514 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 185 transitions. [2021-05-21 21:10:34,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:10:34,514 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:10:34,514 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:10:34,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-21 21:10:34,726 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:10:34,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:10:34,726 INFO L82 PathProgramCache]: Analyzing trace with hash 380430255, now seen corresponding path program 16 times [2021-05-21 21:10:34,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:10:34,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712831512] [2021-05-21 21:10:34,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:10:34,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:10:34,922 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:34,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:10:34,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712831512] [2021-05-21 21:10:34,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712831512] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:34,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984227765] [2021-05-21 21:10:34,923 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:10:34,941 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:10:34,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:10:34,941 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 21:10:34,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:10:35,157 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:35,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984227765] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:35,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:10:35,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 21:10:35,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158961689] [2021-05-21 21:10:35,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 21:10:35,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:10:35,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 21:10:35,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-05-21 21:10:35,158 INFO L87 Difference]: Start difference. First operand 92 states and 185 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-05-21 21:10:36,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:10:36,484 INFO L93 Difference]: Finished difference Result 293 states and 527 transitions. [2021-05-21 21:10:36,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-21 21:10:36,485 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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 23 [2021-05-21 21:10:36,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:10:36,486 INFO L225 Difference]: With dead ends: 293 [2021-05-21 21:10:36,486 INFO L226 Difference]: Without dead ends: 254 [2021-05-21 21:10:36,486 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1107 ImplicationChecksByTransitivity, 1240.8ms TimeCoverageRelationStatistics Valid=557, Invalid=3225, Unknown=0, NotChecked=0, Total=3782 [2021-05-21 21:10:36,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-05-21 21:10:36,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 107. [2021-05-21 21:10:36,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0660377358490565) internal successors, (219), 106 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:36,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 219 transitions. [2021-05-21 21:10:36,489 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 219 transitions. Word has length 23 [2021-05-21 21:10:36,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:10:36,489 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 219 transitions. [2021-05-21 21:10:36,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-05-21 21:10:36,490 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 219 transitions. [2021-05-21 21:10:36,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:10:36,490 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:10:36,490 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:10:36,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-21 21:10:36,693 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:10:36,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:10:36,693 INFO L82 PathProgramCache]: Analyzing trace with hash -884497605, now seen corresponding path program 17 times [2021-05-21 21:10:36,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:10:36,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717457223] [2021-05-21 21:10:36,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:10:36,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:10:36,898 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:36,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:10:36,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717457223] [2021-05-21 21:10:36,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717457223] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:36,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182204360] [2021-05-21 21:10:36,898 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:10:36,917 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 21:10:36,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:10:36,918 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 21:10:36,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:10:37,119 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:37,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182204360] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:37,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:10:37,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 21:10:37,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246825126] [2021-05-21 21:10:37,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 21:10:37,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:10:37,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 21:10:37,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-05-21 21:10:37,120 INFO L87 Difference]: Start difference. First operand 107 states and 219 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-05-21 21:10:38,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:10:38,250 INFO L93 Difference]: Finished difference Result 263 states and 468 transitions. [2021-05-21 21:10:38,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-21 21:10:38,250 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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 23 [2021-05-21 21:10:38,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:10:38,251 INFO L225 Difference]: With dead ends: 263 [2021-05-21 21:10:38,251 INFO L226 Difference]: Without dead ends: 236 [2021-05-21 21:10:38,252 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 933 ImplicationChecksByTransitivity, 1120.2ms TimeCoverageRelationStatistics Valid=512, Invalid=2794, Unknown=0, NotChecked=0, Total=3306 [2021-05-21 21:10:38,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-05-21 21:10:38,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 109. [2021-05-21 21:10:38,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.0925925925925926) internal successors, (226), 108 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:38,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 226 transitions. [2021-05-21 21:10:38,254 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 226 transitions. Word has length 23 [2021-05-21 21:10:38,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:10:38,254 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 226 transitions. [2021-05-21 21:10:38,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-05-21 21:10:38,255 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 226 transitions. [2021-05-21 21:10:38,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:10:38,255 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:10:38,255 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:10:38,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:10:38,471 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:10:38,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:10:38,471 INFO L82 PathProgramCache]: Analyzing trace with hash 251687667, now seen corresponding path program 18 times [2021-05-21 21:10:38,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:10:38,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449082569] [2021-05-21 21:10:38,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:10:38,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:10:38,622 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:38,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:10:38,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449082569] [2021-05-21 21:10:38,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449082569] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:38,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902911649] [2021-05-21 21:10:38,622 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:10:38,641 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 21:10:38,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:10:38,642 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 21:10:38,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:10:38,822 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:38,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902911649] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:38,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:10:38,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 21:10:38,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998040505] [2021-05-21 21:10:38,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 21:10:38,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:10:38,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 21:10:38,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-05-21 21:10:38,823 INFO L87 Difference]: Start difference. First operand 109 states and 226 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-05-21 21:10:39,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:10:39,900 INFO L93 Difference]: Finished difference Result 280 states and 496 transitions. [2021-05-21 21:10:39,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-21 21:10:39,900 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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 23 [2021-05-21 21:10:39,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:10:39,901 INFO L225 Difference]: With dead ends: 280 [2021-05-21 21:10:39,901 INFO L226 Difference]: Without dead ends: 256 [2021-05-21 21:10:39,902 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 999 ImplicationChecksByTransitivity, 975.8ms TimeCoverageRelationStatistics Valid=546, Invalid=2876, Unknown=0, NotChecked=0, Total=3422 [2021-05-21 21:10:39,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-05-21 21:10:39,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 108. [2021-05-21 21:10:39,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.130841121495327) internal successors, (228), 107 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:39,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 228 transitions. [2021-05-21 21:10:39,905 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 228 transitions. Word has length 23 [2021-05-21 21:10:39,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:10:39,905 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 228 transitions. [2021-05-21 21:10:39,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-05-21 21:10:39,905 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 228 transitions. [2021-05-21 21:10:39,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:10:39,905 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:10:39,905 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:10:40,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:10:40,120 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:10:40,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:10:40,121 INFO L82 PathProgramCache]: Analyzing trace with hash 901756637, now seen corresponding path program 19 times [2021-05-21 21:10:40,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:10:40,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043322999] [2021-05-21 21:10:40,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:10:40,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:10:40,261 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:40,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:10:40,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043322999] [2021-05-21 21:10:40,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043322999] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:40,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70057917] [2021-05-21 21:10:40,261 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:10:40,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:10:40,279 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 21:10:40,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:10:40,456 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:40,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70057917] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:40,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:10:40,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 21:10:40,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379041318] [2021-05-21 21:10:40,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 21:10:40,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:10:40,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 21:10:40,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-05-21 21:10:40,457 INFO L87 Difference]: Start difference. First operand 108 states and 228 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-05-21 21:10:41,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:10:41,494 INFO L93 Difference]: Finished difference Result 241 states and 458 transitions. [2021-05-21 21:10:41,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-21 21:10:41,494 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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 23 [2021-05-21 21:10:41,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:10:41,495 INFO L225 Difference]: With dead ends: 241 [2021-05-21 21:10:41,495 INFO L226 Difference]: Without dead ends: 220 [2021-05-21 21:10:41,496 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 960 ImplicationChecksByTransitivity, 970.5ms TimeCoverageRelationStatistics Valid=539, Invalid=2767, Unknown=0, NotChecked=0, Total=3306 [2021-05-21 21:10:41,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-05-21 21:10:41,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 122. [2021-05-21 21:10:41,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.190082644628099) internal successors, (265), 121 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:41,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 265 transitions. [2021-05-21 21:10:41,498 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 265 transitions. Word has length 23 [2021-05-21 21:10:41,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:10:41,498 INFO L482 AbstractCegarLoop]: Abstraction has 122 states and 265 transitions. [2021-05-21 21:10:41,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-05-21 21:10:41,498 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 265 transitions. [2021-05-21 21:10:41,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:10:41,499 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:10:41,499 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:10:41,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:10:41,713 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:10:41,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:10:41,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1035227257, now seen corresponding path program 20 times [2021-05-21 21:10:41,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:10:41,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816800428] [2021-05-21 21:10:41,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:10:41,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:10:41,860 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:41,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:10:41,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816800428] [2021-05-21 21:10:41,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816800428] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:41,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450997736] [2021-05-21 21:10:41,860 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 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 [2021-05-21 21:10:41,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:10:41,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:10:41,879 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 21:10:41,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:10:42,083 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:42,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450997736] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:42,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:10:42,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 21:10:42,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687384634] [2021-05-21 21:10:42,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 21:10:42,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:10:42,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 21:10:42,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-05-21 21:10:42,084 INFO L87 Difference]: Start difference. First operand 122 states and 265 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-05-21 21:10:43,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:10:43,484 INFO L93 Difference]: Finished difference Result 342 states and 656 transitions. [2021-05-21 21:10:43,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-21 21:10:43,484 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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 23 [2021-05-21 21:10:43,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:10:43,485 INFO L225 Difference]: With dead ends: 342 [2021-05-21 21:10:43,485 INFO L226 Difference]: Without dead ends: 300 [2021-05-21 21:10:43,486 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1092 ImplicationChecksByTransitivity, 1329.8ms TimeCoverageRelationStatistics Valid=562, Invalid=3220, Unknown=0, NotChecked=0, Total=3782 [2021-05-21 21:10:43,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-05-21 21:10:43,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 150. [2021-05-21 21:10:43,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.248322147651007) internal successors, (335), 149 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:43,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 335 transitions. [2021-05-21 21:10:43,489 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 335 transitions. Word has length 23 [2021-05-21 21:10:43,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:10:43,489 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 335 transitions. [2021-05-21 21:10:43,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-05-21 21:10:43,489 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 335 transitions. [2021-05-21 21:10:43,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:10:43,489 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:10:43,489 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:10:43,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-21 21:10:43,705 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:10:43,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:10:43,705 INFO L82 PathProgramCache]: Analyzing trace with hash -229700603, now seen corresponding path program 21 times [2021-05-21 21:10:43,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:10:43,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066222966] [2021-05-21 21:10:43,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:10:43,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:10:43,841 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:43,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:10:43,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066222966] [2021-05-21 21:10:43,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066222966] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:43,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991906622] [2021-05-21 21:10:43,842 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 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 [2021-05-21 21:10:43,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 21:10:43,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:10:43,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 21:10:43,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:10:44,087 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:44,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991906622] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:44,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:10:44,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 21:10:44,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055236262] [2021-05-21 21:10:44,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 21:10:44,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:10:44,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 21:10:44,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-05-21 21:10:44,088 INFO L87 Difference]: Start difference. First operand 150 states and 335 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-05-21 21:10:45,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:10:45,461 INFO L93 Difference]: Finished difference Result 335 states and 651 transitions. [2021-05-21 21:10:45,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-21 21:10:45,461 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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 23 [2021-05-21 21:10:45,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:10:45,462 INFO L225 Difference]: With dead ends: 335 [2021-05-21 21:10:45,462 INFO L226 Difference]: Without dead ends: 315 [2021-05-21 21:10:45,463 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1013 ImplicationChecksByTransitivity, 1269.3ms TimeCoverageRelationStatistics Valid=546, Invalid=2994, Unknown=0, NotChecked=0, Total=3540 [2021-05-21 21:10:45,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-05-21 21:10:45,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 154. [2021-05-21 21:10:45,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.261437908496732) internal successors, (346), 153 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:45,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 346 transitions. [2021-05-21 21:10:45,466 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 346 transitions. Word has length 23 [2021-05-21 21:10:45,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:10:45,466 INFO L482 AbstractCegarLoop]: Abstraction has 154 states and 346 transitions. [2021-05-21 21:10:45,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-05-21 21:10:45,466 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 346 transitions. [2021-05-21 21:10:45,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:10:45,467 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:10:45,467 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:10:45,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-21 21:10:45,681 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:10:45,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:10:45,681 INFO L82 PathProgramCache]: Analyzing trace with hash 906484669, now seen corresponding path program 22 times [2021-05-21 21:10:45,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:10:45,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457062913] [2021-05-21 21:10:45,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:10:45,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:10:45,821 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:45,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:10:45,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457062913] [2021-05-21 21:10:45,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457062913] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:45,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390588460] [2021-05-21 21:10:45,822 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-21 21:10:45,849 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:10:45,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:10:45,850 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 21:10:45,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:10:46,075 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:46,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390588460] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:46,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:10:46,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 21:10:46,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326742886] [2021-05-21 21:10:46,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 21:10:46,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:10:46,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 21:10:46,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-05-21 21:10:46,076 INFO L87 Difference]: Start difference. First operand 154 states and 346 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-05-21 21:10:47,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:10:47,308 INFO L93 Difference]: Finished difference Result 324 states and 640 transitions. [2021-05-21 21:10:47,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-21 21:10:47,308 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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 23 [2021-05-21 21:10:47,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:10:47,309 INFO L225 Difference]: With dead ends: 324 [2021-05-21 21:10:47,309 INFO L226 Difference]: Without dead ends: 307 [2021-05-21 21:10:47,310 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 931 ImplicationChecksByTransitivity, 1226.7ms TimeCoverageRelationStatistics Valid=560, Invalid=2746, Unknown=0, NotChecked=0, Total=3306 [2021-05-21 21:10:47,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-05-21 21:10:47,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 149. [2021-05-21 21:10:47,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.2635135135135136) internal successors, (335), 148 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:47,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 335 transitions. [2021-05-21 21:10:47,313 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 335 transitions. Word has length 23 [2021-05-21 21:10:47,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:10:47,313 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 335 transitions. [2021-05-21 21:10:47,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-05-21 21:10:47,313 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 335 transitions. [2021-05-21 21:10:47,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:10:47,313 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:10:47,313 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:10:47,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:10:47,528 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:10:47,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:10:47,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1644322069, now seen corresponding path program 23 times [2021-05-21 21:10:47,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:10:47,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657312693] [2021-05-21 21:10:47,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:10:47,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:10:47,666 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:47,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:10:47,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657312693] [2021-05-21 21:10:47,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657312693] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:47,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529727215] [2021-05-21 21:10:47,666 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 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 [2021-05-21 21:10:47,687 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 21:10:47,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:10:47,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 21:10:47,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:10:47,942 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:47,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529727215] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:47,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:10:47,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 21:10:47,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818359950] [2021-05-21 21:10:47,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 21:10:47,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:10:47,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 21:10:47,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-05-21 21:10:47,943 INFO L87 Difference]: Start difference. First operand 149 states and 335 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-05-21 21:10:49,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:10:49,136 INFO L93 Difference]: Finished difference Result 335 states and 686 transitions. [2021-05-21 21:10:49,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-21 21:10:49,136 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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 23 [2021-05-21 21:10:49,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:10:49,139 INFO L225 Difference]: With dead ends: 335 [2021-05-21 21:10:49,139 INFO L226 Difference]: Without dead ends: 321 [2021-05-21 21:10:49,139 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 787 ImplicationChecksByTransitivity, 1197.5ms TimeCoverageRelationStatistics Valid=519, Invalid=2451, Unknown=0, NotChecked=0, Total=2970 [2021-05-21 21:10:49,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-05-21 21:10:49,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 176. [2021-05-21 21:10:49,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.2914285714285714) internal successors, (401), 175 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:49,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 401 transitions. [2021-05-21 21:10:49,142 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 401 transitions. Word has length 23 [2021-05-21 21:10:49,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:10:49,142 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 401 transitions. [2021-05-21 21:10:49,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-05-21 21:10:49,143 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 401 transitions. [2021-05-21 21:10:49,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-21 21:10:49,143 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:10:49,143 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:10:49,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-21 21:10:49,353 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:10:49,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:10:49,353 INFO L82 PathProgramCache]: Analyzing trace with hash -949311587, now seen corresponding path program 24 times [2021-05-21 21:10:49,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:10:49,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542589603] [2021-05-21 21:10:49,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:10:49,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:10:49,481 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:49,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:10:49,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542589603] [2021-05-21 21:10:49,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542589603] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:49,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755056407] [2021-05-21 21:10:49,482 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 21:10:49,514 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 21:10:49,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:10:49,515 WARN L261 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 21:10:49,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:10:49,710 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:49,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755056407] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:49,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:10:49,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-05-21 21:10:49,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413265816] [2021-05-21 21:10:49,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 21:10:49,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:10:49,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 21:10:49,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-05-21 21:10:49,711 INFO L87 Difference]: Start difference. First operand 176 states and 401 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-05-21 21:10:50,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:10:50,816 INFO L93 Difference]: Finished difference Result 418 states and 882 transitions. [2021-05-21 21:10:50,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-21 21:10:50,816 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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 23 [2021-05-21 21:10:50,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:10:50,817 INFO L225 Difference]: With dead ends: 418 [2021-05-21 21:10:50,817 INFO L226 Difference]: Without dead ends: 404 [2021-05-21 21:10:50,818 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 1022.4ms TimeCoverageRelationStatistics Valid=498, Invalid=2258, Unknown=0, NotChecked=0, Total=2756 [2021-05-21 21:10:50,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-05-21 21:10:50,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 193. [2021-05-21 21:10:50,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.3541666666666665) internal successors, (452), 192 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:50,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 452 transitions. [2021-05-21 21:10:50,822 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 452 transitions. Word has length 23 [2021-05-21 21:10:50,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:10:50,822 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 452 transitions. [2021-05-21 21:10:50,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 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) [2021-05-21 21:10:50,822 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 452 transitions. [2021-05-21 21:10:50,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:10:50,822 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:10:50,822 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:10:51,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:10:51,034 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:10:51,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:10:51,034 INFO L82 PathProgramCache]: Analyzing trace with hash 45870327, now seen corresponding path program 25 times [2021-05-21 21:10:51,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:10:51,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302490733] [2021-05-21 21:10:51,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:10:51,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:10:51,145 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:51,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:10:51,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302490733] [2021-05-21 21:10:51,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302490733] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:51,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157340411] [2021-05-21 21:10:51,145 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 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 [2021-05-21 21:10:51,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:10:51,174 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-21 21:10:51,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:10:51,385 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:51,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157340411] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:51,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:10:51,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-05-21 21:10:51,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048667289] [2021-05-21 21:10:51,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-21 21:10:51,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:10:51,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-21 21:10:51,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-05-21 21:10:51,387 INFO L87 Difference]: Start difference. First operand 193 states and 452 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:52,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:10:52,179 INFO L93 Difference]: Finished difference Result 441 states and 930 transitions. [2021-05-21 21:10:52,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-21 21:10:52,179 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:10:52,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:10:52,180 INFO L225 Difference]: With dead ends: 441 [2021-05-21 21:10:52,180 INFO L226 Difference]: Without dead ends: 420 [2021-05-21 21:10:52,181 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 747.2ms TimeCoverageRelationStatistics Valid=399, Invalid=2253, Unknown=0, NotChecked=0, Total=2652 [2021-05-21 21:10:52,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-05-21 21:10:52,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 228. [2021-05-21 21:10:52,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.409691629955947) internal successors, (547), 227 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:52,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 547 transitions. [2021-05-21 21:10:52,185 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 547 transitions. Word has length 25 [2021-05-21 21:10:52,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:10:52,185 INFO L482 AbstractCegarLoop]: Abstraction has 228 states and 547 transitions. [2021-05-21 21:10:52,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:52,185 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 547 transitions. [2021-05-21 21:10:52,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:10:52,185 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:10:52,185 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:10:52,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-05-21 21:10:52,400 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:10:52,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:10:52,400 INFO L82 PathProgramCache]: Analyzing trace with hash 695939297, now seen corresponding path program 26 times [2021-05-21 21:10:52,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:10:52,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595321148] [2021-05-21 21:10:52,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:10:52,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:10:52,510 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:52,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:10:52,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595321148] [2021-05-21 21:10:52,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595321148] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:52,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681633524] [2021-05-21 21:10:52,510 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:10:52,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:10:52,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:10:52,534 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-21 21:10:52,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:10:52,756 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:52,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681633524] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:52,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:10:52,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-05-21 21:10:52,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346986229] [2021-05-21 21:10:52,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-21 21:10:52,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:10:52,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-21 21:10:52,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-05-21 21:10:52,757 INFO L87 Difference]: Start difference. First operand 228 states and 547 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:53,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:10:53,694 INFO L93 Difference]: Finished difference Result 450 states and 937 transitions. [2021-05-21 21:10:53,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-21 21:10:53,695 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:10:53,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:10:53,696 INFO L225 Difference]: With dead ends: 450 [2021-05-21 21:10:53,696 INFO L226 Difference]: Without dead ends: 429 [2021-05-21 21:10:53,696 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 873 ImplicationChecksByTransitivity, 882.4ms TimeCoverageRelationStatistics Valid=486, Invalid=2820, Unknown=0, NotChecked=0, Total=3306 [2021-05-21 21:10:53,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-05-21 21:10:53,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 228. [2021-05-21 21:10:53,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.409691629955947) internal successors, (547), 227 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:53,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 547 transitions. [2021-05-21 21:10:53,700 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 547 transitions. Word has length 25 [2021-05-21 21:10:53,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:10:53,701 INFO L482 AbstractCegarLoop]: Abstraction has 228 states and 547 transitions. [2021-05-21 21:10:53,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:53,701 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 547 transitions. [2021-05-21 21:10:53,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:10:53,701 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:10:53,701 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:10:53,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:10:53,917 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:10:53,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:10:53,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1364920505, now seen corresponding path program 27 times [2021-05-21 21:10:53,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:10:53,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399857370] [2021-05-21 21:10:53,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:10:53,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:10:54,021 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:54,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:10:54,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399857370] [2021-05-21 21:10:54,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399857370] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:54,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15086762] [2021-05-21 21:10:54,021 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:10:54,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-21 21:10:54,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:10:54,042 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-21 21:10:54,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:10:54,270 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:54,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15086762] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:54,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:10:54,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-05-21 21:10:54,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856725511] [2021-05-21 21:10:54,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-21 21:10:54,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:10:54,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-21 21:10:54,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-05-21 21:10:54,271 INFO L87 Difference]: Start difference. First operand 228 states and 547 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:54,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:10:54,983 INFO L93 Difference]: Finished difference Result 320 states and 692 transitions. [2021-05-21 21:10:54,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-21 21:10:54,983 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:10:54,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:10:54,984 INFO L225 Difference]: With dead ends: 320 [2021-05-21 21:10:54,984 INFO L226 Difference]: Without dead ends: 299 [2021-05-21 21:10:54,984 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 710.2ms TimeCoverageRelationStatistics Valid=334, Invalid=2116, Unknown=0, NotChecked=0, Total=2450 [2021-05-21 21:10:54,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-05-21 21:10:54,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 230. [2021-05-21 21:10:54,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.4017467248908297) internal successors, (550), 229 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:54,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 550 transitions. [2021-05-21 21:10:54,988 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 550 transitions. Word has length 25 [2021-05-21 21:10:54,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:10:54,988 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 550 transitions. [2021-05-21 21:10:54,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:54,988 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 550 transitions. [2021-05-21 21:10:54,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:10:54,988 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:10:54,988 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:10:55,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-05-21 21:10:55,204 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:10:55,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:10:55,204 INFO L82 PathProgramCache]: Analyzing trace with hash 740880809, now seen corresponding path program 28 times [2021-05-21 21:10:55,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:10:55,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355863877] [2021-05-21 21:10:55,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:10:55,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:10:55,299 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:55,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:10:55,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355863877] [2021-05-21 21:10:55,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355863877] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:55,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413510740] [2021-05-21 21:10:55,300 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 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 [2021-05-21 21:10:55,334 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:10:55,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:10:55,335 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-21 21:10:55,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:10:55,557 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:55,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413510740] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:55,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:10:55,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-05-21 21:10:55,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151784733] [2021-05-21 21:10:55,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-21 21:10:55,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:10:55,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-21 21:10:55,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-05-21 21:10:55,558 INFO L87 Difference]: Start difference. First operand 230 states and 550 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:56,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:10:56,773 INFO L93 Difference]: Finished difference Result 676 states and 1412 transitions. [2021-05-21 21:10:56,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-21 21:10:56,773 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:10:56,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:10:56,775 INFO L225 Difference]: With dead ends: 676 [2021-05-21 21:10:56,775 INFO L226 Difference]: Without dead ends: 635 [2021-05-21 21:10:56,775 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1229 ImplicationChecksByTransitivity, 1018.6ms TimeCoverageRelationStatistics Valid=575, Invalid=3585, Unknown=0, NotChecked=0, Total=4160 [2021-05-21 21:10:56,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-05-21 21:10:56,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 344. [2021-05-21 21:10:56,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 2.498542274052478) internal successors, (857), 343 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:56,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 857 transitions. [2021-05-21 21:10:56,781 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 857 transitions. Word has length 25 [2021-05-21 21:10:56,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:10:56,781 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 857 transitions. [2021-05-21 21:10:56,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:56,781 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 857 transitions. [2021-05-21 21:10:56,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:10:56,782 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:10:56,782 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:10:56,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:10:56,998 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:10:56,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:10:56,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1390949779, now seen corresponding path program 29 times [2021-05-21 21:10:56,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:10:56,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390995905] [2021-05-21 21:10:56,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:10:57,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:10:57,106 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:57,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:10:57,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390995905] [2021-05-21 21:10:57,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390995905] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:57,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946803519] [2021-05-21 21:10:57,107 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:10:57,127 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-21 21:10:57,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:10:57,128 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-21 21:10:57,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:10:57,348 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:57,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946803519] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:57,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:10:57,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-05-21 21:10:57,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126948446] [2021-05-21 21:10:57,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-21 21:10:57,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:10:57,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-21 21:10:57,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-05-21 21:10:57,349 INFO L87 Difference]: Start difference. First operand 344 states and 857 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:58,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:10:58,642 INFO L93 Difference]: Finished difference Result 642 states and 1345 transitions. [2021-05-21 21:10:58,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-21 21:10:58,643 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:10:58,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:10:58,645 INFO L225 Difference]: With dead ends: 642 [2021-05-21 21:10:58,645 INFO L226 Difference]: Without dead ends: 607 [2021-05-21 21:10:58,645 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1352 ImplicationChecksByTransitivity, 1101.8ms TimeCoverageRelationStatistics Valid=619, Invalid=3937, Unknown=0, NotChecked=0, Total=4556 [2021-05-21 21:10:58,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-05-21 21:10:58,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 305. [2021-05-21 21:10:58,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.4309210526315788) internal successors, (739), 304 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:58,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 739 transitions. [2021-05-21 21:10:58,650 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 739 transitions. Word has length 25 [2021-05-21 21:10:58,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:10:58,650 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 739 transitions. [2021-05-21 21:10:58,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:58,650 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 739 transitions. [2021-05-21 21:10:58,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:10:58,651 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:10:58,651 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:10:58,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-21 21:10:58,865 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:10:58,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:10:58,865 INFO L82 PathProgramCache]: Analyzing trace with hash -669910023, now seen corresponding path program 30 times [2021-05-21 21:10:58,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:10:58,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324780920] [2021-05-21 21:10:58,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:10:58,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:10:58,964 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:58,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:10:58,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324780920] [2021-05-21 21:10:58,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324780920] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:58,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815921607] [2021-05-21 21:10:58,964 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 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 [2021-05-21 21:10:58,987 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-21 21:10:58,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:10:58,987 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-21 21:10:58,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:10:59,207 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:10:59,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815921607] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:10:59,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:10:59,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-05-21 21:10:59,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121443361] [2021-05-21 21:10:59,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-21 21:10:59,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:10:59,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-21 21:10:59,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-05-21 21:10:59,208 INFO L87 Difference]: Start difference. First operand 305 states and 739 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:59,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:10:59,962 INFO L93 Difference]: Finished difference Result 433 states and 956 transitions. [2021-05-21 21:10:59,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-21 21:10:59,962 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:10:59,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:10:59,963 INFO L225 Difference]: With dead ends: 433 [2021-05-21 21:10:59,963 INFO L226 Difference]: Without dead ends: 412 [2021-05-21 21:10:59,963 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 704.1ms TimeCoverageRelationStatistics Valid=319, Invalid=2131, Unknown=0, NotChecked=0, Total=2450 [2021-05-21 21:10:59,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-05-21 21:10:59,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 296. [2021-05-21 21:10:59,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.4372881355932203) internal successors, (719), 295 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:59,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 719 transitions. [2021-05-21 21:10:59,968 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 719 transitions. Word has length 25 [2021-05-21 21:10:59,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:10:59,968 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 719 transitions. [2021-05-21 21:10:59,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:10:59,968 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 719 transitions. [2021-05-21 21:10:59,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:10:59,968 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:10:59,968 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:00,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:11:00,184 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:00,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:00,184 INFO L82 PathProgramCache]: Analyzing trace with hash -271811723, now seen corresponding path program 31 times [2021-05-21 21:11:00,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:00,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539127201] [2021-05-21 21:11:00,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:00,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:00,282 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:00,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:00,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539127201] [2021-05-21 21:11:00,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539127201] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:00,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954702666] [2021-05-21 21:11:00,283 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 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 [2021-05-21 21:11:00,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:00,303 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-21 21:11:00,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:00,510 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:00,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954702666] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:00,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:00,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-05-21 21:11:00,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914484756] [2021-05-21 21:11:00,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-21 21:11:00,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:00,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-21 21:11:00,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-05-21 21:11:00,511 INFO L87 Difference]: Start difference. First operand 296 states and 719 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:01,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:01,884 INFO L93 Difference]: Finished difference Result 836 states and 1776 transitions. [2021-05-21 21:11:01,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-05-21 21:11:01,884 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:11:01,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:01,886 INFO L225 Difference]: With dead ends: 836 [2021-05-21 21:11:01,886 INFO L226 Difference]: Without dead ends: 792 [2021-05-21 21:11:01,887 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1945 ImplicationChecksByTransitivity, 1257.0ms TimeCoverageRelationStatistics Valid=839, Invalid=5013, Unknown=0, NotChecked=0, Total=5852 [2021-05-21 21:11:01,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2021-05-21 21:11:01,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 410. [2021-05-21 21:11:01,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 2.5623471882640585) internal successors, (1048), 409 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:01,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 1048 transitions. [2021-05-21 21:11:01,893 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 1048 transitions. Word has length 25 [2021-05-21 21:11:01,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:01,893 INFO L482 AbstractCegarLoop]: Abstraction has 410 states and 1048 transitions. [2021-05-21 21:11:01,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:01,894 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 1048 transitions. [2021-05-21 21:11:01,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:11:01,894 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:01,894 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:02,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-21 21:11:02,107 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:02,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:02,108 INFO L82 PathProgramCache]: Analyzing trace with hash 378257247, now seen corresponding path program 32 times [2021-05-21 21:11:02,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:02,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486705119] [2021-05-21 21:11:02,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:02,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:02,205 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:02,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:02,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486705119] [2021-05-21 21:11:02,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486705119] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:02,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907880264] [2021-05-21 21:11:02,205 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-21 21:11:02,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:11:02,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:11:02,228 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-21 21:11:02,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:11:02,444 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:02,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907880264] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:02,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:02,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-05-21 21:11:02,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380973155] [2021-05-21 21:11:02,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-21 21:11:02,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:02,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-21 21:11:02,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-05-21 21:11:02,445 INFO L87 Difference]: Start difference. First operand 410 states and 1048 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:03,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:03,960 INFO L93 Difference]: Finished difference Result 801 states and 1700 transitions. [2021-05-21 21:11:03,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-05-21 21:11:03,960 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:11:03,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:03,962 INFO L225 Difference]: With dead ends: 801 [2021-05-21 21:11:03,962 INFO L226 Difference]: Without dead ends: 766 [2021-05-21 21:11:03,962 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2153 ImplicationChecksByTransitivity, 1387.2ms TimeCoverageRelationStatistics Valid=912, Invalid=5568, Unknown=0, NotChecked=0, Total=6480 [2021-05-21 21:11:03,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2021-05-21 21:11:03,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 300. [2021-05-21 21:11:03,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.5050167224080266) internal successors, (749), 299 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:03,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 749 transitions. [2021-05-21 21:11:03,968 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 749 transitions. Word has length 25 [2021-05-21 21:11:03,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:03,968 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 749 transitions. [2021-05-21 21:11:03,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:03,968 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 749 transitions. [2021-05-21 21:11:03,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:11:03,969 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:03,969 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:04,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-21 21:11:04,184 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:04,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:04,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1682602555, now seen corresponding path program 33 times [2021-05-21 21:11:04,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:04,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527058847] [2021-05-21 21:11:04,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:04,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:04,296 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:04,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:04,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527058847] [2021-05-21 21:11:04,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527058847] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:04,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151188530] [2021-05-21 21:11:04,296 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 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 [2021-05-21 21:11:04,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-21 21:11:04,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:11:04,318 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-21 21:11:04,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:04,524 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:04,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151188530] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:04,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:04,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-05-21 21:11:04,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784190618] [2021-05-21 21:11:04,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-21 21:11:04,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:04,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-21 21:11:04,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-05-21 21:11:04,526 INFO L87 Difference]: Start difference. First operand 300 states and 749 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:05,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:05,553 INFO L93 Difference]: Finished difference Result 499 states and 1080 transitions. [2021-05-21 21:11:05,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-21 21:11:05,554 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:11:05,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:05,555 INFO L225 Difference]: With dead ends: 499 [2021-05-21 21:11:05,555 INFO L226 Difference]: Without dead ends: 478 [2021-05-21 21:11:05,555 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1249 ImplicationChecksByTransitivity, 972.4ms TimeCoverageRelationStatistics Valid=567, Invalid=3593, Unknown=0, NotChecked=0, Total=4160 [2021-05-21 21:11:05,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2021-05-21 21:11:05,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 294. [2021-05-21 21:11:05,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.5187713310580206) internal successors, (738), 293 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:05,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 738 transitions. [2021-05-21 21:11:05,559 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 738 transitions. Word has length 25 [2021-05-21 21:11:05,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:05,560 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 738 transitions. [2021-05-21 21:11:05,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:05,560 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 738 transitions. [2021-05-21 21:11:05,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:11:05,560 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:05,560 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:05,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-21 21:11:05,765 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:05,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:05,766 INFO L82 PathProgramCache]: Analyzing trace with hash 2077134939, now seen corresponding path program 34 times [2021-05-21 21:11:05,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:05,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310533800] [2021-05-21 21:11:05,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:05,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:05,864 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:05,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:05,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310533800] [2021-05-21 21:11:05,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310533800] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:05,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64345638] [2021-05-21 21:11:05,865 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 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 [2021-05-21 21:11:05,888 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:11:05,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:11:05,889 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-21 21:11:05,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:06,123 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:06,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64345638] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:06,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:06,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-05-21 21:11:06,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110415661] [2021-05-21 21:11:06,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-21 21:11:06,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:06,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-21 21:11:06,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-05-21 21:11:06,124 INFO L87 Difference]: Start difference. First operand 294 states and 738 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:06,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:06,871 INFO L93 Difference]: Finished difference Result 435 states and 957 transitions. [2021-05-21 21:11:06,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-21 21:11:06,871 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:11:06,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:06,872 INFO L225 Difference]: With dead ends: 435 [2021-05-21 21:11:06,872 INFO L226 Difference]: Without dead ends: 382 [2021-05-21 21:11:06,872 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 751.4ms TimeCoverageRelationStatistics Valid=406, Invalid=2350, Unknown=0, NotChecked=0, Total=2756 [2021-05-21 21:11:06,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-05-21 21:11:06,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 286. [2021-05-21 21:11:06,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.389473684210526) internal successors, (681), 285 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:06,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 681 transitions. [2021-05-21 21:11:06,876 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 681 transitions. Word has length 25 [2021-05-21 21:11:06,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:06,876 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 681 transitions. [2021-05-21 21:11:06,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:06,876 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 681 transitions. [2021-05-21 21:11:06,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:11:06,876 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:06,877 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:07,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-21 21:11:07,092 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:07,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:07,092 INFO L82 PathProgramCache]: Analyzing trace with hash 2090603063, now seen corresponding path program 35 times [2021-05-21 21:11:07,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:07,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328517223] [2021-05-21 21:11:07,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:07,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:07,195 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:07,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:07,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328517223] [2021-05-21 21:11:07,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328517223] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:07,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277850227] [2021-05-21 21:11:07,196 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 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 [2021-05-21 21:11:07,216 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-21 21:11:07,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:11:07,217 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-21 21:11:07,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:07,427 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:07,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277850227] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:07,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:07,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-05-21 21:11:07,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886563136] [2021-05-21 21:11:07,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-21 21:11:07,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:07,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-21 21:11:07,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-05-21 21:11:07,428 INFO L87 Difference]: Start difference. First operand 286 states and 681 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:08,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:08,390 INFO L93 Difference]: Finished difference Result 526 states and 1119 transitions. [2021-05-21 21:11:08,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-21 21:11:08,391 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:11:08,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:08,392 INFO L225 Difference]: With dead ends: 526 [2021-05-21 21:11:08,392 INFO L226 Difference]: Without dead ends: 447 [2021-05-21 21:11:08,392 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 871 ImplicationChecksByTransitivity, 882.6ms TimeCoverageRelationStatistics Valid=403, Invalid=2789, Unknown=0, NotChecked=0, Total=3192 [2021-05-21 21:11:08,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-05-21 21:11:08,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 326. [2021-05-21 21:11:08,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.3015384615384615) internal successors, (748), 325 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:08,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 748 transitions. [2021-05-21 21:11:08,396 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 748 transitions. Word has length 25 [2021-05-21 21:11:08,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:08,397 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 748 transitions. [2021-05-21 21:11:08,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:08,397 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 748 transitions. [2021-05-21 21:11:08,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:11:08,397 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:08,397 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:08,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:11:08,613 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:08,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:08,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1554295263, now seen corresponding path program 36 times [2021-05-21 21:11:08,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:08,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431267883] [2021-05-21 21:11:08,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:08,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:08,706 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:08,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:08,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431267883] [2021-05-21 21:11:08,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431267883] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:08,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540404041] [2021-05-21 21:11:08,707 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 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 [2021-05-21 21:11:08,727 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-21 21:11:08,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:11:08,727 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-21 21:11:08,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:08,934 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:08,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540404041] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:08,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:08,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-05-21 21:11:08,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266027757] [2021-05-21 21:11:08,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-21 21:11:08,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:08,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-21 21:11:08,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-05-21 21:11:08,935 INFO L87 Difference]: Start difference. First operand 326 states and 748 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:09,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:09,810 INFO L93 Difference]: Finished difference Result 471 states and 986 transitions. [2021-05-21 21:11:09,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-21 21:11:09,810 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:11:09,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:09,812 INFO L225 Difference]: With dead ends: 471 [2021-05-21 21:11:09,812 INFO L226 Difference]: Without dead ends: 441 [2021-05-21 21:11:09,812 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 874 ImplicationChecksByTransitivity, 867.9ms TimeCoverageRelationStatistics Valid=404, Invalid=2788, Unknown=0, NotChecked=0, Total=3192 [2021-05-21 21:11:09,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-05-21 21:11:09,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 285. [2021-05-21 21:11:09,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 2.3204225352112675) internal successors, (659), 284 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:09,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 659 transitions. [2021-05-21 21:11:09,816 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 659 transitions. Word has length 25 [2021-05-21 21:11:09,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:09,816 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 659 transitions. [2021-05-21 21:11:09,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:09,816 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 659 transitions. [2021-05-21 21:11:09,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:11:09,816 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:09,816 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:10,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-05-21 21:11:10,032 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:10,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:10,032 INFO L82 PathProgramCache]: Analyzing trace with hash 679812231, now seen corresponding path program 37 times [2021-05-21 21:11:10,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:10,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963981480] [2021-05-21 21:11:10,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:10,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:10,123 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:10,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:10,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963981480] [2021-05-21 21:11:10,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963981480] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:10,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624261759] [2021-05-21 21:11:10,124 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 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 [2021-05-21 21:11:10,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:10,144 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-21 21:11:10,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:10,358 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:10,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624261759] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:10,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:10,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-05-21 21:11:10,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659007266] [2021-05-21 21:11:10,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-21 21:11:10,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:10,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-21 21:11:10,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-05-21 21:11:10,359 INFO L87 Difference]: Start difference. First operand 285 states and 659 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:10,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:10,948 INFO L93 Difference]: Finished difference Result 371 states and 801 transitions. [2021-05-21 21:11:10,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-21 21:11:10,949 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:11:10,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:10,950 INFO L225 Difference]: With dead ends: 371 [2021-05-21 21:11:10,950 INFO L226 Difference]: Without dead ends: 357 [2021-05-21 21:11:10,950 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 603.1ms TimeCoverageRelationStatistics Valid=244, Invalid=1736, Unknown=0, NotChecked=0, Total=1980 [2021-05-21 21:11:10,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-05-21 21:11:10,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 289. [2021-05-21 21:11:10,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 2.3194444444444446) internal successors, (668), 288 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:10,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 668 transitions. [2021-05-21 21:11:10,953 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 668 transitions. Word has length 25 [2021-05-21 21:11:10,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:10,954 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 668 transitions. [2021-05-21 21:11:10,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:10,954 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 668 transitions. [2021-05-21 21:11:10,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:11:10,954 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:10,954 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:11,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-05-21 21:11:11,169 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:11,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:11,169 INFO L82 PathProgramCache]: Analyzing trace with hash -332880301, now seen corresponding path program 38 times [2021-05-21 21:11:11,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:11,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583981424] [2021-05-21 21:11:11,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:11,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:11,258 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:11,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:11,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583981424] [2021-05-21 21:11:11,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583981424] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:11,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747885837] [2021-05-21 21:11:11,258 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:11:11,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:11:11,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:11:11,279 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-21 21:11:11,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:11,516 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:11,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747885837] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:11,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:11,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-05-21 21:11:11,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899460023] [2021-05-21 21:11:11,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-21 21:11:11,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:11,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-21 21:11:11,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-05-21 21:11:11,517 INFO L87 Difference]: Start difference. First operand 289 states and 668 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:12,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:12,331 INFO L93 Difference]: Finished difference Result 434 states and 912 transitions. [2021-05-21 21:11:12,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-21 21:11:12,331 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:11:12,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:12,332 INFO L225 Difference]: With dead ends: 434 [2021-05-21 21:11:12,332 INFO L226 Difference]: Without dead ends: 413 [2021-05-21 21:11:12,333 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 916 ImplicationChecksByTransitivity, 827.3ms TimeCoverageRelationStatistics Valid=426, Invalid=2880, Unknown=0, NotChecked=0, Total=3306 [2021-05-21 21:11:12,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-05-21 21:11:12,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 289. [2021-05-21 21:11:12,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 2.3229166666666665) internal successors, (669), 288 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:12,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 669 transitions. [2021-05-21 21:11:12,336 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 669 transitions. Word has length 25 [2021-05-21 21:11:12,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:12,336 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 669 transitions. [2021-05-21 21:11:12,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:12,336 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 669 transitions. [2021-05-21 21:11:12,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:11:12,337 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:12,337 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:12,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:11:12,553 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:12,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:12,553 INFO L82 PathProgramCache]: Analyzing trace with hash -868110103, now seen corresponding path program 39 times [2021-05-21 21:11:12,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:12,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743886624] [2021-05-21 21:11:12,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:12,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:12,648 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:12,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:12,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743886624] [2021-05-21 21:11:12,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743886624] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:12,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338164845] [2021-05-21 21:11:12,648 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 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 [2021-05-21 21:11:12,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-21 21:11:12,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:11:12,675 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-21 21:11:12,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:12,891 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:12,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338164845] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:12,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:12,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-05-21 21:11:12,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779776933] [2021-05-21 21:11:12,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-21 21:11:12,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:12,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-21 21:11:12,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-05-21 21:11:12,892 INFO L87 Difference]: Start difference. First operand 289 states and 669 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:13,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:13,504 INFO L93 Difference]: Finished difference Result 408 states and 870 transitions. [2021-05-21 21:11:13,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-21 21:11:13,504 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:11:13,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:13,505 INFO L225 Difference]: With dead ends: 408 [2021-05-21 21:11:13,505 INFO L226 Difference]: Without dead ends: 355 [2021-05-21 21:11:13,505 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 640.5ms TimeCoverageRelationStatistics Valid=312, Invalid=1944, Unknown=0, NotChecked=0, Total=2256 [2021-05-21 21:11:13,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-05-21 21:11:13,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 281. [2021-05-21 21:11:13,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.307142857142857) internal successors, (646), 280 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:13,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 646 transitions. [2021-05-21 21:11:13,508 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 646 transitions. Word has length 25 [2021-05-21 21:11:13,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:13,508 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 646 transitions. [2021-05-21 21:11:13,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:13,509 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 646 transitions. [2021-05-21 21:11:13,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:11:13,509 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:13,509 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:13,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-05-21 21:11:13,725 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:13,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:13,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1839386049, now seen corresponding path program 40 times [2021-05-21 21:11:13,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:13,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224667283] [2021-05-21 21:11:13,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:13,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:13,900 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:13,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:13,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224667283] [2021-05-21 21:11:13,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224667283] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:13,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892470723] [2021-05-21 21:11:13,900 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:11:13,921 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:11:13,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:11:13,921 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-21 21:11:13,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:14,210 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:14,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892470723] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:14,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:14,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-05-21 21:11:14,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709036191] [2021-05-21 21:11:14,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-21 21:11:14,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:14,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-21 21:11:14,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-05-21 21:11:14,211 INFO L87 Difference]: Start difference. First operand 281 states and 646 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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) [2021-05-21 21:11:16,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:16,318 INFO L93 Difference]: Finished difference Result 487 states and 1044 transitions. [2021-05-21 21:11:16,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-21 21:11:16,318 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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 25 [2021-05-21 21:11:16,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:16,319 INFO L225 Difference]: With dead ends: 487 [2021-05-21 21:11:16,319 INFO L226 Difference]: Without dead ends: 473 [2021-05-21 21:11:16,320 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1184 ImplicationChecksByTransitivity, 2040.1ms TimeCoverageRelationStatistics Valid=612, Invalid=3294, Unknown=0, NotChecked=0, Total=3906 [2021-05-21 21:11:16,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-05-21 21:11:16,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 299. [2021-05-21 21:11:16,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 2.291946308724832) internal successors, (683), 298 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:16,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 683 transitions. [2021-05-21 21:11:16,323 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 683 transitions. Word has length 25 [2021-05-21 21:11:16,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:16,324 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 683 transitions. [2021-05-21 21:11:16,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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) [2021-05-21 21:11:16,324 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 683 transitions. [2021-05-21 21:11:16,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:11:16,324 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:16,324 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:16,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:11:16,525 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:16,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:16,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1319395975, now seen corresponding path program 41 times [2021-05-21 21:11:16,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:16,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458852979] [2021-05-21 21:11:16,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:16,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:16,672 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:16,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:16,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458852979] [2021-05-21 21:11:16,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458852979] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:16,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942240374] [2021-05-21 21:11:16,673 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 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 [2021-05-21 21:11:16,693 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 21:11:16,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:11:16,693 WARN L261 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-21 21:11:16,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:16,951 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:16,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942240374] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:16,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:16,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-05-21 21:11:16,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576807105] [2021-05-21 21:11:16,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-21 21:11:16,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:16,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-21 21:11:16,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-05-21 21:11:16,952 INFO L87 Difference]: Start difference. First operand 299 states and 683 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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) [2021-05-21 21:11:19,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:19,186 INFO L93 Difference]: Finished difference Result 516 states and 1115 transitions. [2021-05-21 21:11:19,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-21 21:11:19,186 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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 25 [2021-05-21 21:11:19,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:19,188 INFO L225 Difference]: With dead ends: 516 [2021-05-21 21:11:19,188 INFO L226 Difference]: Without dead ends: 502 [2021-05-21 21:11:19,188 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1424 ImplicationChecksByTransitivity, 2159.2ms TimeCoverageRelationStatistics Valid=763, Invalid=3793, Unknown=0, NotChecked=0, Total=4556 [2021-05-21 21:11:19,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-05-21 21:11:19,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 301. [2021-05-21 21:11:19,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.3) internal successors, (690), 300 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:19,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 690 transitions. [2021-05-21 21:11:19,192 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 690 transitions. Word has length 25 [2021-05-21 21:11:19,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:19,192 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 690 transitions. [2021-05-21 21:11:19,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 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) [2021-05-21 21:11:19,192 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 690 transitions. [2021-05-21 21:11:19,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:11:19,193 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:19,193 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:19,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-05-21 21:11:19,408 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:19,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:19,408 INFO L82 PathProgramCache]: Analyzing trace with hash 857611235, now seen corresponding path program 42 times [2021-05-21 21:11:19,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:19,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177706577] [2021-05-21 21:11:19,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:19,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:19,580 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:19,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:19,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177706577] [2021-05-21 21:11:19,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177706577] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:19,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605451056] [2021-05-21 21:11:19,580 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-21 21:11:19,612 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 21:11:19,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:11:19,613 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-21 21:11:19,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:11:19,866 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:19,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605451056] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:19,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:19,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-05-21 21:11:19,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431897563] [2021-05-21 21:11:19,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-21 21:11:19,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:19,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-21 21:11:19,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2021-05-21 21:11:19,867 INFO L87 Difference]: Start difference. First operand 301 states and 690 transitions. Second operand has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:20,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:20,931 INFO L93 Difference]: Finished difference Result 558 states and 1181 transitions. [2021-05-21 21:11:20,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-21 21:11:20,931 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-21 21:11:20,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:20,932 INFO L225 Difference]: With dead ends: 558 [2021-05-21 21:11:20,932 INFO L226 Difference]: Without dead ends: 509 [2021-05-21 21:11:20,933 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1231 ImplicationChecksByTransitivity, 1158.6ms TimeCoverageRelationStatistics Valid=566, Invalid=3724, Unknown=0, NotChecked=0, Total=4290 [2021-05-21 21:11:20,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-05-21 21:11:20,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 367. [2021-05-21 21:11:20,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 2.3524590163934427) internal successors, (861), 366 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:20,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 861 transitions. [2021-05-21 21:11:20,937 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 861 transitions. Word has length 27 [2021-05-21 21:11:20,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:20,938 INFO L482 AbstractCegarLoop]: Abstraction has 367 states and 861 transitions. [2021-05-21 21:11:20,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:20,938 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 861 transitions. [2021-05-21 21:11:20,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:11:20,938 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:20,938 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:21,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:11:21,154 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:21,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:21,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1087323029, now seen corresponding path program 43 times [2021-05-21 21:11:21,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:21,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628585333] [2021-05-21 21:11:21,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:21,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:21,304 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:21,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:21,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628585333] [2021-05-21 21:11:21,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628585333] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:21,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599019148] [2021-05-21 21:11:21,304 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:11:21,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:21,324 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-21 21:11:21,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:21,578 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:21,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599019148] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:21,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:21,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-21 21:11:21,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851687412] [2021-05-21 21:11:21,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-21 21:11:21,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:21,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-21 21:11:21,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2021-05-21 21:11:21,579 INFO L87 Difference]: Start difference. First operand 367 states and 861 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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) [2021-05-21 21:11:22,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:22,811 INFO L93 Difference]: Finished difference Result 582 states and 1226 transitions. [2021-05-21 21:11:22,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-21 21:11:22,811 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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 27 [2021-05-21 21:11:22,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:22,812 INFO L225 Difference]: With dead ends: 582 [2021-05-21 21:11:22,812 INFO L226 Difference]: Without dead ends: 544 [2021-05-21 21:11:22,813 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1435 ImplicationChecksByTransitivity, 1195.9ms TimeCoverageRelationStatistics Valid=636, Invalid=4194, Unknown=0, NotChecked=0, Total=4830 [2021-05-21 21:11:22,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-05-21 21:11:22,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 370. [2021-05-21 21:11:22,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 2.3495934959349594) internal successors, (867), 369 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:22,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 867 transitions. [2021-05-21 21:11:22,817 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 867 transitions. Word has length 27 [2021-05-21 21:11:22,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:22,818 INFO L482 AbstractCegarLoop]: Abstraction has 370 states and 867 transitions. [2021-05-21 21:11:22,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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) [2021-05-21 21:11:22,818 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 867 transitions. [2021-05-21 21:11:22,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:11:22,818 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:22,818 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:23,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-05-21 21:11:23,029 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:23,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:23,029 INFO L82 PathProgramCache]: Analyzing trace with hash -254898513, now seen corresponding path program 44 times [2021-05-21 21:11:23,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:23,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741469443] [2021-05-21 21:11:23,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:23,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:23,188 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:23,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:23,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741469443] [2021-05-21 21:11:23,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741469443] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:23,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522035621] [2021-05-21 21:11:23,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 21:11:23,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:11:23,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:11:23,209 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-21 21:11:23,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:23,441 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:23,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522035621] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:23,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:23,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-21 21:11:23,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522647113] [2021-05-21 21:11:23,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-21 21:11:23,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:23,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-21 21:11:23,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2021-05-21 21:11:23,442 INFO L87 Difference]: Start difference. First operand 370 states and 867 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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) [2021-05-21 21:11:24,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:24,947 INFO L93 Difference]: Finished difference Result 675 states and 1384 transitions. [2021-05-21 21:11:24,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-21 21:11:24,947 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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 27 [2021-05-21 21:11:24,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:24,949 INFO L225 Difference]: With dead ends: 675 [2021-05-21 21:11:24,949 INFO L226 Difference]: Without dead ends: 636 [2021-05-21 21:11:24,949 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1664 ImplicationChecksByTransitivity, 1357.1ms TimeCoverageRelationStatistics Valid=733, Invalid=4817, Unknown=0, NotChecked=0, Total=5550 [2021-05-21 21:11:24,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-05-21 21:11:24,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 376. [2021-05-21 21:11:24,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 2.3573333333333335) internal successors, (884), 375 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:24,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 884 transitions. [2021-05-21 21:11:24,954 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 884 transitions. Word has length 27 [2021-05-21 21:11:24,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:24,954 INFO L482 AbstractCegarLoop]: Abstraction has 376 states and 884 transitions. [2021-05-21 21:11:24,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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) [2021-05-21 21:11:24,954 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 884 transitions. [2021-05-21 21:11:24,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:11:24,955 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:24,955 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:25,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-05-21 21:11:25,169 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:25,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:25,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1519826373, now seen corresponding path program 45 times [2021-05-21 21:11:25,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:25,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248699312] [2021-05-21 21:11:25,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:25,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:25,329 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:25,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:25,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248699312] [2021-05-21 21:11:25,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248699312] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:25,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825846070] [2021-05-21 21:11:25,330 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 [2021-05-21 21:11:25,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 21:11:25,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:11:25,351 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-21 21:11:25,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:25,674 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:25,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825846070] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:25,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:25,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-21 21:11:25,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933206686] [2021-05-21 21:11:25,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-21 21:11:25,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:25,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-21 21:11:25,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2021-05-21 21:11:25,675 INFO L87 Difference]: Start difference. First operand 376 states and 884 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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) [2021-05-21 21:11:27,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:27,237 INFO L93 Difference]: Finished difference Result 647 states and 1333 transitions. [2021-05-21 21:11:27,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-21 21:11:27,238 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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 27 [2021-05-21 21:11:27,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:27,239 INFO L225 Difference]: With dead ends: 647 [2021-05-21 21:11:27,239 INFO L226 Difference]: Without dead ends: 620 [2021-05-21 21:11:27,240 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1553 ImplicationChecksByTransitivity, 1481.8ms TimeCoverageRelationStatistics Valid=718, Invalid=4684, Unknown=0, NotChecked=0, Total=5402 [2021-05-21 21:11:27,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2021-05-21 21:11:27,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 389. [2021-05-21 21:11:27,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 2.3556701030927836) internal successors, (914), 388 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:27,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 914 transitions. [2021-05-21 21:11:27,245 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 914 transitions. Word has length 27 [2021-05-21 21:11:27,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:27,245 INFO L482 AbstractCegarLoop]: Abstraction has 389 states and 914 transitions. [2021-05-21 21:11:27,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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) [2021-05-21 21:11:27,245 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 914 transitions. [2021-05-21 21:11:27,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:11:27,245 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:27,245 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:27,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:11:27,461 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:27,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:27,461 INFO L82 PathProgramCache]: Analyzing trace with hash -383641101, now seen corresponding path program 46 times [2021-05-21 21:11:27,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:27,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096891332] [2021-05-21 21:11:27,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:27,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:27,611 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:27,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:27,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096891332] [2021-05-21 21:11:27,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096891332] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:27,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606333706] [2021-05-21 21:11:27,612 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 [2021-05-21 21:11:27,633 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:11:27,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:11:27,633 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-21 21:11:27,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:27,866 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:27,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606333706] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:27,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:27,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-21 21:11:27,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505222546] [2021-05-21 21:11:27,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-21 21:11:27,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:27,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-21 21:11:27,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-05-21 21:11:27,867 INFO L87 Difference]: Start difference. First operand 389 states and 914 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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) [2021-05-21 21:11:29,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:29,310 INFO L93 Difference]: Finished difference Result 665 states and 1367 transitions. [2021-05-21 21:11:29,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-21 21:11:29,310 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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 27 [2021-05-21 21:11:29,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:29,312 INFO L225 Difference]: With dead ends: 665 [2021-05-21 21:11:29,312 INFO L226 Difference]: Without dead ends: 641 [2021-05-21 21:11:29,312 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1522 ImplicationChecksByTransitivity, 1264.7ms TimeCoverageRelationStatistics Valid=763, Invalid=4349, Unknown=0, NotChecked=0, Total=5112 [2021-05-21 21:11:29,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2021-05-21 21:11:29,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 390. [2021-05-21 21:11:29,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 2.3573264781491003) internal successors, (917), 389 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:29,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 917 transitions. [2021-05-21 21:11:29,317 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 917 transitions. Word has length 27 [2021-05-21 21:11:29,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:29,317 INFO L482 AbstractCegarLoop]: Abstraction has 390 states and 917 transitions. [2021-05-21 21:11:29,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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) [2021-05-21 21:11:29,317 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 917 transitions. [2021-05-21 21:11:29,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:11:29,318 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:29,318 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:29,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-05-21 21:11:29,518 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:29,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:29,518 INFO L82 PathProgramCache]: Analyzing trace with hash 266427869, now seen corresponding path program 47 times [2021-05-21 21:11:29,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:29,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720783599] [2021-05-21 21:11:29,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:29,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:29,678 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:29,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:29,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720783599] [2021-05-21 21:11:29,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720783599] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:29,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088624393] [2021-05-21 21:11:29,678 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:11:29,701 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-21 21:11:29,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:11:29,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 21:11:29,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:30,006 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:30,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088624393] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:30,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:30,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-21 21:11:30,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382762550] [2021-05-21 21:11:30,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-21 21:11:30,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:30,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-21 21:11:30,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2021-05-21 21:11:30,007 INFO L87 Difference]: Start difference. First operand 390 states and 917 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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) [2021-05-21 21:11:32,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:32,069 INFO L93 Difference]: Finished difference Result 729 states and 1539 transitions. [2021-05-21 21:11:32,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-21 21:11:32,069 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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 27 [2021-05-21 21:11:32,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:32,071 INFO L225 Difference]: With dead ends: 729 [2021-05-21 21:11:32,071 INFO L226 Difference]: Without dead ends: 699 [2021-05-21 21:11:32,071 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1992 ImplicationChecksByTransitivity, 1916.0ms TimeCoverageRelationStatistics Valid=949, Invalid=5857, Unknown=0, NotChecked=0, Total=6806 [2021-05-21 21:11:32,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2021-05-21 21:11:32,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 414. [2021-05-21 21:11:32,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 2.358353510895884) internal successors, (974), 413 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:32,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 974 transitions. [2021-05-21 21:11:32,077 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 974 transitions. Word has length 27 [2021-05-21 21:11:32,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:32,077 INFO L482 AbstractCegarLoop]: Abstraction has 414 states and 974 transitions. [2021-05-21 21:11:32,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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) [2021-05-21 21:11:32,077 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 974 transitions. [2021-05-21 21:11:32,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:11:32,077 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:32,077 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:32,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:11:32,289 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:32,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:32,289 INFO L82 PathProgramCache]: Analyzing trace with hash 209025461, now seen corresponding path program 48 times [2021-05-21 21:11:32,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:32,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935105171] [2021-05-21 21:11:32,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:32,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:32,419 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:32,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:32,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935105171] [2021-05-21 21:11:32,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935105171] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:32,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907870707] [2021-05-21 21:11:32,419 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:11:32,443 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 21:11:32,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:11:32,444 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-21 21:11:32,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:32,688 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:32,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907870707] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:32,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:32,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-21 21:11:32,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949875046] [2021-05-21 21:11:32,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-21 21:11:32,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:32,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-21 21:11:32,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2021-05-21 21:11:32,689 INFO L87 Difference]: Start difference. First operand 414 states and 974 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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) [2021-05-21 21:11:34,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:34,551 INFO L93 Difference]: Finished difference Result 787 states and 1650 transitions. [2021-05-21 21:11:34,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-05-21 21:11:34,551 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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 27 [2021-05-21 21:11:34,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:34,553 INFO L225 Difference]: With dead ends: 787 [2021-05-21 21:11:34,553 INFO L226 Difference]: Without dead ends: 742 [2021-05-21 21:11:34,553 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2042 ImplicationChecksByTransitivity, 1740.3ms TimeCoverageRelationStatistics Valid=917, Invalid=5563, Unknown=0, NotChecked=0, Total=6480 [2021-05-21 21:11:34,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2021-05-21 21:11:34,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 468. [2021-05-21 21:11:34,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 467 states have (on average 2.3618843683083512) internal successors, (1103), 467 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:34,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 1103 transitions. [2021-05-21 21:11:34,559 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 1103 transitions. Word has length 27 [2021-05-21 21:11:34,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:34,559 INFO L482 AbstractCegarLoop]: Abstraction has 468 states and 1103 transitions. [2021-05-21 21:11:34,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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) [2021-05-21 21:11:34,559 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 1103 transitions. [2021-05-21 21:11:34,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:11:34,561 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:34,561 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:34,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-05-21 21:11:34,768 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:34,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:34,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1055902399, now seen corresponding path program 49 times [2021-05-21 21:11:34,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:34,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878255061] [2021-05-21 21:11:34,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:34,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:34,914 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:34,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:34,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878255061] [2021-05-21 21:11:34,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878255061] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:34,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554462352] [2021-05-21 21:11:34,915 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:11:34,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:34,936 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-21 21:11:34,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:35,165 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:35,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554462352] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:35,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:35,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-21 21:11:35,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869550577] [2021-05-21 21:11:35,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-21 21:11:35,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:35,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-21 21:11:35,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2021-05-21 21:11:35,166 INFO L87 Difference]: Start difference. First operand 468 states and 1103 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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) [2021-05-21 21:11:36,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:36,346 INFO L93 Difference]: Finished difference Result 716 states and 1520 transitions. [2021-05-21 21:11:36,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-21 21:11:36,346 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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 27 [2021-05-21 21:11:36,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:36,348 INFO L225 Difference]: With dead ends: 716 [2021-05-21 21:11:36,348 INFO L226 Difference]: Without dead ends: 689 [2021-05-21 21:11:36,348 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1194 ImplicationChecksByTransitivity, 1168.3ms TimeCoverageRelationStatistics Valid=600, Invalid=3432, Unknown=0, NotChecked=0, Total=4032 [2021-05-21 21:11:36,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2021-05-21 21:11:36,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 461. [2021-05-21 21:11:36,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 2.3304347826086955) internal successors, (1072), 460 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:36,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 1072 transitions. [2021-05-21 21:11:36,354 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 1072 transitions. Word has length 27 [2021-05-21 21:11:36,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:36,354 INFO L482 AbstractCegarLoop]: Abstraction has 461 states and 1072 transitions. [2021-05-21 21:11:36,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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) [2021-05-21 21:11:36,354 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 1072 transitions. [2021-05-21 21:11:36,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:11:36,355 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:36,355 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:36,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-05-21 21:11:36,565 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:36,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:36,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1174374461, now seen corresponding path program 50 times [2021-05-21 21:11:36,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:36,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012490198] [2021-05-21 21:11:36,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:36,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:36,701 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:36,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:36,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012490198] [2021-05-21 21:11:36,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012490198] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:36,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133480333] [2021-05-21 21:11:36,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-21 21:11:36,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:11:36,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:11:36,732 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-21 21:11:36,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:36,984 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:36,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133480333] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:36,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:36,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-21 21:11:36,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823298201] [2021-05-21 21:11:36,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-21 21:11:36,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:36,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-21 21:11:36,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2021-05-21 21:11:36,986 INFO L87 Difference]: Start difference. First operand 461 states and 1072 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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) [2021-05-21 21:11:38,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:38,432 INFO L93 Difference]: Finished difference Result 711 states and 1531 transitions. [2021-05-21 21:11:38,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-21 21:11:38,432 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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 27 [2021-05-21 21:11:38,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:38,434 INFO L225 Difference]: With dead ends: 711 [2021-05-21 21:11:38,434 INFO L226 Difference]: Without dead ends: 687 [2021-05-21 21:11:38,434 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1326 ImplicationChecksByTransitivity, 1351.7ms TimeCoverageRelationStatistics Valid=712, Invalid=3710, Unknown=0, NotChecked=0, Total=4422 [2021-05-21 21:11:38,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2021-05-21 21:11:38,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 484. [2021-05-21 21:11:38,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 2.3064182194616976) internal successors, (1114), 483 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:38,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 1114 transitions. [2021-05-21 21:11:38,439 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 1114 transitions. Word has length 27 [2021-05-21 21:11:38,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:38,439 INFO L482 AbstractCegarLoop]: Abstraction has 484 states and 1114 transitions. [2021-05-21 21:11:38,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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) [2021-05-21 21:11:38,440 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 1114 transitions. [2021-05-21 21:11:38,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:11:38,440 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:38,440 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:38,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-05-21 21:11:38,649 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:38,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:38,649 INFO L82 PathProgramCache]: Analyzing trace with hash -52082337, now seen corresponding path program 51 times [2021-05-21 21:11:38,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:38,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777945724] [2021-05-21 21:11:38,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:38,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:38,753 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:38,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:38,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777945724] [2021-05-21 21:11:38,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777945724] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:38,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256055267] [2021-05-21 21:11:38,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:11:38,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-21 21:11:38,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:11:38,774 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-21 21:11:38,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:39,010 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:39,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256055267] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:39,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:39,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-05-21 21:11:39,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374930856] [2021-05-21 21:11:39,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-21 21:11:39,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:39,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-21 21:11:39,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-05-21 21:11:39,011 INFO L87 Difference]: Start difference. First operand 484 states and 1114 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:40,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:40,175 INFO L93 Difference]: Finished difference Result 697 states and 1499 transitions. [2021-05-21 21:11:40,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-21 21:11:40,175 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-21 21:11:40,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:40,177 INFO L225 Difference]: With dead ends: 697 [2021-05-21 21:11:40,177 INFO L226 Difference]: Without dead ends: 672 [2021-05-21 21:11:40,177 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1352 ImplicationChecksByTransitivity, 1086.9ms TimeCoverageRelationStatistics Valid=617, Invalid=3805, Unknown=0, NotChecked=0, Total=4422 [2021-05-21 21:11:40,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-05-21 21:11:40,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 448. [2021-05-21 21:11:40,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 447 states have (on average 2.250559284116331) internal successors, (1006), 447 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:40,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 1006 transitions. [2021-05-21 21:11:40,182 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 1006 transitions. Word has length 27 [2021-05-21 21:11:40,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:40,182 INFO L482 AbstractCegarLoop]: Abstraction has 448 states and 1006 transitions. [2021-05-21 21:11:40,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:40,182 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 1006 transitions. [2021-05-21 21:11:40,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:11:40,183 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:40,183 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:40,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-05-21 21:11:40,397 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:40,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:40,397 INFO L82 PathProgramCache]: Analyzing trace with hash -2112942139, now seen corresponding path program 52 times [2021-05-21 21:11:40,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:40,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98521473] [2021-05-21 21:11:40,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:40,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:40,494 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:40,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:40,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98521473] [2021-05-21 21:11:40,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98521473] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:40,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601891135] [2021-05-21 21:11:40,494 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 21:11:40,525 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:11:40,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:11:40,525 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-21 21:11:40,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:40,764 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:40,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601891135] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:40,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:40,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-05-21 21:11:40,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786935327] [2021-05-21 21:11:40,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-21 21:11:40,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:40,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-21 21:11:40,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-05-21 21:11:40,765 INFO L87 Difference]: Start difference. First operand 448 states and 1006 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:41,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:41,558 INFO L93 Difference]: Finished difference Result 644 states and 1380 transitions. [2021-05-21 21:11:41,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-21 21:11:41,559 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-21 21:11:41,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:41,560 INFO L225 Difference]: With dead ends: 644 [2021-05-21 21:11:41,560 INFO L226 Difference]: Without dead ends: 630 [2021-05-21 21:11:41,561 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 813.4ms TimeCoverageRelationStatistics Valid=406, Invalid=2674, Unknown=0, NotChecked=0, Total=3080 [2021-05-21 21:11:41,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2021-05-21 21:11:41,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 493. [2021-05-21 21:11:41,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 2.252032520325203) internal successors, (1108), 492 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:41,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 1108 transitions. [2021-05-21 21:11:41,565 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 1108 transitions. Word has length 27 [2021-05-21 21:11:41,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:41,566 INFO L482 AbstractCegarLoop]: Abstraction has 493 states and 1108 transitions. [2021-05-21 21:11:41,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:41,566 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 1108 transitions. [2021-05-21 21:11:41,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:11:41,566 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:41,566 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:41,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:11:41,767 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:41,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:41,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1169332625, now seen corresponding path program 53 times [2021-05-21 21:11:41,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:41,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494224912] [2021-05-21 21:11:41,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:41,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:41,865 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:41,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:41,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494224912] [2021-05-21 21:11:41,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494224912] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:41,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290045000] [2021-05-21 21:11:41,865 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:11:41,888 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-21 21:11:41,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:11:41,889 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-21 21:11:41,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:42,118 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:42,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290045000] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:42,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:42,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-05-21 21:11:42,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087561742] [2021-05-21 21:11:42,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-21 21:11:42,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:42,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-21 21:11:42,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-05-21 21:11:42,119 INFO L87 Difference]: Start difference. First operand 493 states and 1108 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:43,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:43,027 INFO L93 Difference]: Finished difference Result 666 states and 1417 transitions. [2021-05-21 21:11:43,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-21 21:11:43,027 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-21 21:11:43,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:43,028 INFO L225 Difference]: With dead ends: 666 [2021-05-21 21:11:43,029 INFO L226 Difference]: Without dead ends: 627 [2021-05-21 21:11:43,029 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1129 ImplicationChecksByTransitivity, 913.3ms TimeCoverageRelationStatistics Valid=547, Invalid=3235, Unknown=0, NotChecked=0, Total=3782 [2021-05-21 21:11:43,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2021-05-21 21:11:43,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 451. [2021-05-21 21:11:43,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 450 states have (on average 2.2355555555555555) internal successors, (1006), 450 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:43,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 1006 transitions. [2021-05-21 21:11:43,034 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 1006 transitions. Word has length 27 [2021-05-21 21:11:43,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:43,034 INFO L482 AbstractCegarLoop]: Abstraction has 451 states and 1006 transitions. [2021-05-21 21:11:43,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:43,034 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 1006 transitions. [2021-05-21 21:11:43,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:11:43,034 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:43,034 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:43,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-05-21 21:11:43,235 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:43,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:43,235 INFO L82 PathProgramCache]: Analyzing trace with hash 634102823, now seen corresponding path program 54 times [2021-05-21 21:11:43,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:43,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70288487] [2021-05-21 21:11:43,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:43,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:43,340 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:43,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:43,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70288487] [2021-05-21 21:11:43,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70288487] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:43,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358799564] [2021-05-21 21:11:43,341 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:11:43,367 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-21 21:11:43,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:11:43,367 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-21 21:11:43,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:43,610 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:43,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358799564] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:43,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:43,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-05-21 21:11:43,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385500596] [2021-05-21 21:11:43,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-21 21:11:43,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:43,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-21 21:11:43,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-05-21 21:11:43,611 INFO L87 Difference]: Start difference. First operand 451 states and 1006 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:44,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:44,236 INFO L93 Difference]: Finished difference Result 558 states and 1193 transitions. [2021-05-21 21:11:44,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-21 21:11:44,237 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-21 21:11:44,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:44,238 INFO L225 Difference]: With dead ends: 558 [2021-05-21 21:11:44,238 INFO L226 Difference]: Without dead ends: 520 [2021-05-21 21:11:44,238 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 678.3ms TimeCoverageRelationStatistics Valid=356, Invalid=1996, Unknown=0, NotChecked=0, Total=2352 [2021-05-21 21:11:44,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-05-21 21:11:44,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 427. [2021-05-21 21:11:44,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 2.1338028169014085) internal successors, (909), 426 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:44,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 909 transitions. [2021-05-21 21:11:44,242 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 909 transitions. Word has length 27 [2021-05-21 21:11:44,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:44,242 INFO L482 AbstractCegarLoop]: Abstraction has 427 states and 909 transitions. [2021-05-21 21:11:44,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:44,242 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 909 transitions. [2021-05-21 21:11:44,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:11:44,243 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:44,243 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:44,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:11:44,449 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:44,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:44,449 INFO L82 PathProgramCache]: Analyzing trace with hash 177512313, now seen corresponding path program 55 times [2021-05-21 21:11:44,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:44,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271828209] [2021-05-21 21:11:44,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:44,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:44,599 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:44,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:44,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271828209] [2021-05-21 21:11:44,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271828209] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:44,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978690048] [2021-05-21 21:11:44,600 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:11:44,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:44,622 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-21 21:11:44,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:44,841 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:44,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978690048] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:44,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:44,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-21 21:11:44,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106745082] [2021-05-21 21:11:44,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-21 21:11:44,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:44,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-21 21:11:44,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2021-05-21 21:11:44,842 INFO L87 Difference]: Start difference. First operand 427 states and 909 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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) [2021-05-21 21:11:46,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:46,273 INFO L93 Difference]: Finished difference Result 575 states and 1167 transitions. [2021-05-21 21:11:46,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-21 21:11:46,273 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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 27 [2021-05-21 21:11:46,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:46,274 INFO L225 Difference]: With dead ends: 575 [2021-05-21 21:11:46,274 INFO L226 Difference]: Without dead ends: 558 [2021-05-21 21:11:46,275 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1488 ImplicationChecksByTransitivity, 1395.1ms TimeCoverageRelationStatistics Valid=739, Invalid=4091, Unknown=0, NotChecked=0, Total=4830 [2021-05-21 21:11:46,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-05-21 21:11:46,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 341. [2021-05-21 21:11:46,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 2.126470588235294) internal successors, (723), 340 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:46,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 723 transitions. [2021-05-21 21:11:46,278 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 723 transitions. Word has length 27 [2021-05-21 21:11:46,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:46,279 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 723 transitions. [2021-05-21 21:11:46,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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) [2021-05-21 21:11:46,279 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 723 transitions. [2021-05-21 21:11:46,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-21 21:11:46,279 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:46,279 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:46,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:11:46,481 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:46,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:46,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1680806143, now seen corresponding path program 56 times [2021-05-21 21:11:46,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:46,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070350652] [2021-05-21 21:11:46,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:46,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:46,515 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:11:46,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:46,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070350652] [2021-05-21 21:11:46,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070350652] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:46,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122633717] [2021-05-21 21:11:46,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:11:46,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:11:46,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:11:46,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:11:46,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:46,572 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:11:46,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122633717] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:46,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:46,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-05-21 21:11:46,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421042582] [2021-05-21 21:11:46,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 21:11:46,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:46,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 21:11:46,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:11:46,573 INFO L87 Difference]: Start difference. First operand 341 states and 723 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:46,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:46,627 INFO L93 Difference]: Finished difference Result 501 states and 1034 transitions. [2021-05-21 21:11:46,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 21:11:46,628 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-21 21:11:46,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:46,628 INFO L225 Difference]: With dead ends: 501 [2021-05-21 21:11:46,628 INFO L226 Difference]: Without dead ends: 468 [2021-05-21 21:11:46,628 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 43.3ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:11:46,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-05-21 21:11:46,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 314. [2021-05-21 21:11:46,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 2.121405750798722) internal successors, (664), 313 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:46,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 664 transitions. [2021-05-21 21:11:46,632 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 664 transitions. Word has length 27 [2021-05-21 21:11:46,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:46,632 INFO L482 AbstractCegarLoop]: Abstraction has 314 states and 664 transitions. [2021-05-21 21:11:46,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:46,632 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 664 transitions. [2021-05-21 21:11:46,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 21:11:46,632 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:46,632 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:46,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:11:46,833 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:46,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:46,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1310861107, now seen corresponding path program 57 times [2021-05-21 21:11:46,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:46,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576349485] [2021-05-21 21:11:46,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:46,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:46,965 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:46,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:46,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576349485] [2021-05-21 21:11:46,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576349485] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:46,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618197743] [2021-05-21 21:11:46,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:11:46,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-21 21:11:46,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:11:46,988 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-21 21:11:46,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:47,248 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:47,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618197743] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:47,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:47,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-05-21 21:11:47,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776603091] [2021-05-21 21:11:47,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-21 21:11:47,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:47,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-21 21:11:47,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2021-05-21 21:11:47,249 INFO L87 Difference]: Start difference. First operand 314 states and 664 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 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) [2021-05-21 21:11:48,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:48,310 INFO L93 Difference]: Finished difference Result 613 states and 1226 transitions. [2021-05-21 21:11:48,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-21 21:11:48,310 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 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 29 [2021-05-21 21:11:48,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:48,311 INFO L225 Difference]: With dead ends: 613 [2021-05-21 21:11:48,311 INFO L226 Difference]: Without dead ends: 585 [2021-05-21 21:11:48,311 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1268 ImplicationChecksByTransitivity, 1028.4ms TimeCoverageRelationStatistics Valid=632, Invalid=3924, Unknown=0, NotChecked=0, Total=4556 [2021-05-21 21:11:48,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-05-21 21:11:48,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 333. [2021-05-21 21:11:48,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 2.1204819277108435) internal successors, (704), 332 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:48,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 704 transitions. [2021-05-21 21:11:48,315 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 704 transitions. Word has length 29 [2021-05-21 21:11:48,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:48,315 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 704 transitions. [2021-05-21 21:11:48,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 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) [2021-05-21 21:11:48,315 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 704 transitions. [2021-05-21 21:11:48,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 21:11:48,315 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:48,316 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:48,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:11:48,516 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:48,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:48,516 INFO L82 PathProgramCache]: Analyzing trace with hash 75290793, now seen corresponding path program 58 times [2021-05-21 21:11:48,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:48,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484703756] [2021-05-21 21:11:48,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:48,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:48,622 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:48,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:48,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484703756] [2021-05-21 21:11:48,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484703756] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:48,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421484046] [2021-05-21 21:11:48,623 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 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 [2021-05-21 21:11:48,643 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:11:48,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:11:48,644 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-21 21:11:48,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:48,929 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:48,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421484046] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:48,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:48,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2021-05-21 21:11:48,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85304287] [2021-05-21 21:11:48,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-21 21:11:48,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:48,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-21 21:11:48,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2021-05-21 21:11:48,930 INFO L87 Difference]: Start difference. First operand 333 states and 704 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 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) [2021-05-21 21:11:50,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:50,503 INFO L93 Difference]: Finished difference Result 809 states and 1602 transitions. [2021-05-21 21:11:50,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-05-21 21:11:50,503 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 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 29 [2021-05-21 21:11:50,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:50,504 INFO L225 Difference]: With dead ends: 809 [2021-05-21 21:11:50,504 INFO L226 Difference]: Without dead ends: 761 [2021-05-21 21:11:50,505 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2202 ImplicationChecksByTransitivity, 1398.7ms TimeCoverageRelationStatistics Valid=866, Invalid=6106, Unknown=0, NotChecked=0, Total=6972 [2021-05-21 21:11:50,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2021-05-21 21:11:50,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 437. [2021-05-21 21:11:50,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 436 states have (on average 2.1376146788990824) internal successors, (932), 436 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:50,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 932 transitions. [2021-05-21 21:11:50,510 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 932 transitions. Word has length 29 [2021-05-21 21:11:50,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:50,510 INFO L482 AbstractCegarLoop]: Abstraction has 437 states and 932 transitions. [2021-05-21 21:11:50,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 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) [2021-05-21 21:11:50,510 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 932 transitions. [2021-05-21 21:11:50,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 21:11:50,511 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:50,511 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:50,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-05-21 21:11:50,713 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:50,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:50,713 INFO L82 PathProgramCache]: Analyzing trace with hash -937401739, now seen corresponding path program 59 times [2021-05-21 21:11:50,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:50,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188188674] [2021-05-21 21:11:50,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:50,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:50,825 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:50,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:50,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188188674] [2021-05-21 21:11:50,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188188674] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:50,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664461268] [2021-05-21 21:11:50,826 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 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 [2021-05-21 21:11:50,848 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-21 21:11:50,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:11:50,849 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-21 21:11:50,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:51,135 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:51,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664461268] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:51,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:51,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2021-05-21 21:11:51,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665529385] [2021-05-21 21:11:51,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-21 21:11:51,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:51,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-21 21:11:51,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2021-05-21 21:11:51,137 INFO L87 Difference]: Start difference. First operand 437 states and 932 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 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) [2021-05-21 21:11:53,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:53,224 INFO L93 Difference]: Finished difference Result 994 states and 1975 transitions. [2021-05-21 21:11:53,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-05-21 21:11:53,224 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 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 29 [2021-05-21 21:11:53,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:53,225 INFO L225 Difference]: With dead ends: 994 [2021-05-21 21:11:53,225 INFO L226 Difference]: Without dead ends: 943 [2021-05-21 21:11:53,226 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3389 ImplicationChecksByTransitivity, 1825.9ms TimeCoverageRelationStatistics Valid=1250, Invalid=8452, Unknown=0, NotChecked=0, Total=9702 [2021-05-21 21:11:53,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2021-05-21 21:11:53,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 420. [2021-05-21 21:11:53,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 419 states have (on average 2.1408114558472553) internal successors, (897), 419 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:53,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 897 transitions. [2021-05-21 21:11:53,231 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 897 transitions. Word has length 29 [2021-05-21 21:11:53,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:53,231 INFO L482 AbstractCegarLoop]: Abstraction has 420 states and 897 transitions. [2021-05-21 21:11:53,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 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) [2021-05-21 21:11:53,231 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 897 transitions. [2021-05-21 21:11:53,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 21:11:53,240 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:53,240 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:53,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:11:53,445 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:53,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:53,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1615340429, now seen corresponding path program 60 times [2021-05-21 21:11:53,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:53,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397396809] [2021-05-21 21:11:53,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:53,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:53,576 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:53,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:53,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397396809] [2021-05-21 21:11:53,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397396809] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:53,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012539664] [2021-05-21 21:11:53,577 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 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 [2021-05-21 21:11:53,606 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-21 21:11:53,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:11:53,606 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-21 21:11:53,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:53,856 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:53,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012539664] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:53,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:53,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-05-21 21:11:53,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134115483] [2021-05-21 21:11:53,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-21 21:11:53,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:53,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-21 21:11:53,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-05-21 21:11:53,857 INFO L87 Difference]: Start difference. First operand 420 states and 897 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 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) [2021-05-21 21:11:54,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:54,980 INFO L93 Difference]: Finished difference Result 665 states and 1331 transitions. [2021-05-21 21:11:54,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-21 21:11:54,980 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 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 29 [2021-05-21 21:11:54,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:54,981 INFO L225 Difference]: With dead ends: 665 [2021-05-21 21:11:54,981 INFO L226 Difference]: Without dead ends: 618 [2021-05-21 21:11:54,981 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1129 ImplicationChecksByTransitivity, 1030.4ms TimeCoverageRelationStatistics Valid=543, Invalid=3489, Unknown=0, NotChecked=0, Total=4032 [2021-05-21 21:11:54,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2021-05-21 21:11:54,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 459. [2021-05-21 21:11:54,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 2.1397379912663754) internal successors, (980), 458 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:54,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 980 transitions. [2021-05-21 21:11:54,986 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 980 transitions. Word has length 29 [2021-05-21 21:11:54,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:54,986 INFO L482 AbstractCegarLoop]: Abstraction has 459 states and 980 transitions. [2021-05-21 21:11:54,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 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) [2021-05-21 21:11:54,986 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 980 transitions. [2021-05-21 21:11:54,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 21:11:54,986 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:54,987 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:55,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-05-21 21:11:55,187 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:55,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:55,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1666934335, now seen corresponding path program 61 times [2021-05-21 21:11:55,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:55,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236720134] [2021-05-21 21:11:55,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:55,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:55,310 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:55,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:55,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236720134] [2021-05-21 21:11:55,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236720134] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:55,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468805909] [2021-05-21 21:11:55,310 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 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 [2021-05-21 21:11:55,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:55,333 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-21 21:11:55,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:55,608 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:55,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468805909] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:55,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:55,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2021-05-21 21:11:55,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281074327] [2021-05-21 21:11:55,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-21 21:11:55,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:55,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-21 21:11:55,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2021-05-21 21:11:55,609 INFO L87 Difference]: Start difference. First operand 459 states and 980 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 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) [2021-05-21 21:11:57,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:57,123 INFO L93 Difference]: Finished difference Result 740 states and 1463 transitions. [2021-05-21 21:11:57,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-21 21:11:57,124 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 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 29 [2021-05-21 21:11:57,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:57,124 INFO L225 Difference]: With dead ends: 740 [2021-05-21 21:11:57,125 INFO L226 Difference]: Without dead ends: 683 [2021-05-21 21:11:57,125 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2071 ImplicationChecksByTransitivity, 1429.3ms TimeCoverageRelationStatistics Valid=756, Invalid=5886, Unknown=0, NotChecked=0, Total=6642 [2021-05-21 21:11:57,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2021-05-21 21:11:57,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 376. [2021-05-21 21:11:57,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 2.1413333333333333) internal successors, (803), 375 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:57,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 803 transitions. [2021-05-21 21:11:57,129 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 803 transitions. Word has length 29 [2021-05-21 21:11:57,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:57,129 INFO L482 AbstractCegarLoop]: Abstraction has 376 states and 803 transitions. [2021-05-21 21:11:57,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 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) [2021-05-21 21:11:57,130 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 803 transitions. [2021-05-21 21:11:57,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 21:11:57,130 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:57,130 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:57,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:11:57,331 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:57,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:57,331 INFO L82 PathProgramCache]: Analyzing trace with hash -303996619, now seen corresponding path program 62 times [2021-05-21 21:11:57,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:57,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635085246] [2021-05-21 21:11:57,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:57,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:57,524 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:57,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:57,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635085246] [2021-05-21 21:11:57,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635085246] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:57,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155726321] [2021-05-21 21:11:57,525 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 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 [2021-05-21 21:11:57,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:11:57,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:11:57,547 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-21 21:11:57,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:57,879 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:57,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155726321] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:57,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:57,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-05-21 21:11:57,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238263549] [2021-05-21 21:11:57,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-21 21:11:57,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:57,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-21 21:11:57,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2021-05-21 21:11:57,880 INFO L87 Difference]: Start difference. First operand 376 states and 803 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:01,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:12:01,648 INFO L93 Difference]: Finished difference Result 945 states and 1899 transitions. [2021-05-21 21:12:01,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-05-21 21:12:01,648 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-21 21:12:01,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:12:01,649 INFO L225 Difference]: With dead ends: 945 [2021-05-21 21:12:01,649 INFO L226 Difference]: Without dead ends: 901 [2021-05-21 21:12:01,650 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3241 ImplicationChecksByTransitivity, 3433.8ms TimeCoverageRelationStatistics Valid=1530, Invalid=7782, Unknown=0, NotChecked=0, Total=9312 [2021-05-21 21:12:01,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 901 states. [2021-05-21 21:12:01,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 901 to 438. [2021-05-21 21:12:01,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 2.1556064073226544) internal successors, (942), 437 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:01,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 942 transitions. [2021-05-21 21:12:01,656 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 942 transitions. Word has length 29 [2021-05-21 21:12:01,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:12:01,656 INFO L482 AbstractCegarLoop]: Abstraction has 438 states and 942 transitions. [2021-05-21 21:12:01,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:01,656 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 942 transitions. [2021-05-21 21:12:01,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 21:12:01,657 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:12:01,657 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:12:01,875 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:12:01,875 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:12:01,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:12:01,875 INFO L82 PathProgramCache]: Analyzing trace with hash 649114413, now seen corresponding path program 63 times [2021-05-21 21:12:01,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:12:01,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78193532] [2021-05-21 21:12:01,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:12:01,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:12:02,100 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:02,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:12:02,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78193532] [2021-05-21 21:12:02,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78193532] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:02,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361140834] [2021-05-21 21:12:02,101 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 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 [2021-05-21 21:12:02,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 21:12:02,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:12:02,129 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-21 21:12:02,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:12:02,395 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:02,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361140834] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:02,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:12:02,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 27 [2021-05-21 21:12:02,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105319847] [2021-05-21 21:12:02,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-21 21:12:02,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:12:02,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-21 21:12:02,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2021-05-21 21:12:02,396 INFO L87 Difference]: Start difference. First operand 438 states and 942 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 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) [2021-05-21 21:12:03,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:12:03,430 INFO L93 Difference]: Finished difference Result 599 states and 1229 transitions. [2021-05-21 21:12:03,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-21 21:12:03,431 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 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 29 [2021-05-21 21:12:03,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:12:03,431 INFO L225 Difference]: With dead ends: 599 [2021-05-21 21:12:03,431 INFO L226 Difference]: Without dead ends: 567 [2021-05-21 21:12:03,432 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 842 ImplicationChecksByTransitivity, 1066.0ms TimeCoverageRelationStatistics Valid=363, Invalid=2829, Unknown=0, NotChecked=0, Total=3192 [2021-05-21 21:12:03,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-05-21 21:12:03,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 431. [2021-05-21 21:12:03,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 2.1372093023255814) internal successors, (919), 430 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:03,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 919 transitions. [2021-05-21 21:12:03,436 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 919 transitions. Word has length 29 [2021-05-21 21:12:03,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:12:03,436 INFO L482 AbstractCegarLoop]: Abstraction has 431 states and 919 transitions. [2021-05-21 21:12:03,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 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) [2021-05-21 21:12:03,436 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 919 transitions. [2021-05-21 21:12:03,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 21:12:03,437 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:12:03,437 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:12:03,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:12:03,653 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:12:03,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:12:03,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1614463413, now seen corresponding path program 64 times [2021-05-21 21:12:03,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:12:03,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139386455] [2021-05-21 21:12:03,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:12:03,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:12:03,869 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:03,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:12:03,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139386455] [2021-05-21 21:12:03,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139386455] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:03,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655853119] [2021-05-21 21:12:03,870 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 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 [2021-05-21 21:12:03,892 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:12:03,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:12:03,893 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-21 21:12:03,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:12:04,252 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:04,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655853119] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:04,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:12:04,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-05-21 21:12:04,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246958160] [2021-05-21 21:12:04,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-21 21:12:04,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:12:04,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-21 21:12:04,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870 [2021-05-21 21:12:04,253 INFO L87 Difference]: Start difference. First operand 431 states and 919 transitions. Second operand has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 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) [2021-05-21 21:12:05,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:12:05,671 INFO L93 Difference]: Finished difference Result 661 states and 1333 transitions. [2021-05-21 21:12:05,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-21 21:12:05,671 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 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 29 [2021-05-21 21:12:05,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:12:05,672 INFO L225 Difference]: With dead ends: 661 [2021-05-21 21:12:05,672 INFO L226 Difference]: Without dead ends: 624 [2021-05-21 21:12:05,672 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1228 ImplicationChecksByTransitivity, 1433.6ms TimeCoverageRelationStatistics Valid=535, Invalid=3755, Unknown=0, NotChecked=0, Total=4290 [2021-05-21 21:12:05,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2021-05-21 21:12:05,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 362. [2021-05-21 21:12:05,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.155124653739612) internal successors, (778), 361 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:05,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 778 transitions. [2021-05-21 21:12:05,676 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 778 transitions. Word has length 29 [2021-05-21 21:12:05,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:12:05,676 INFO L482 AbstractCegarLoop]: Abstraction has 362 states and 778 transitions. [2021-05-21 21:12:05,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 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) [2021-05-21 21:12:05,676 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 778 transitions. [2021-05-21 21:12:05,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-21 21:12:05,677 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:12:05,677 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:12:05,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:12:05,877 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:12:05,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:12:05,877 INFO L82 PathProgramCache]: Analyzing trace with hash -184540877, now seen corresponding path program 65 times [2021-05-21 21:12:05,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:12:05,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664280555] [2021-05-21 21:12:05,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:12:05,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:12:05,995 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:05,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:12:05,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664280555] [2021-05-21 21:12:05,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664280555] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:05,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261249294] [2021-05-21 21:12:05,995 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:12:06,016 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-21 21:12:06,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:12:06,017 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-21 21:12:06,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:12:06,281 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:06,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261249294] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:06,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:12:06,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-05-21 21:12:06,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774244729] [2021-05-21 21:12:06,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-21 21:12:06,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:12:06,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-21 21:12:06,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-05-21 21:12:06,282 INFO L87 Difference]: Start difference. First operand 362 states and 778 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 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) [2021-05-21 21:12:07,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:12:07,567 INFO L93 Difference]: Finished difference Result 586 states and 1201 transitions. [2021-05-21 21:12:07,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-21 21:12:07,567 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 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 29 [2021-05-21 21:12:07,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:12:07,568 INFO L225 Difference]: With dead ends: 586 [2021-05-21 21:12:07,568 INFO L226 Difference]: Without dead ends: 559 [2021-05-21 21:12:07,568 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1754 ImplicationChecksByTransitivity, 1263.9ms TimeCoverageRelationStatistics Valid=767, Invalid=4783, Unknown=0, NotChecked=0, Total=5550 [2021-05-21 21:12:07,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-05-21 21:12:07,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 194. [2021-05-21 21:12:07,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.051813471502591) internal successors, (396), 193 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:07,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 396 transitions. [2021-05-21 21:12:07,571 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 396 transitions. Word has length 29 [2021-05-21 21:12:07,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:12:07,571 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 396 transitions. [2021-05-21 21:12:07,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 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) [2021-05-21 21:12:07,571 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 396 transitions. [2021-05-21 21:12:07,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-21 21:12:07,572 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:12:07,572 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:12:07,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-05-21 21:12:07,785 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:12:07,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:12:07,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1808436383, now seen corresponding path program 66 times [2021-05-21 21:12:07,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:12:07,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085766908] [2021-05-21 21:12:07,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:12:07,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:12:08,008 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:08,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:12:08,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085766908] [2021-05-21 21:12:08,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085766908] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:08,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577347678] [2021-05-21 21:12:08,009 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 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 [2021-05-21 21:12:08,034 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-21 21:12:08,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:12:08,034 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-21 21:12:08,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:12:08,406 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:08,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577347678] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:08,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:12:08,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-05-21 21:12:08,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168692581] [2021-05-21 21:12:08,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-21 21:12:08,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:12:08,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-21 21:12:08,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=870, Unknown=0, NotChecked=0, Total=992 [2021-05-21 21:12:08,407 INFO L87 Difference]: Start difference. First operand 194 states and 396 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-05-21 21:12:09,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:12:09,768 INFO L93 Difference]: Finished difference Result 469 states and 906 transitions. [2021-05-21 21:12:09,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-21 21:12:09,768 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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 31 [2021-05-21 21:12:09,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:12:09,769 INFO L225 Difference]: With dead ends: 469 [2021-05-21 21:12:09,769 INFO L226 Difference]: Without dead ends: 414 [2021-05-21 21:12:09,769 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1645 ImplicationChecksByTransitivity, 1500.5ms TimeCoverageRelationStatistics Valid=731, Invalid=4969, Unknown=0, NotChecked=0, Total=5700 [2021-05-21 21:12:09,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-05-21 21:12:09,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 248. [2021-05-21 21:12:09,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.1214574898785425) internal successors, (524), 247 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:09,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 524 transitions. [2021-05-21 21:12:09,773 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 524 transitions. Word has length 31 [2021-05-21 21:12:09,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:12:09,773 INFO L482 AbstractCegarLoop]: Abstraction has 248 states and 524 transitions. [2021-05-21 21:12:09,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-05-21 21:12:09,773 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 524 transitions. [2021-05-21 21:12:09,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-21 21:12:09,773 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:12:09,773 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:12:09,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-05-21 21:12:09,976 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:12:09,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:12:09,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1037382439, now seen corresponding path program 67 times [2021-05-21 21:12:09,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:12:09,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792963027] [2021-05-21 21:12:09,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:12:09,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:12:10,192 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:10,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:12:10,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792963027] [2021-05-21 21:12:10,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792963027] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:10,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343012361] [2021-05-21 21:12:10,192 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 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 [2021-05-21 21:12:10,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:12:10,214 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-21 21:12:10,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:12:10,499 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:10,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343012361] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:10,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:12:10,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-05-21 21:12:10,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433908914] [2021-05-21 21:12:10,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-21 21:12:10,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:12:10,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-21 21:12:10,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2021-05-21 21:12:10,500 INFO L87 Difference]: Start difference. First operand 248 states and 524 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) 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) [2021-05-21 21:12:11,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:12:11,946 INFO L93 Difference]: Finished difference Result 489 states and 939 transitions. [2021-05-21 21:12:11,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-21 21:12:11,946 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) 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 31 [2021-05-21 21:12:11,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:12:11,947 INFO L225 Difference]: With dead ends: 489 [2021-05-21 21:12:11,947 INFO L226 Difference]: Without dead ends: 445 [2021-05-21 21:12:11,947 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1870 ImplicationChecksByTransitivity, 1493.3ms TimeCoverageRelationStatistics Valid=806, Invalid=5514, Unknown=0, NotChecked=0, Total=6320 [2021-05-21 21:12:11,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-05-21 21:12:11,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 250. [2021-05-21 21:12:11,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.1204819277108435) internal successors, (528), 249 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:11,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 528 transitions. [2021-05-21 21:12:11,950 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 528 transitions. Word has length 31 [2021-05-21 21:12:11,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:12:11,950 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 528 transitions. [2021-05-21 21:12:11,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) 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) [2021-05-21 21:12:11,950 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 528 transitions. [2021-05-21 21:12:11,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-21 21:12:11,951 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:12:11,951 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:12:12,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:12:12,151 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:12:12,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:12:12,151 INFO L82 PathProgramCache]: Analyzing trace with hash 2133425259, now seen corresponding path program 68 times [2021-05-21 21:12:12,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:12:12,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575632512] [2021-05-21 21:12:12,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:12:12,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:12:12,347 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:12,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:12:12,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575632512] [2021-05-21 21:12:12,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575632512] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:12,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388382792] [2021-05-21 21:12:12,347 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 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 [2021-05-21 21:12:12,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:12:12,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:12:12,370 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-21 21:12:12,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:12:12,652 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:12,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388382792] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:12,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:12:12,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-05-21 21:12:12,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528767161] [2021-05-21 21:12:12,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-21 21:12:12,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:12:12,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-21 21:12:12,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2021-05-21 21:12:12,653 INFO L87 Difference]: Start difference. First operand 250 states and 528 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) 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) [2021-05-21 21:12:14,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:12:14,303 INFO L93 Difference]: Finished difference Result 487 states and 937 transitions. [2021-05-21 21:12:14,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-05-21 21:12:14,303 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) 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 31 [2021-05-21 21:12:14,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:12:14,304 INFO L225 Difference]: With dead ends: 487 [2021-05-21 21:12:14,304 INFO L226 Difference]: Without dead ends: 449 [2021-05-21 21:12:14,304 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2155 ImplicationChecksByTransitivity, 1591.7ms TimeCoverageRelationStatistics Valid=903, Invalid=6237, Unknown=0, NotChecked=0, Total=7140 [2021-05-21 21:12:14,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-05-21 21:12:14,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 252. [2021-05-21 21:12:14,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.1195219123505975) internal successors, (532), 251 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:14,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 532 transitions. [2021-05-21 21:12:14,307 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 532 transitions. Word has length 31 [2021-05-21 21:12:14,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:12:14,307 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 532 transitions. [2021-05-21 21:12:14,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) 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) [2021-05-21 21:12:14,307 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 532 transitions. [2021-05-21 21:12:14,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-21 21:12:14,308 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:12:14,308 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:12:14,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:12:14,508 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:12:14,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:12:14,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1329117521, now seen corresponding path program 69 times [2021-05-21 21:12:14,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:12:14,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548466901] [2021-05-21 21:12:14,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:12:14,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:12:14,735 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:14,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:12:14,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548466901] [2021-05-21 21:12:14,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548466901] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:14,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440108384] [2021-05-21 21:12:14,735 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 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 [2021-05-21 21:12:14,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-21 21:12:14,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:12:14,760 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-21 21:12:14,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:12:15,051 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:15,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440108384] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:15,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:12:15,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-05-21 21:12:15,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881470419] [2021-05-21 21:12:15,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-21 21:12:15,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:12:15,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-21 21:12:15,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2021-05-21 21:12:15,052 INFO L87 Difference]: Start difference. First operand 252 states and 532 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) 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) [2021-05-21 21:12:16,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:12:16,919 INFO L93 Difference]: Finished difference Result 532 states and 1020 transitions. [2021-05-21 21:12:16,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-05-21 21:12:16,920 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) 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 31 [2021-05-21 21:12:16,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:12:16,920 INFO L225 Difference]: With dead ends: 532 [2021-05-21 21:12:16,920 INFO L226 Difference]: Without dead ends: 487 [2021-05-21 21:12:16,921 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2360 ImplicationChecksByTransitivity, 1842.0ms TimeCoverageRelationStatistics Valid=1015, Invalid=6817, Unknown=0, NotChecked=0, Total=7832 [2021-05-21 21:12:16,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-05-21 21:12:16,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 255. [2021-05-21 21:12:16,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 2.125984251968504) internal successors, (540), 254 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:16,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 540 transitions. [2021-05-21 21:12:16,927 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 540 transitions. Word has length 31 [2021-05-21 21:12:16,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:12:16,927 INFO L482 AbstractCegarLoop]: Abstraction has 255 states and 540 transitions. [2021-05-21 21:12:16,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) 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) [2021-05-21 21:12:16,927 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 540 transitions. [2021-05-21 21:12:16,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-21 21:12:16,927 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:12:16,927 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:12:17,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:12:17,128 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:12:17,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:12:17,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1700921915, now seen corresponding path program 70 times [2021-05-21 21:12:17,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:12:17,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472507901] [2021-05-21 21:12:17,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:12:17,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:12:17,370 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:17,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:12:17,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472507901] [2021-05-21 21:12:17,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472507901] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:17,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950709586] [2021-05-21 21:12:17,370 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 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 [2021-05-21 21:12:17,391 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:12:17,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:12:17,392 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-21 21:12:17,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:12:17,683 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:17,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950709586] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:17,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:12:17,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-05-21 21:12:17,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35840442] [2021-05-21 21:12:17,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-21 21:12:17,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:12:17,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-21 21:12:17,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2021-05-21 21:12:17,684 INFO L87 Difference]: Start difference. First operand 255 states and 540 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) 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) [2021-05-21 21:12:19,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:12:19,333 INFO L93 Difference]: Finished difference Result 465 states and 897 transitions. [2021-05-21 21:12:19,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-05-21 21:12:19,334 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) 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 31 [2021-05-21 21:12:19,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:12:19,334 INFO L225 Difference]: With dead ends: 465 [2021-05-21 21:12:19,334 INFO L226 Difference]: Without dead ends: 438 [2021-05-21 21:12:19,334 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1944 ImplicationChecksByTransitivity, 1673.7ms TimeCoverageRelationStatistics Valid=936, Invalid=5706, Unknown=0, NotChecked=0, Total=6642 [2021-05-21 21:12:19,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-05-21 21:12:19,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 255. [2021-05-21 21:12:19,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 2.125984251968504) internal successors, (540), 254 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:19,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 540 transitions. [2021-05-21 21:12:19,337 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 540 transitions. Word has length 31 [2021-05-21 21:12:19,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:12:19,337 INFO L482 AbstractCegarLoop]: Abstraction has 255 states and 540 transitions. [2021-05-21 21:12:19,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) 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) [2021-05-21 21:12:19,337 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 540 transitions. [2021-05-21 21:12:19,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-21 21:12:19,338 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:12:19,338 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:12:19,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-05-21 21:12:19,538 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:12:19,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:12:19,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1287765489, now seen corresponding path program 71 times [2021-05-21 21:12:19,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:12:19,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086916566] [2021-05-21 21:12:19,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:12:19,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:12:19,746 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:19,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:12:19,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086916566] [2021-05-21 21:12:19,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086916566] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:19,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900009825] [2021-05-21 21:12:19,747 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 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 [2021-05-21 21:12:19,770 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-21 21:12:19,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:12:19,770 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-21 21:12:19,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:12:20,077 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:20,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900009825] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:20,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:12:20,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-05-21 21:12:20,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284015239] [2021-05-21 21:12:20,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-21 21:12:20,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:12:20,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-21 21:12:20,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2021-05-21 21:12:20,078 INFO L87 Difference]: Start difference. First operand 255 states and 540 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) 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) [2021-05-21 21:12:21,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:12:21,529 INFO L93 Difference]: Finished difference Result 465 states and 901 transitions. [2021-05-21 21:12:21,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-21 21:12:21,529 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) 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 31 [2021-05-21 21:12:21,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:12:21,529 INFO L225 Difference]: With dead ends: 465 [2021-05-21 21:12:21,529 INFO L226 Difference]: Without dead ends: 427 [2021-05-21 21:12:21,530 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1892 ImplicationChecksByTransitivity, 1490.9ms TimeCoverageRelationStatistics Valid=752, Invalid=5568, Unknown=0, NotChecked=0, Total=6320 [2021-05-21 21:12:21,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-05-21 21:12:21,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 265. [2021-05-21 21:12:21,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.121212121212121) internal successors, (560), 264 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:21,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 560 transitions. [2021-05-21 21:12:21,532 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 560 transitions. Word has length 31 [2021-05-21 21:12:21,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:12:21,533 INFO L482 AbstractCegarLoop]: Abstraction has 265 states and 560 transitions. [2021-05-21 21:12:21,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) 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) [2021-05-21 21:12:21,533 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 560 transitions. [2021-05-21 21:12:21,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-21 21:12:21,533 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:12:21,533 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:12:21,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:12:21,736 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:12:21,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:12:21,737 INFO L82 PathProgramCache]: Analyzing trace with hash 2120190005, now seen corresponding path program 72 times [2021-05-21 21:12:21,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:12:21,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784072661] [2021-05-21 21:12:21,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:12:21,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:12:21,963 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:21,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:12:21,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784072661] [2021-05-21 21:12:21,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784072661] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:21,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921479643] [2021-05-21 21:12:21,963 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 [2021-05-21 21:12:21,985 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-21 21:12:21,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:12:21,986 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-21 21:12:21,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:12:22,278 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:22,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921479643] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:22,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:12:22,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-05-21 21:12:22,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91154912] [2021-05-21 21:12:22,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-21 21:12:22,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:12:22,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-21 21:12:22,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2021-05-21 21:12:22,279 INFO L87 Difference]: Start difference. First operand 265 states and 560 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) 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) [2021-05-21 21:12:23,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:12:23,991 INFO L93 Difference]: Finished difference Result 518 states and 999 transitions. [2021-05-21 21:12:23,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-05-21 21:12:23,992 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) 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 31 [2021-05-21 21:12:23,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:12:23,992 INFO L225 Difference]: With dead ends: 518 [2021-05-21 21:12:23,992 INFO L226 Difference]: Without dead ends: 473 [2021-05-21 21:12:23,993 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2091 ImplicationChecksByTransitivity, 1673.1ms TimeCoverageRelationStatistics Valid=876, Invalid=6096, Unknown=0, NotChecked=0, Total=6972 [2021-05-21 21:12:23,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-05-21 21:12:23,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 267. [2021-05-21 21:12:23,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 2.1240601503759398) internal successors, (565), 266 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:23,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 565 transitions. [2021-05-21 21:12:23,996 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 565 transitions. Word has length 31 [2021-05-21 21:12:23,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:12:23,996 INFO L482 AbstractCegarLoop]: Abstraction has 267 states and 565 transitions. [2021-05-21 21:12:23,996 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) 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) [2021-05-21 21:12:23,996 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 565 transitions. [2021-05-21 21:12:23,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-21 21:12:23,996 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:12:23,996 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:12:24,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:12:24,201 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:12:24,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:12:24,201 INFO L82 PathProgramCache]: Analyzing trace with hash 855262145, now seen corresponding path program 73 times [2021-05-21 21:12:24,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:12:24,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045041814] [2021-05-21 21:12:24,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:12:24,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:12:24,433 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:24,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:12:24,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045041814] [2021-05-21 21:12:24,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045041814] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:24,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568858940] [2021-05-21 21:12:24,433 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 [2021-05-21 21:12:24,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:12:24,455 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-21 21:12:24,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:12:24,749 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:24,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568858940] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:24,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:12:24,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-05-21 21:12:24,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042941145] [2021-05-21 21:12:24,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-21 21:12:24,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:12:24,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-21 21:12:24,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2021-05-21 21:12:24,750 INFO L87 Difference]: Start difference. First operand 267 states and 565 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) 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) [2021-05-21 21:12:26,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:12:26,383 INFO L93 Difference]: Finished difference Result 448 states and 878 transitions. [2021-05-21 21:12:26,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-21 21:12:26,383 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) 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 31 [2021-05-21 21:12:26,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:12:26,384 INFO L225 Difference]: With dead ends: 448 [2021-05-21 21:12:26,384 INFO L226 Difference]: Without dead ends: 428 [2021-05-21 21:12:26,384 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1702 ImplicationChecksByTransitivity, 1593.1ms TimeCoverageRelationStatistics Valid=808, Invalid=5044, Unknown=0, NotChecked=0, Total=5852 [2021-05-21 21:12:26,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-05-21 21:12:26,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 263. [2021-05-21 21:12:26,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.1068702290076335) internal successors, (552), 262 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:26,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 552 transitions. [2021-05-21 21:12:26,387 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 552 transitions. Word has length 31 [2021-05-21 21:12:26,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:12:26,387 INFO L482 AbstractCegarLoop]: Abstraction has 263 states and 552 transitions. [2021-05-21 21:12:26,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) 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) [2021-05-21 21:12:26,387 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 552 transitions. [2021-05-21 21:12:26,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-21 21:12:26,388 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:12:26,388 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:12:26,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:12:26,588 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:12:26,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:12:26,588 INFO L82 PathProgramCache]: Analyzing trace with hash 389420273, now seen corresponding path program 74 times [2021-05-21 21:12:26,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:12:26,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436686651] [2021-05-21 21:12:26,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:12:26,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:12:26,770 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:26,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:12:26,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436686651] [2021-05-21 21:12:26,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436686651] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:26,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398853816] [2021-05-21 21:12:26,771 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 [2021-05-21 21:12:26,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:12:26,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:12:26,797 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-21 21:12:26,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:12:27,093 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:27,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398853816] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:27,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:12:27,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-05-21 21:12:27,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031405344] [2021-05-21 21:12:27,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-21 21:12:27,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:12:27,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-21 21:12:27,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=803, Unknown=0, NotChecked=0, Total=930 [2021-05-21 21:12:27,094 INFO L87 Difference]: Start difference. First operand 263 states and 552 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) 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) [2021-05-21 21:12:29,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:12:29,005 INFO L93 Difference]: Finished difference Result 529 states and 1039 transitions. [2021-05-21 21:12:29,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-05-21 21:12:29,006 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) 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 31 [2021-05-21 21:12:29,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:12:29,006 INFO L225 Difference]: With dead ends: 529 [2021-05-21 21:12:29,006 INFO L226 Difference]: Without dead ends: 481 [2021-05-21 21:12:29,007 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2575 ImplicationChecksByTransitivity, 1898.0ms TimeCoverageRelationStatistics Valid=963, Invalid=7047, Unknown=0, NotChecked=0, Total=8010 [2021-05-21 21:12:29,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-05-21 21:12:29,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 276. [2021-05-21 21:12:29,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.1163636363636362) internal successors, (582), 275 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:29,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 582 transitions. [2021-05-21 21:12:29,009 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 582 transitions. Word has length 31 [2021-05-21 21:12:29,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:12:29,010 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 582 transitions. [2021-05-21 21:12:29,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) 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) [2021-05-21 21:12:29,010 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 582 transitions. [2021-05-21 21:12:29,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-21 21:12:29,010 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:12:29,010 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:12:29,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-05-21 21:12:29,210 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:12:29,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:12:29,211 INFO L82 PathProgramCache]: Analyzing trace with hash -875507587, now seen corresponding path program 75 times [2021-05-21 21:12:29,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:12:29,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881513762] [2021-05-21 21:12:29,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:12:29,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:12:29,379 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:29,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:12:29,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881513762] [2021-05-21 21:12:29,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881513762] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:29,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105615650] [2021-05-21 21:12:29,379 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 [2021-05-21 21:12:29,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-21 21:12:29,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:12:29,401 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-21 21:12:29,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:12:29,710 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:29,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105615650] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:29,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:12:29,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-05-21 21:12:29,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600498738] [2021-05-21 21:12:29,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-21 21:12:29,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:12:29,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-21 21:12:29,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2021-05-21 21:12:29,711 INFO L87 Difference]: Start difference. First operand 276 states and 582 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) 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) [2021-05-21 21:12:31,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:12:31,586 INFO L93 Difference]: Finished difference Result 518 states and 1018 transitions. [2021-05-21 21:12:31,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-05-21 21:12:31,587 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) 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 31 [2021-05-21 21:12:31,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:12:31,587 INFO L225 Difference]: With dead ends: 518 [2021-05-21 21:12:31,587 INFO L226 Difference]: Without dead ends: 484 [2021-05-21 21:12:31,588 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2155 ImplicationChecksByTransitivity, 1715.7ms TimeCoverageRelationStatistics Valid=909, Invalid=6063, Unknown=0, NotChecked=0, Total=6972 [2021-05-21 21:12:31,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-05-21 21:12:31,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 273. [2021-05-21 21:12:31,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 2.099264705882353) internal successors, (571), 272 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:31,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 571 transitions. [2021-05-21 21:12:31,591 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 571 transitions. Word has length 31 [2021-05-21 21:12:31,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:12:31,591 INFO L482 AbstractCegarLoop]: Abstraction has 273 states and 571 transitions. [2021-05-21 21:12:31,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) 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) [2021-05-21 21:12:31,591 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 571 transitions. [2021-05-21 21:12:31,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-21 21:12:31,591 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:12:31,591 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:12:31,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:12:31,807 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:12:31,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:12:31,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1413332923, now seen corresponding path program 76 times [2021-05-21 21:12:31,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:12:31,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780174180] [2021-05-21 21:12:31,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:12:31,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:12:32,001 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:32,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:12:32,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780174180] [2021-05-21 21:12:32,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780174180] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:32,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267717989] [2021-05-21 21:12:32,002 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 [2021-05-21 21:12:32,024 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:12:32,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:12:32,025 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-21 21:12:32,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:12:32,412 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:32,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267717989] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:32,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:12:32,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 27 [2021-05-21 21:12:32,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461391362] [2021-05-21 21:12:32,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-21 21:12:32,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:12:32,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-21 21:12:32,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2021-05-21 21:12:32,413 INFO L87 Difference]: Start difference. First operand 273 states and 571 transitions. Second operand has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:34,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:12:34,455 INFO L93 Difference]: Finished difference Result 473 states and 960 transitions. [2021-05-21 21:12:34,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-21 21:12:34,455 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-05-21 21:12:34,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:12:34,456 INFO L225 Difference]: With dead ends: 473 [2021-05-21 21:12:34,456 INFO L226 Difference]: Without dead ends: 447 [2021-05-21 21:12:34,456 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1547 ImplicationChecksByTransitivity, 1995.8ms TimeCoverageRelationStatistics Valid=655, Invalid=4315, Unknown=0, NotChecked=0, Total=4970 [2021-05-21 21:12:34,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-05-21 21:12:34,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 303. [2021-05-21 21:12:34,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.096026490066225) internal successors, (633), 302 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:34,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 633 transitions. [2021-05-21 21:12:34,459 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 633 transitions. Word has length 31 [2021-05-21 21:12:34,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:12:34,459 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 633 transitions. [2021-05-21 21:12:34,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:34,459 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 633 transitions. [2021-05-21 21:12:34,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 21:12:34,459 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:12:34,459 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:12:34,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-05-21 21:12:34,673 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:12:34,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:12:34,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1311105745, now seen corresponding path program 77 times [2021-05-21 21:12:34,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:12:34,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547018614] [2021-05-21 21:12:34,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:12:34,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:12:34,713 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-21 21:12:34,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:12:34,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547018614] [2021-05-21 21:12:34,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547018614] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:34,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915955882] [2021-05-21 21:12:34,714 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 [2021-05-21 21:12:34,742 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-21 21:12:34,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:12:34,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-21 21:12:34,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:12:34,787 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-21 21:12:34,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915955882] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:34,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:12:34,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-05-21 21:12:34,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664638163] [2021-05-21 21:12:34,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 21:12:34,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:12:34,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 21:12:34,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-21 21:12:34,788 INFO L87 Difference]: Start difference. First operand 303 states and 633 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:34,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:12:34,862 INFO L93 Difference]: Finished difference Result 483 states and 979 transitions. [2021-05-21 21:12:34,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 21:12:34,863 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-21 21:12:34,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:12:34,863 INFO L225 Difference]: With dead ends: 483 [2021-05-21 21:12:34,863 INFO L226 Difference]: Without dead ends: 444 [2021-05-21 21:12:34,863 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 56.9ms TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:12:34,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-05-21 21:12:34,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 310. [2021-05-21 21:12:34,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.0938511326860842) internal successors, (647), 309 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:34,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 647 transitions. [2021-05-21 21:12:34,866 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 647 transitions. Word has length 33 [2021-05-21 21:12:34,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:12:34,867 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 647 transitions. [2021-05-21 21:12:34,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:34,867 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 647 transitions. [2021-05-21 21:12:34,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 21:12:34,867 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:12:34,867 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:12:35,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-05-21 21:12:35,083 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:12:35,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:12:35,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1845552953, now seen corresponding path program 78 times [2021-05-21 21:12:35,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:12:35,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285451086] [2021-05-21 21:12:35,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:12:35,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:12:35,305 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:35,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:12:35,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285451086] [2021-05-21 21:12:35,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285451086] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:35,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626928121] [2021-05-21 21:12:35,305 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 [2021-05-21 21:12:35,329 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-21 21:12:35,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:12:35,330 WARN L261 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-21 21:12:35,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:12:35,721 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:35,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626928121] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:35,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:12:35,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-05-21 21:12:35,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508008022] [2021-05-21 21:12:35,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-21 21:12:35,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:12:35,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-21 21:12:35,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=871, Unknown=0, NotChecked=0, Total=992 [2021-05-21 21:12:35,722 INFO L87 Difference]: Start difference. First operand 310 states and 647 transitions. Second operand has 32 states, 32 states have (on average 1.96875) internal successors, (63), 31 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) [2021-05-21 21:12:40,271 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2021-05-21 21:12:40,503 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2021-05-21 21:12:42,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:12:42,341 INFO L93 Difference]: Finished difference Result 1038 states and 2060 transitions. [2021-05-21 21:12:42,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2021-05-21 21:12:42,341 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.96875) internal successors, (63), 31 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 33 [2021-05-21 21:12:42,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:12:42,343 INFO L225 Difference]: With dead ends: 1038 [2021-05-21 21:12:42,343 INFO L226 Difference]: Without dead ends: 976 [2021-05-21 21:12:42,343 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7650 ImplicationChecksByTransitivity, 6020.2ms TimeCoverageRelationStatistics Valid=2584, Invalid=18008, Unknown=0, NotChecked=0, Total=20592 [2021-05-21 21:12:42,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2021-05-21 21:12:42,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 386. [2021-05-21 21:12:42,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 2.109090909090909) internal successors, (812), 385 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:42,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 812 transitions. [2021-05-21 21:12:42,348 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 812 transitions. Word has length 33 [2021-05-21 21:12:42,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:12:42,348 INFO L482 AbstractCegarLoop]: Abstraction has 386 states and 812 transitions. [2021-05-21 21:12:42,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.96875) internal successors, (63), 31 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) [2021-05-21 21:12:42,348 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 812 transitions. [2021-05-21 21:12:42,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-21 21:12:42,348 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:12:42,349 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:12:42,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-05-21 21:12:42,553 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:12:42,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:12:42,553 INFO L82 PathProgramCache]: Analyzing trace with hash -360118039, now seen corresponding path program 79 times [2021-05-21 21:12:42,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:12:42,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951277133] [2021-05-21 21:12:42,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:12:42,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:12:42,759 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:12:42,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:12:42,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951277133] [2021-05-21 21:12:42,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951277133] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:42,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962289595] [2021-05-21 21:12:42,760 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 [2021-05-21 21:12:42,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:12:42,782 WARN L261 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-21 21:12:42,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:12:43,136 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:43,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962289595] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:43,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:12:43,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-05-21 21:12:43,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438022147] [2021-05-21 21:12:43,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-21 21:12:43,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:12:43,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-21 21:12:43,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2021-05-21 21:12:43,137 INFO L87 Difference]: Start difference. First operand 386 states and 812 transitions. Second operand has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 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) [2021-05-21 21:12:44,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:12:44,463 INFO L93 Difference]: Finished difference Result 583 states and 1174 transitions. [2021-05-21 21:12:44,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-21 21:12:44,464 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 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 33 [2021-05-21 21:12:44,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:12:44,464 INFO L225 Difference]: With dead ends: 583 [2021-05-21 21:12:44,465 INFO L226 Difference]: Without dead ends: 538 [2021-05-21 21:12:44,465 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1299 ImplicationChecksByTransitivity, 1258.1ms TimeCoverageRelationStatistics Valid=418, Invalid=4004, Unknown=0, NotChecked=0, Total=4422 [2021-05-21 21:12:44,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-05-21 21:12:44,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 349. [2021-05-21 21:12:44,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 2.103448275862069) internal successors, (732), 348 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:44,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 732 transitions. [2021-05-21 21:12:44,468 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 732 transitions. Word has length 33 [2021-05-21 21:12:44,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:12:44,468 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 732 transitions. [2021-05-21 21:12:44,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 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) [2021-05-21 21:12:44,468 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 732 transitions. [2021-05-21 21:12:44,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-21 21:12:44,469 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:12:44,469 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:12:44,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:12:44,679 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:12:44,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:12:44,680 INFO L82 PathProgramCache]: Analyzing trace with hash 569511771, now seen corresponding path program 80 times [2021-05-21 21:12:44,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:12:44,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357500699] [2021-05-21 21:12:44,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:12:44,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:12:44,898 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:44,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:12:44,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357500699] [2021-05-21 21:12:44,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357500699] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:44,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262385720] [2021-05-21 21:12:44,898 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 [2021-05-21 21:12:44,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:12:44,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:12:44,921 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-21 21:12:44,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:12:45,291 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:45,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262385720] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:45,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:12:45,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-05-21 21:12:45,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974871340] [2021-05-21 21:12:45,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-21 21:12:45,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:12:45,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-21 21:12:45,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1049, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 21:12:45,292 INFO L87 Difference]: Start difference. First operand 349 states and 732 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:46,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:12:46,878 INFO L93 Difference]: Finished difference Result 782 states and 1584 transitions. [2021-05-21 21:12:46,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-05-21 21:12:46,878 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-21 21:12:46,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:12:46,879 INFO L225 Difference]: With dead ends: 782 [2021-05-21 21:12:46,879 INFO L226 Difference]: Without dead ends: 721 [2021-05-21 21:12:46,880 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2050 ImplicationChecksByTransitivity, 1685.9ms TimeCoverageRelationStatistics Valid=913, Invalid=6227, Unknown=0, NotChecked=0, Total=7140 [2021-05-21 21:12:46,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2021-05-21 21:12:46,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 461. [2021-05-21 21:12:46,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 2.1869565217391305) internal successors, (1006), 460 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:46,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 1006 transitions. [2021-05-21 21:12:46,885 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 1006 transitions. Word has length 35 [2021-05-21 21:12:46,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:12:46,885 INFO L482 AbstractCegarLoop]: Abstraction has 461 states and 1006 transitions. [2021-05-21 21:12:46,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:46,885 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 1006 transitions. [2021-05-21 21:12:46,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-21 21:12:46,886 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:12:46,886 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:12:47,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:12:47,101 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:12:47,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:12:47,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1678953501, now seen corresponding path program 81 times [2021-05-21 21:12:47,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:12:47,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722588713] [2021-05-21 21:12:47,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:12:47,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:12:47,331 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:47,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:12:47,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722588713] [2021-05-21 21:12:47,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722588713] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:47,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906273417] [2021-05-21 21:12:47,331 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 [2021-05-21 21:12:47,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-21 21:12:47,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:12:47,356 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-21 21:12:47,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:12:47,694 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:47,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906273417] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:47,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:12:47,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-05-21 21:12:47,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359487714] [2021-05-21 21:12:47,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-21 21:12:47,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:12:47,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-21 21:12:47,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1053, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 21:12:47,695 INFO L87 Difference]: Start difference. First operand 461 states and 1006 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:49,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:12:49,392 INFO L93 Difference]: Finished difference Result 808 states and 1627 transitions. [2021-05-21 21:12:49,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-05-21 21:12:49,393 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-21 21:12:49,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:12:49,393 INFO L225 Difference]: With dead ends: 808 [2021-05-21 21:12:49,393 INFO L226 Difference]: Without dead ends: 758 [2021-05-21 21:12:49,394 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2375 ImplicationChecksByTransitivity, 1753.8ms TimeCoverageRelationStatistics Valid=997, Invalid=7013, Unknown=0, NotChecked=0, Total=8010 [2021-05-21 21:12:49,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2021-05-21 21:12:49,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 463. [2021-05-21 21:12:49,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 2.186147186147186) internal successors, (1010), 462 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:49,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 1010 transitions. [2021-05-21 21:12:49,399 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 1010 transitions. Word has length 35 [2021-05-21 21:12:49,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:12:49,399 INFO L482 AbstractCegarLoop]: Abstraction has 463 states and 1010 transitions. [2021-05-21 21:12:49,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:49,399 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 1010 transitions. [2021-05-21 21:12:49,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-21 21:12:49,400 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:12:49,400 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:12:49,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:12:49,600 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:12:49,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:12:49,600 INFO L82 PathProgramCache]: Analyzing trace with hash -648791001, now seen corresponding path program 82 times [2021-05-21 21:12:49,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:12:49,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184785181] [2021-05-21 21:12:49,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:12:49,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:12:49,842 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:49,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:12:49,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184785181] [2021-05-21 21:12:49,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184785181] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:49,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373082408] [2021-05-21 21:12:49,842 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 21:12:49,864 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:12:49,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:12:49,865 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-21 21:12:49,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:12:50,207 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:50,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373082408] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:50,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:12:50,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-05-21 21:12:50,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530252578] [2021-05-21 21:12:50,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-21 21:12:50,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:12:50,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-21 21:12:50,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1053, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 21:12:50,208 INFO L87 Difference]: Start difference. First operand 463 states and 1010 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:52,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:12:52,105 INFO L93 Difference]: Finished difference Result 806 states and 1625 transitions. [2021-05-21 21:12:52,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-05-21 21:12:52,106 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-21 21:12:52,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:12:52,106 INFO L225 Difference]: With dead ends: 806 [2021-05-21 21:12:52,106 INFO L226 Difference]: Without dead ends: 762 [2021-05-21 21:12:52,107 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2695 ImplicationChecksByTransitivity, 1861.8ms TimeCoverageRelationStatistics Valid=1094, Invalid=7836, Unknown=0, NotChecked=0, Total=8930 [2021-05-21 21:12:52,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2021-05-21 21:12:52,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 465. [2021-05-21 21:12:52,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 2.185344827586207) internal successors, (1014), 464 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:52,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 1014 transitions. [2021-05-21 21:12:52,112 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 1014 transitions. Word has length 35 [2021-05-21 21:12:52,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:12:52,112 INFO L482 AbstractCegarLoop]: Abstraction has 465 states and 1014 transitions. [2021-05-21 21:12:52,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:52,112 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 1014 transitions. [2021-05-21 21:12:52,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-21 21:12:52,113 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:12:52,113 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:12:52,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:12:52,313 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:12:52,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:12:52,313 INFO L82 PathProgramCache]: Analyzing trace with hash 447251819, now seen corresponding path program 83 times [2021-05-21 21:12:52,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:12:52,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473157238] [2021-05-21 21:12:52,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:12:52,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:12:52,540 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:52,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:12:52,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473157238] [2021-05-21 21:12:52,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473157238] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:52,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739604735] [2021-05-21 21:12:52,540 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 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 [2021-05-21 21:12:52,563 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-21 21:12:52,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:12:52,564 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-21 21:12:52,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:12:52,902 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:52,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739604735] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:52,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:12:52,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-05-21 21:12:52,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749907477] [2021-05-21 21:12:52,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-21 21:12:52,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:12:52,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-21 21:12:52,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1049, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 21:12:52,903 INFO L87 Difference]: Start difference. First operand 465 states and 1014 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:54,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:12:54,935 INFO L93 Difference]: Finished difference Result 806 states and 1627 transitions. [2021-05-21 21:12:54,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-05-21 21:12:54,936 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-21 21:12:54,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:12:54,936 INFO L225 Difference]: With dead ends: 806 [2021-05-21 21:12:54,936 INFO L226 Difference]: Without dead ends: 768 [2021-05-21 21:12:54,937 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3034 ImplicationChecksByTransitivity, 1965.7ms TimeCoverageRelationStatistics Valid=1216, Invalid=8684, Unknown=0, NotChecked=0, Total=9900 [2021-05-21 21:12:54,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2021-05-21 21:12:54,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 467. [2021-05-21 21:12:54,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 2.184549356223176) internal successors, (1018), 466 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:54,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 1018 transitions. [2021-05-21 21:12:54,942 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 1018 transitions. Word has length 35 [2021-05-21 21:12:54,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:12:54,942 INFO L482 AbstractCegarLoop]: Abstraction has 467 states and 1018 transitions. [2021-05-21 21:12:54,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:54,942 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 1018 transitions. [2021-05-21 21:12:54,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-21 21:12:54,942 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:12:54,942 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:12:55,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-05-21 21:12:55,143 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:12:55,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:12:55,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1279676335, now seen corresponding path program 84 times [2021-05-21 21:12:55,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:12:55,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306779262] [2021-05-21 21:12:55,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:12:55,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:12:55,397 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:55,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:12:55,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306779262] [2021-05-21 21:12:55,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306779262] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:55,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807136282] [2021-05-21 21:12:55,398 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 21:12:55,422 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-21 21:12:55,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:12:55,423 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-21 21:12:55,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:12:55,879 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:55,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807136282] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:55,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:12:55,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-05-21 21:12:55,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337665377] [2021-05-21 21:12:55,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-21 21:12:55,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:12:55,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-21 21:12:55,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1052, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 21:12:55,880 INFO L87 Difference]: Start difference. First operand 467 states and 1018 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:59,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:12:59,052 INFO L93 Difference]: Finished difference Result 865 states and 1736 transitions. [2021-05-21 21:12:59,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-05-21 21:12:59,052 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-21 21:12:59,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:12:59,053 INFO L225 Difference]: With dead ends: 865 [2021-05-21 21:12:59,053 INFO L226 Difference]: Without dead ends: 820 [2021-05-21 21:12:59,054 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3709 ImplicationChecksByTransitivity, 2816.0ms TimeCoverageRelationStatistics Valid=1448, Invalid=10984, Unknown=0, NotChecked=0, Total=12432 [2021-05-21 21:12:59,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2021-05-21 21:12:59,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 470. [2021-05-21 21:12:59,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 2.1876332622601278) internal successors, (1026), 469 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:59,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1026 transitions. [2021-05-21 21:12:59,059 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1026 transitions. Word has length 35 [2021-05-21 21:12:59,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:12:59,059 INFO L482 AbstractCegarLoop]: Abstraction has 470 states and 1026 transitions. [2021-05-21 21:12:59,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:59,059 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1026 transitions. [2021-05-21 21:12:59,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-21 21:12:59,060 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:12:59,060 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:12:59,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-05-21 21:12:59,275 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:12:59,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:12:59,275 INFO L82 PathProgramCache]: Analyzing trace with hash 14748475, now seen corresponding path program 85 times [2021-05-21 21:12:59,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:12:59,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006401914] [2021-05-21 21:12:59,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:12:59,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:12:59,539 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:59,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:12:59,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006401914] [2021-05-21 21:12:59,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006401914] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:59,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918718115] [2021-05-21 21:12:59,539 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 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 [2021-05-21 21:12:59,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:12:59,562 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-21 21:12:59,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:12:59,906 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:59,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918718115] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:59,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:12:59,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-05-21 21:12:59,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602866474] [2021-05-21 21:12:59,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-21 21:12:59,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:12:59,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-21 21:12:59,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1036, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 21:12:59,907 INFO L87 Difference]: Start difference. First operand 470 states and 1026 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:02,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:13:02,073 INFO L93 Difference]: Finished difference Result 746 states and 1501 transitions. [2021-05-21 21:13:02,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-05-21 21:13:02,073 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-21 21:13:02,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:13:02,074 INFO L225 Difference]: With dead ends: 746 [2021-05-21 21:13:02,074 INFO L226 Difference]: Without dead ends: 719 [2021-05-21 21:13:02,074 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2714 ImplicationChecksByTransitivity, 2028.5ms TimeCoverageRelationStatistics Valid=1253, Invalid=7867, Unknown=0, NotChecked=0, Total=9120 [2021-05-21 21:13:02,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2021-05-21 21:13:02,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 470. [2021-05-21 21:13:02,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 2.1876332622601278) internal successors, (1026), 469 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:02,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1026 transitions. [2021-05-21 21:13:02,079 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1026 transitions. Word has length 35 [2021-05-21 21:13:02,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:13:02,079 INFO L482 AbstractCegarLoop]: Abstraction has 470 states and 1026 transitions. [2021-05-21 21:13:02,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:02,079 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1026 transitions. [2021-05-21 21:13:02,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-21 21:13:02,079 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:13:02,080 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:13:02,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-05-21 21:13:02,280 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:13:02,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:13:02,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1579011027, now seen corresponding path program 86 times [2021-05-21 21:13:02,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:13:02,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998769758] [2021-05-21 21:13:02,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:13:02,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:13:02,493 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:13:02,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:13:02,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998769758] [2021-05-21 21:13:02,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998769758] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:13:02,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326984326] [2021-05-21 21:13:02,494 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 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 [2021-05-21 21:13:02,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:13:02,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:13:02,517 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-21 21:13:02,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:13:02,876 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:13:02,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326984326] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:13:02,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:13:02,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-05-21 21:13:02,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548941057] [2021-05-21 21:13:02,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-21 21:13:02,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:13:02,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-21 21:13:02,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 21:13:02,877 INFO L87 Difference]: Start difference. First operand 470 states and 1026 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:04,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:13:04,674 INFO L93 Difference]: Finished difference Result 776 states and 1568 transitions. [2021-05-21 21:13:04,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-05-21 21:13:04,674 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-21 21:13:04,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:13:04,675 INFO L225 Difference]: With dead ends: 776 [2021-05-21 21:13:04,675 INFO L226 Difference]: Without dead ends: 732 [2021-05-21 21:13:04,675 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2404 ImplicationChecksByTransitivity, 1727.8ms TimeCoverageRelationStatistics Valid=930, Invalid=7080, Unknown=0, NotChecked=0, Total=8010 [2021-05-21 21:13:04,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2021-05-21 21:13:04,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 476. [2021-05-21 21:13:04,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 2.185263157894737) internal successors, (1038), 475 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:04,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1038 transitions. [2021-05-21 21:13:04,680 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1038 transitions. Word has length 35 [2021-05-21 21:13:04,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:13:04,680 INFO L482 AbstractCegarLoop]: Abstraction has 476 states and 1038 transitions. [2021-05-21 21:13:04,680 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:04,680 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1038 transitions. [2021-05-21 21:13:04,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-21 21:13:04,681 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:13:04,681 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:13:04,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-05-21 21:13:04,894 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:13:04,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:13:04,894 INFO L82 PathProgramCache]: Analyzing trace with hash -482968207, now seen corresponding path program 87 times [2021-05-21 21:13:04,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:13:04,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747588934] [2021-05-21 21:13:04,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:13:04,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:13:05,110 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:13:05,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:13:05,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747588934] [2021-05-21 21:13:05,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747588934] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:13:05,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176119209] [2021-05-21 21:13:05,111 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 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 [2021-05-21 21:13:05,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-21 21:13:05,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:13:05,136 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-21 21:13:05,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:13:05,643 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:13:05,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176119209] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:13:05,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:13:05,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-05-21 21:13:05,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090683716] [2021-05-21 21:13:05,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-21 21:13:05,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:13:05,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-21 21:13:05,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1062, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 21:13:05,644 INFO L87 Difference]: Start difference. First operand 476 states and 1038 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:08,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:13:08,130 INFO L93 Difference]: Finished difference Result 777 states and 1580 transitions. [2021-05-21 21:13:08,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-05-21 21:13:08,130 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-21 21:13:08,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:13:08,131 INFO L225 Difference]: With dead ends: 777 [2021-05-21 21:13:08,131 INFO L226 Difference]: Without dead ends: 739 [2021-05-21 21:13:08,131 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2748 ImplicationChecksByTransitivity, 2333.1ms TimeCoverageRelationStatistics Valid=1089, Invalid=8613, Unknown=0, NotChecked=0, Total=9702 [2021-05-21 21:13:08,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2021-05-21 21:13:08,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 482. [2021-05-21 21:13:08,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 2.191268191268191) internal successors, (1054), 481 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:08,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1054 transitions. [2021-05-21 21:13:08,136 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1054 transitions. Word has length 35 [2021-05-21 21:13:08,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:13:08,136 INFO L482 AbstractCegarLoop]: Abstraction has 482 states and 1054 transitions. [2021-05-21 21:13:08,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:08,136 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1054 transitions. [2021-05-21 21:13:08,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-21 21:13:08,137 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:13:08,137 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:13:08,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-05-21 21:13:08,337 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:13:08,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:13:08,337 INFO L82 PathProgramCache]: Analyzing trace with hash 349456309, now seen corresponding path program 88 times [2021-05-21 21:13:08,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:13:08,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800806353] [2021-05-21 21:13:08,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:13:08,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:13:08,584 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:13:08,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:13:08,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800806353] [2021-05-21 21:13:08,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800806353] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:13:08,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730701270] [2021-05-21 21:13:08,584 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 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 [2021-05-21 21:13:08,606 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:13:08,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:13:08,607 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-21 21:13:08,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:13:08,955 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:13:08,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730701270] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:13:08,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:13:08,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-05-21 21:13:08,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660763106] [2021-05-21 21:13:08,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-21 21:13:08,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:13:08,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-21 21:13:08,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1031, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 21:13:08,956 INFO L87 Difference]: Start difference. First operand 482 states and 1054 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:11,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:13:11,093 INFO L93 Difference]: Finished difference Result 849 states and 1716 transitions. [2021-05-21 21:13:11,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-05-21 21:13:11,093 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-21 21:13:11,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:13:11,094 INFO L225 Difference]: With dead ends: 849 [2021-05-21 21:13:11,094 INFO L226 Difference]: Without dead ends: 804 [2021-05-21 21:13:11,094 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2952 ImplicationChecksByTransitivity, 2085.0ms TimeCoverageRelationStatistics Valid=1198, Invalid=8504, Unknown=0, NotChecked=0, Total=9702 [2021-05-21 21:13:11,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2021-05-21 21:13:11,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 486. [2021-05-21 21:13:11,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 2.195876288659794) internal successors, (1065), 485 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:11,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 1065 transitions. [2021-05-21 21:13:11,099 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 1065 transitions. Word has length 35 [2021-05-21 21:13:11,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:13:11,099 INFO L482 AbstractCegarLoop]: Abstraction has 486 states and 1065 transitions. [2021-05-21 21:13:11,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:11,099 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 1065 transitions. [2021-05-21 21:13:11,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-21 21:13:11,100 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:13:11,100 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:13:11,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:13:11,310 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:13:11,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:13:11,310 INFO L82 PathProgramCache]: Analyzing trace with hash -915471551, now seen corresponding path program 89 times [2021-05-21 21:13:11,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:13:11,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707197202] [2021-05-21 21:13:11,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:13:11,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:13:11,556 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:13:11,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:13:11,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707197202] [2021-05-21 21:13:11,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707197202] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:13:11,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118803215] [2021-05-21 21:13:11,557 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 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 [2021-05-21 21:13:11,579 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-21 21:13:11,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:13:11,580 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-21 21:13:11,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:13:11,923 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:13:11,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118803215] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:13:11,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:13:11,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-05-21 21:13:11,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026626073] [2021-05-21 21:13:11,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-21 21:13:11,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:13:11,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-21 21:13:11,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1029, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 21:13:11,924 INFO L87 Difference]: Start difference. First operand 486 states and 1065 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:13,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:13:13,940 INFO L93 Difference]: Finished difference Result 747 states and 1522 transitions. [2021-05-21 21:13:13,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-05-21 21:13:13,940 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-21 21:13:13,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:13:13,941 INFO L225 Difference]: With dead ends: 747 [2021-05-21 21:13:13,941 INFO L226 Difference]: Without dead ends: 720 [2021-05-21 21:13:13,941 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2494 ImplicationChecksByTransitivity, 1927.9ms TimeCoverageRelationStatistics Valid=1132, Invalid=7240, Unknown=0, NotChecked=0, Total=8372 [2021-05-21 21:13:13,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2021-05-21 21:13:13,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 388. [2021-05-21 21:13:13,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 2.13953488372093) internal successors, (828), 387 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:13,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 828 transitions. [2021-05-21 21:13:13,946 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 828 transitions. Word has length 35 [2021-05-21 21:13:13,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:13:13,946 INFO L482 AbstractCegarLoop]: Abstraction has 388 states and 828 transitions. [2021-05-21 21:13:13,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:13,946 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 828 transitions. [2021-05-21 21:13:13,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-21 21:13:13,946 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:13:13,946 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:13:14,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:13:14,147 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:13:14,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:13:14,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1600337107, now seen corresponding path program 90 times [2021-05-21 21:13:14,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:13:14,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545829503] [2021-05-21 21:13:14,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:13:14,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:13:14,360 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:13:14,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:13:14,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545829503] [2021-05-21 21:13:14,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545829503] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:13:14,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212126114] [2021-05-21 21:13:14,360 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 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 [2021-05-21 21:13:14,384 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-21 21:13:14,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:13:14,385 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-21 21:13:14,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:13:14,829 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:13:14,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212126114] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:13:14,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:13:14,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-05-21 21:13:14,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205535433] [2021-05-21 21:13:14,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-21 21:13:14,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:13:14,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-21 21:13:14,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1054, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 21:13:14,830 INFO L87 Difference]: Start difference. First operand 388 states and 828 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:17,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:13:17,135 INFO L93 Difference]: Finished difference Result 635 states and 1250 transitions. [2021-05-21 21:13:17,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-05-21 21:13:17,135 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-21 21:13:17,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:13:17,136 INFO L225 Difference]: With dead ends: 635 [2021-05-21 21:13:17,136 INFO L226 Difference]: Without dead ends: 597 [2021-05-21 21:13:17,136 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2768 ImplicationChecksByTransitivity, 2211.7ms TimeCoverageRelationStatistics Valid=1045, Invalid=8461, Unknown=0, NotChecked=0, Total=9506 [2021-05-21 21:13:17,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-05-21 21:13:17,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 392. [2021-05-21 21:13:17,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 2.1381074168797953) internal successors, (836), 391 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:17,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 836 transitions. [2021-05-21 21:13:17,140 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 836 transitions. Word has length 35 [2021-05-21 21:13:17,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:13:17,140 INFO L482 AbstractCegarLoop]: Abstraction has 392 states and 836 transitions. [2021-05-21 21:13:17,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:17,140 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 836 transitions. [2021-05-21 21:13:17,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-21 21:13:17,141 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:13:17,141 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:13:17,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:13:17,341 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:13:17,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:13:17,341 INFO L82 PathProgramCache]: Analyzing trace with hash -767912591, now seen corresponding path program 91 times [2021-05-21 21:13:17,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:13:17,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672051233] [2021-05-21 21:13:17,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:13:17,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:13:17,609 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:13:17,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:13:17,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672051233] [2021-05-21 21:13:17,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672051233] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:13:17,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555839160] [2021-05-21 21:13:17,609 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 21:13:17,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:13:17,631 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-21 21:13:17,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:13:17,978 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:13:17,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555839160] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:13:17,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:13:17,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-05-21 21:13:17,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029971787] [2021-05-21 21:13:17,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-21 21:13:17,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:13:17,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-21 21:13:17,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1029, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 21:13:17,979 INFO L87 Difference]: Start difference. First operand 392 states and 836 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:20,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:13:20,177 INFO L93 Difference]: Finished difference Result 700 states and 1368 transitions. [2021-05-21 21:13:20,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-05-21 21:13:20,178 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-21 21:13:20,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:13:20,178 INFO L225 Difference]: With dead ends: 700 [2021-05-21 21:13:20,178 INFO L226 Difference]: Without dead ends: 655 [2021-05-21 21:13:20,178 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3073 ImplicationChecksByTransitivity, 2095.4ms TimeCoverageRelationStatistics Valid=1195, Invalid=8705, Unknown=0, NotChecked=0, Total=9900 [2021-05-21 21:13:20,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2021-05-21 21:13:20,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 394. [2021-05-21 21:13:20,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 2.1399491094147582) internal successors, (841), 393 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:20,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 841 transitions. [2021-05-21 21:13:20,183 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 841 transitions. Word has length 35 [2021-05-21 21:13:20,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:13:20,183 INFO L482 AbstractCegarLoop]: Abstraction has 394 states and 841 transitions. [2021-05-21 21:13:20,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:20,183 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 841 transitions. [2021-05-21 21:13:20,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-21 21:13:20,183 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:13:20,183 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:13:20,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable154 [2021-05-21 21:13:20,384 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:13:20,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:13:20,384 INFO L82 PathProgramCache]: Analyzing trace with hash -2032840451, now seen corresponding path program 92 times [2021-05-21 21:13:20,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:13:20,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001830471] [2021-05-21 21:13:20,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:13:20,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:13:20,632 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:13:20,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:13:20,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001830471] [2021-05-21 21:13:20,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001830471] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:13:20,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930338221] [2021-05-21 21:13:20,632 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 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 [2021-05-21 21:13:20,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:13:20,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:13:20,656 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-21 21:13:20,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:13:21,014 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:13:21,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930338221] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:13:21,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:13:21,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-05-21 21:13:21,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590846960] [2021-05-21 21:13:21,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-21 21:13:21,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:13:21,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-21 21:13:21,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1027, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 21:13:21,015 INFO L87 Difference]: Start difference. First operand 394 states and 841 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:22,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:13:22,909 INFO L93 Difference]: Finished difference Result 618 states and 1227 transitions. [2021-05-21 21:13:22,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-21 21:13:22,909 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-21 21:13:22,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:13:22,910 INFO L225 Difference]: With dead ends: 618 [2021-05-21 21:13:22,910 INFO L226 Difference]: Without dead ends: 598 [2021-05-21 21:13:22,910 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2534 ImplicationChecksByTransitivity, 1937.6ms TimeCoverageRelationStatistics Valid=1118, Invalid=7254, Unknown=0, NotChecked=0, Total=8372 [2021-05-21 21:13:22,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-05-21 21:13:22,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 382. [2021-05-21 21:13:22,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 381 states have (on average 2.120734908136483) internal successors, (808), 381 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:22,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 808 transitions. [2021-05-21 21:13:22,914 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 808 transitions. Word has length 35 [2021-05-21 21:13:22,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:13:22,914 INFO L482 AbstractCegarLoop]: Abstraction has 382 states and 808 transitions. [2021-05-21 21:13:22,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:22,917 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 808 transitions. [2021-05-21 21:13:22,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-21 21:13:22,917 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:13:22,917 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:13:23,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-05-21 21:13:23,118 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:13:23,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:13:23,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1796284973, now seen corresponding path program 93 times [2021-05-21 21:13:23,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:13:23,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41720735] [2021-05-21 21:13:23,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:13:23,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:13:23,311 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:13:23,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:13:23,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41720735] [2021-05-21 21:13:23,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41720735] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:13:23,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583171732] [2021-05-21 21:13:23,312 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 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 [2021-05-21 21:13:23,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-21 21:13:23,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:13:23,343 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-21 21:13:23,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:13:23,714 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:13:23,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583171732] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:13:23,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:13:23,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-05-21 21:13:23,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545050052] [2021-05-21 21:13:23,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-21 21:13:23,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:13:23,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-21 21:13:23,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1020, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 21:13:23,715 INFO L87 Difference]: Start difference. First operand 382 states and 808 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:26,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:13:26,465 INFO L93 Difference]: Finished difference Result 714 states and 1421 transitions. [2021-05-21 21:13:26,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-05-21 21:13:26,465 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-21 21:13:26,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:13:26,466 INFO L225 Difference]: With dead ends: 714 [2021-05-21 21:13:26,466 INFO L226 Difference]: Without dead ends: 666 [2021-05-21 21:13:26,466 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4028 ImplicationChecksByTransitivity, 2579.7ms TimeCoverageRelationStatistics Valid=1422, Invalid=10568, Unknown=0, NotChecked=0, Total=11990 [2021-05-21 21:13:26,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2021-05-21 21:13:26,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 398. [2021-05-21 21:13:26,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.123425692695214) internal successors, (843), 397 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:26,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 843 transitions. [2021-05-21 21:13:26,470 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 843 transitions. Word has length 35 [2021-05-21 21:13:26,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:13:26,470 INFO L482 AbstractCegarLoop]: Abstraction has 398 states and 843 transitions. [2021-05-21 21:13:26,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:26,471 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 843 transitions. [2021-05-21 21:13:26,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-21 21:13:26,471 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:13:26,471 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:13:26,671 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-05-21 21:13:26,671 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:13:26,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:13:26,672 INFO L82 PathProgramCache]: Analyzing trace with hash 531357113, now seen corresponding path program 94 times [2021-05-21 21:13:26,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:13:26,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821842779] [2021-05-21 21:13:26,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:13:26,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:13:26,870 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:13:26,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:13:26,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821842779] [2021-05-21 21:13:26,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821842779] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:13:26,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165778960] [2021-05-21 21:13:26,871 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 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 [2021-05-21 21:13:26,893 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:13:26,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:13:26,893 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-21 21:13:26,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:13:27,241 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:13:27,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165778960] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:13:27,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:13:27,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-05-21 21:13:27,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922285518] [2021-05-21 21:13:27,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-21 21:13:27,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:13:27,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-21 21:13:27,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1010, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 21:13:27,242 INFO L87 Difference]: Start difference. First operand 398 states and 843 transitions. Second operand has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:29,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:13:29,669 INFO L93 Difference]: Finished difference Result 728 states and 1445 transitions. [2021-05-21 21:13:29,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-05-21 21:13:29,669 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-21 21:13:29,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:13:29,670 INFO L225 Difference]: With dead ends: 728 [2021-05-21 21:13:29,670 INFO L226 Difference]: Without dead ends: 687 [2021-05-21 21:13:29,670 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3098 ImplicationChecksByTransitivity, 2213.5ms TimeCoverageRelationStatistics Valid=1275, Invalid=8427, Unknown=0, NotChecked=0, Total=9702 [2021-05-21 21:13:29,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2021-05-21 21:13:29,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 365. [2021-05-21 21:13:29,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 2.0851648351648353) internal successors, (759), 364 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:29,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 759 transitions. [2021-05-21 21:13:29,674 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 759 transitions. Word has length 35 [2021-05-21 21:13:29,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:13:29,674 INFO L482 AbstractCegarLoop]: Abstraction has 365 states and 759 transitions. [2021-05-21 21:13:29,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:29,674 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 759 transitions. [2021-05-21 21:13:29,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-21 21:13:29,674 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:13:29,674 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:13:29,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:13:29,877 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:13:29,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:13:29,877 INFO L82 PathProgramCache]: Analyzing trace with hash 850528961, now seen corresponding path program 95 times [2021-05-21 21:13:29,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:13:29,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463472133] [2021-05-21 21:13:29,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:13:29,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:13:30,126 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:13:30,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:13:30,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463472133] [2021-05-21 21:13:30,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463472133] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:13:30,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846670724] [2021-05-21 21:13:30,126 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 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 [2021-05-21 21:13:30,150 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-21 21:13:30,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:13:30,151 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-21 21:13:30,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:13:30,642 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:13:30,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846670724] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:13:30,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:13:30,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 30 [2021-05-21 21:13:30,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516841703] [2021-05-21 21:13:30,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-21 21:13:30,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:13:30,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-21 21:13:30,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2021-05-21 21:13:30,643 INFO L87 Difference]: Start difference. First operand 365 states and 759 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) 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) [2021-05-21 21:13:34,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:13:34,120 INFO L93 Difference]: Finished difference Result 641 states and 1294 transitions. [2021-05-21 21:13:34,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-05-21 21:13:34,120 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) 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 35 [2021-05-21 21:13:34,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:13:34,120 INFO L225 Difference]: With dead ends: 641 [2021-05-21 21:13:34,121 INFO L226 Difference]: Without dead ends: 608 [2021-05-21 21:13:34,121 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3257 ImplicationChecksByTransitivity, 3256.3ms TimeCoverageRelationStatistics Valid=1181, Invalid=8325, Unknown=0, NotChecked=0, Total=9506 [2021-05-21 21:13:34,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-05-21 21:13:34,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 381. [2021-05-21 21:13:34,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 2.081578947368421) internal successors, (791), 380 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:34,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 791 transitions. [2021-05-21 21:13:34,125 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 791 transitions. Word has length 35 [2021-05-21 21:13:34,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:13:34,125 INFO L482 AbstractCegarLoop]: Abstraction has 381 states and 791 transitions. [2021-05-21 21:13:34,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) 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) [2021-05-21 21:13:34,125 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 791 transitions. [2021-05-21 21:13:34,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-21 21:13:34,125 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:13:34,125 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:13:34,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:13:34,328 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:13:34,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:13:34,329 INFO L82 PathProgramCache]: Analyzing trace with hash 72244865, now seen corresponding path program 96 times [2021-05-21 21:13:34,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:13:34,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773294592] [2021-05-21 21:13:34,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:13:34,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:13:34,640 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 43 [2021-05-21 21:13:34,760 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:13:34,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:13:34,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773294592] [2021-05-21 21:13:34,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773294592] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:13:34,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575190395] [2021-05-21 21:13:34,761 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:13:34,785 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-21 21:13:34,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:13:34,786 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 48 conjunts are in the unsatisfiable core [2021-05-21 21:13:34,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:13:35,181 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:13:35,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575190395] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:13:35,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:13:35,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2021-05-21 21:13:35,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484287682] [2021-05-21 21:13:35,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-21 21:13:35,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:13:35,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-21 21:13:35,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2021-05-21 21:13:35,182 INFO L87 Difference]: Start difference. First operand 381 states and 791 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:35,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:13:35,993 INFO L93 Difference]: Finished difference Result 540 states and 1106 transitions. [2021-05-21 21:13:35,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-21 21:13:35,993 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-21 21:13:35,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:13:35,994 INFO L225 Difference]: With dead ends: 540 [2021-05-21 21:13:35,994 INFO L226 Difference]: Without dead ends: 533 [2021-05-21 21:13:35,994 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 889.3ms TimeCoverageRelationStatistics Valid=138, Invalid=1194, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 21:13:35,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-05-21 21:13:35,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 385. [2021-05-21 21:13:35,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 2.0807291666666665) internal successors, (799), 384 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:35,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 799 transitions. [2021-05-21 21:13:35,998 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 799 transitions. Word has length 35 [2021-05-21 21:13:35,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:13:35,998 INFO L482 AbstractCegarLoop]: Abstraction has 385 states and 799 transitions. [2021-05-21 21:13:35,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:35,998 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 799 transitions. [2021-05-21 21:13:35,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 21:13:35,998 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:13:35,998 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:13:36,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable175 [2021-05-21 21:13:36,214 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:13:36,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:13:36,214 INFO L82 PathProgramCache]: Analyzing trace with hash 428848235, now seen corresponding path program 97 times [2021-05-21 21:13:36,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:13:36,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396114129] [2021-05-21 21:13:36,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:13:36,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:13:36,264 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-21 21:13:36,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:13:36,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396114129] [2021-05-21 21:13:36,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396114129] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:13:36,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875551399] [2021-05-21 21:13:36,264 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 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 [2021-05-21 21:13:36,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:13:36,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 21:13:36,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:13:36,337 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-21 21:13:36,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875551399] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:13:36,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:13:36,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-05-21 21:13:36,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253704863] [2021-05-21 21:13:36,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 21:13:36,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:13:36,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 21:13:36,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-21 21:13:36,338 INFO L87 Difference]: Start difference. First operand 385 states and 799 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:36,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:13:36,436 INFO L93 Difference]: Finished difference Result 609 states and 1226 transitions. [2021-05-21 21:13:36,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 21:13:36,437 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 21:13:36,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:13:36,437 INFO L225 Difference]: With dead ends: 609 [2021-05-21 21:13:36,437 INFO L226 Difference]: Without dead ends: 561 [2021-05-21 21:13:36,437 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 73.3ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:13:36,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-05-21 21:13:36,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 422. [2021-05-21 21:13:36,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 2.0855106888361044) internal successors, (878), 421 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:36,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 878 transitions. [2021-05-21 21:13:36,441 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 878 transitions. Word has length 37 [2021-05-21 21:13:36,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:13:36,441 INFO L482 AbstractCegarLoop]: Abstraction has 422 states and 878 transitions. [2021-05-21 21:13:36,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:36,441 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 878 transitions. [2021-05-21 21:13:36,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 21:13:36,442 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:13:36,442 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:13:36,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:13:36,642 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:13:36,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:13:36,643 INFO L82 PathProgramCache]: Analyzing trace with hash 807325429, now seen corresponding path program 98 times [2021-05-21 21:13:36,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:13:36,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35954921] [2021-05-21 21:13:36,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:13:36,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:13:36,918 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:13:36,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:13:36,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35954921] [2021-05-21 21:13:36,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35954921] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:13:36,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804638620] [2021-05-21 21:13:36,918 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 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 [2021-05-21 21:13:36,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:13:36,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:13:36,941 WARN L261 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-21 21:13:36,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:13:37,403 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:13:37,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804638620] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:13:37,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:13:37,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 35 [2021-05-21 21:13:37,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966865452] [2021-05-21 21:13:37,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-21 21:13:37,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:13:37,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-21 21:13:37,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1116, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 21:13:37,404 INFO L87 Difference]: Start difference. First operand 422 states and 878 transitions. Second operand has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:43,253 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 69 [2021-05-21 21:13:44,136 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 60 [2021-05-21 21:13:44,400 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 61 [2021-05-21 21:13:47,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:13:47,201 INFO L93 Difference]: Finished difference Result 1608 states and 3197 transitions. [2021-05-21 21:13:47,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 183 states. [2021-05-21 21:13:47,201 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 21:13:47,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:13:47,202 INFO L225 Difference]: With dead ends: 1608 [2021-05-21 21:13:47,203 INFO L226 Difference]: Without dead ends: 1540 [2021-05-21 21:13:47,204 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15558 ImplicationChecksByTransitivity, 8925.5ms TimeCoverageRelationStatistics Valid=4687, Invalid=33533, Unknown=0, NotChecked=0, Total=38220 [2021-05-21 21:13:47,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1540 states. [2021-05-21 21:13:47,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1540 to 585. [2021-05-21 21:13:47,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 584 states have (on average 2.1113013698630136) internal successors, (1233), 584 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:47,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 1233 transitions. [2021-05-21 21:13:47,219 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 1233 transitions. Word has length 37 [2021-05-21 21:13:47,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:13:47,219 INFO L482 AbstractCegarLoop]: Abstraction has 585 states and 1233 transitions. [2021-05-21 21:13:47,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:47,219 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 1233 transitions. [2021-05-21 21:13:47,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 21:13:47,221 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:13:47,221 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:13:47,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:13:47,436 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:13:47,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:13:47,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1398345563, now seen corresponding path program 99 times [2021-05-21 21:13:47,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:13:47,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427489133] [2021-05-21 21:13:47,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:13:47,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:13:47,692 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:13:47,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:13:47,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427489133] [2021-05-21 21:13:47,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427489133] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:13:47,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854336008] [2021-05-21 21:13:47,692 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 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 [2021-05-21 21:13:47,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-21 21:13:47,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:13:47,719 WARN L261 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-21 21:13:47,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:13:48,158 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:13:48,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854336008] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:13:48,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:13:48,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2021-05-21 21:13:48,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864279698] [2021-05-21 21:13:48,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-21 21:13:48,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:13:48,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-21 21:13:48,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1131, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 21:13:48,159 INFO L87 Difference]: Start difference. First operand 585 states and 1233 transitions. Second operand has 36 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:50,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:13:50,728 INFO L93 Difference]: Finished difference Result 965 states and 1949 transitions. [2021-05-21 21:13:50,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-05-21 21:13:50,728 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 21:13:50,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:13:50,729 INFO L225 Difference]: With dead ends: 965 [2021-05-21 21:13:50,729 INFO L226 Difference]: Without dead ends: 923 [2021-05-21 21:13:50,729 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2503 ImplicationChecksByTransitivity, 2099.3ms TimeCoverageRelationStatistics Valid=660, Invalid=7350, Unknown=0, NotChecked=0, Total=8010 [2021-05-21 21:13:50,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2021-05-21 21:13:50,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 576. [2021-05-21 21:13:50,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 575 states have (on average 2.1043478260869564) internal successors, (1210), 575 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:50,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 1210 transitions. [2021-05-21 21:13:50,734 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 1210 transitions. Word has length 37 [2021-05-21 21:13:50,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:13:50,735 INFO L482 AbstractCegarLoop]: Abstraction has 576 states and 1210 transitions. [2021-05-21 21:13:50,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:50,735 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 1210 transitions. [2021-05-21 21:13:50,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 21:13:50,735 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:13:50,735 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:13:50,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-05-21 21:13:50,936 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:13:50,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:13:50,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1584538635, now seen corresponding path program 100 times [2021-05-21 21:13:50,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:13:50,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996147993] [2021-05-21 21:13:50,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:13:50,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:13:51,117 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 12 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:13:51,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:13:51,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996147993] [2021-05-21 21:13:51,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996147993] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:13:51,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371689413] [2021-05-21 21:13:51,117 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 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 [2021-05-21 21:13:51,155 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:13:51,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:13:51,155 WARN L261 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-21 21:13:51,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:13:51,534 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:13:51,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371689413] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:13:51,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:13:51,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 34 [2021-05-21 21:13:51,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112097647] [2021-05-21 21:13:51,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-21 21:13:51,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:13:51,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-21 21:13:51,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1041, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 21:13:51,535 INFO L87 Difference]: Start difference. First operand 576 states and 1210 transitions. Second operand has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:52,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:13:52,479 INFO L93 Difference]: Finished difference Result 810 states and 1676 transitions. [2021-05-21 21:13:52,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-21 21:13:52,479 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 21:13:52,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:13:52,480 INFO L225 Difference]: With dead ends: 810 [2021-05-21 21:13:52,480 INFO L226 Difference]: Without dead ends: 790 [2021-05-21 21:13:52,480 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 769 ImplicationChecksByTransitivity, 836.0ms TimeCoverageRelationStatistics Valid=346, Invalid=2516, Unknown=0, NotChecked=0, Total=2862 [2021-05-21 21:13:52,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2021-05-21 21:13:52,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 536. [2021-05-21 21:13:52,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 535 states have (on average 2.1121495327102804) internal successors, (1130), 535 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:52,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 1130 transitions. [2021-05-21 21:13:52,485 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 1130 transitions. Word has length 37 [2021-05-21 21:13:52,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:13:52,485 INFO L482 AbstractCegarLoop]: Abstraction has 536 states and 1130 transitions. [2021-05-21 21:13:52,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:13:52,485 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 1130 transitions. [2021-05-21 21:13:52,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 21:13:52,485 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:13:52,485 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:13:52,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-05-21 21:13:52,701 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:13:52,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:13:52,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1136264889, now seen corresponding path program 101 times [2021-05-21 21:13:52,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:13:52,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787829879] [2021-05-21 21:13:52,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:13:52,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:13:52,925 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:13:52,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:13:52,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787829879] [2021-05-21 21:13:52,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787829879] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:13:52,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649388884] [2021-05-21 21:13:52,925 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 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 [2021-05-21 21:13:52,950 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-21 21:13:52,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:13:52,951 WARN L261 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-21 21:13:52,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:13:53,398 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:13:53,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649388884] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:13:53,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:13:53,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 33 [2021-05-21 21:13:53,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279572159] [2021-05-21 21:13:53,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-21 21:13:53,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:13:53,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-21 21:13:53,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=983, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 21:13:53,399 INFO L87 Difference]: Start difference. First operand 536 states and 1130 transitions. Second operand has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 33 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:00,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:14:00,028 INFO L93 Difference]: Finished difference Result 1533 states and 3130 transitions. [2021-05-21 21:14:00,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2021-05-21 21:14:00,028 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 33 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 21:14:00,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:14:00,029 INFO L225 Difference]: With dead ends: 1533 [2021-05-21 21:14:00,029 INFO L226 Difference]: Without dead ends: 1494 [2021-05-21 21:14:00,030 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8152 ImplicationChecksByTransitivity, 6002.4ms TimeCoverageRelationStatistics Valid=2594, Invalid=18868, Unknown=0, NotChecked=0, Total=21462 [2021-05-21 21:14:00,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1494 states. [2021-05-21 21:14:00,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1494 to 599. [2021-05-21 21:14:00,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 598 states have (on average 2.100334448160535) internal successors, (1256), 598 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:00,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 1256 transitions. [2021-05-21 21:14:00,036 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 1256 transitions. Word has length 37 [2021-05-21 21:14:00,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:14:00,036 INFO L482 AbstractCegarLoop]: Abstraction has 599 states and 1256 transitions. [2021-05-21 21:14:00,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 33 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:00,036 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 1256 transitions. [2021-05-21 21:14:00,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-21 21:14:00,037 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:14:00,037 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:14:00,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable180 [2021-05-21 21:14:00,238 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:14:00,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:14:00,238 INFO L82 PathProgramCache]: Analyzing trace with hash -829971433, now seen corresponding path program 102 times [2021-05-21 21:14:00,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:14:00,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429167245] [2021-05-21 21:14:00,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:14:00,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:14:00,492 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:14:00,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:14:00,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429167245] [2021-05-21 21:14:00,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429167245] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:14:00,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123717782] [2021-05-21 21:14:00,492 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 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 [2021-05-21 21:14:00,518 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-21 21:14:00,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:14:00,519 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-21 21:14:00,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:14:00,926 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:14:00,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123717782] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:14:00,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:14:00,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-05-21 21:14:00,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891377087] [2021-05-21 21:14:00,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-21 21:14:00,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:14:00,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-21 21:14:00,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1310, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 21:14:00,927 INFO L87 Difference]: Start difference. First operand 599 states and 1256 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:02,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:14:02,875 INFO L93 Difference]: Finished difference Result 1197 states and 2449 transitions. [2021-05-21 21:14:02,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-05-21 21:14:02,876 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-21 21:14:02,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:14:02,877 INFO L225 Difference]: With dead ends: 1197 [2021-05-21 21:14:02,877 INFO L226 Difference]: Without dead ends: 1130 [2021-05-21 21:14:02,882 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2587 ImplicationChecksByTransitivity, 1974.0ms TimeCoverageRelationStatistics Valid=1130, Invalid=7800, Unknown=0, NotChecked=0, Total=8930 [2021-05-21 21:14:02,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1130 states. [2021-05-21 21:14:02,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1130 to 752. [2021-05-21 21:14:02,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 751 states have (on average 2.1757656458055927) internal successors, (1634), 751 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:02,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 1634 transitions. [2021-05-21 21:14:02,889 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 1634 transitions. Word has length 39 [2021-05-21 21:14:02,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:14:02,889 INFO L482 AbstractCegarLoop]: Abstraction has 752 states and 1634 transitions. [2021-05-21 21:14:02,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:02,889 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 1634 transitions. [2021-05-21 21:14:02,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-21 21:14:02,890 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:14:02,890 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:14:03,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:14:03,093 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:14:03,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:14:03,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1236547937, now seen corresponding path program 103 times [2021-05-21 21:14:03,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:14:03,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832747228] [2021-05-21 21:14:03,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:14:03,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:14:03,345 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:14:03,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:14:03,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832747228] [2021-05-21 21:14:03,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832747228] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:14:03,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83854589] [2021-05-21 21:14:03,346 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 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 [2021-05-21 21:14:03,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:14:03,370 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-21 21:14:03,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:14:03,774 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:14:03,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83854589] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:14:03,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:14:03,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-05-21 21:14:03,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621599542] [2021-05-21 21:14:03,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-21 21:14:03,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:14:03,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-21 21:14:03,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1316, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 21:14:03,775 INFO L87 Difference]: Start difference. First operand 752 states and 1634 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:05,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:14:05,980 INFO L93 Difference]: Finished difference Result 1229 states and 2502 transitions. [2021-05-21 21:14:05,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-05-21 21:14:05,980 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-21 21:14:05,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:14:05,981 INFO L225 Difference]: With dead ends: 1229 [2021-05-21 21:14:05,981 INFO L226 Difference]: Without dead ends: 1173 [2021-05-21 21:14:05,982 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2946 ImplicationChecksByTransitivity, 2045.1ms TimeCoverageRelationStatistics Valid=1214, Invalid=8686, Unknown=0, NotChecked=0, Total=9900 [2021-05-21 21:14:05,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2021-05-21 21:14:05,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 754. [2021-05-21 21:14:05,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 753 states have (on average 2.1752988047808763) internal successors, (1638), 753 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:05,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1638 transitions. [2021-05-21 21:14:05,989 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1638 transitions. Word has length 39 [2021-05-21 21:14:05,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:14:05,989 INFO L482 AbstractCegarLoop]: Abstraction has 754 states and 1638 transitions. [2021-05-21 21:14:05,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:05,989 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1638 transitions. [2021-05-21 21:14:05,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-21 21:14:05,989 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:14:05,989 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:14:06,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-05-21 21:14:06,190 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:14:06,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:14:06,190 INFO L82 PathProgramCache]: Analyzing trace with hash 907136483, now seen corresponding path program 104 times [2021-05-21 21:14:06,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:14:06,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20263009] [2021-05-21 21:14:06,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:14:06,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:14:06,459 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:14:06,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:14:06,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20263009] [2021-05-21 21:14:06,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20263009] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:14:06,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506430347] [2021-05-21 21:14:06,459 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 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 [2021-05-21 21:14:06,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:14:06,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:14:06,484 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-21 21:14:06,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:14:06,903 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:14:06,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506430347] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:14:06,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:14:06,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-05-21 21:14:06,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751850087] [2021-05-21 21:14:06,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-21 21:14:06,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:14:06,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-21 21:14:06,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1318, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 21:14:06,904 INFO L87 Difference]: Start difference. First operand 754 states and 1638 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:09,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:14:09,151 INFO L93 Difference]: Finished difference Result 1227 states and 2500 transitions. [2021-05-21 21:14:09,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-05-21 21:14:09,151 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-21 21:14:09,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:14:09,152 INFO L225 Difference]: With dead ends: 1227 [2021-05-21 21:14:09,152 INFO L226 Difference]: Without dead ends: 1177 [2021-05-21 21:14:09,152 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3299 ImplicationChecksByTransitivity, 2172.5ms TimeCoverageRelationStatistics Valid=1311, Invalid=9609, Unknown=0, NotChecked=0, Total=10920 [2021-05-21 21:14:09,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1177 states. [2021-05-21 21:14:09,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1177 to 756. [2021-05-21 21:14:09,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 755 states have (on average 2.174834437086093) internal successors, (1642), 755 states have internal predecessors, (1642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:09,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 1642 transitions. [2021-05-21 21:14:09,159 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 1642 transitions. Word has length 39 [2021-05-21 21:14:09,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:14:09,159 INFO L482 AbstractCegarLoop]: Abstraction has 756 states and 1642 transitions. [2021-05-21 21:14:09,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:09,159 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 1642 transitions. [2021-05-21 21:14:09,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-21 21:14:09,160 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:14:09,160 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:14:09,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2021-05-21 21:14:09,360 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:14:09,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:14:09,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1937298983, now seen corresponding path program 105 times [2021-05-21 21:14:09,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:14:09,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999408754] [2021-05-21 21:14:09,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:14:09,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:14:09,607 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:14:09,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:14:09,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999408754] [2021-05-21 21:14:09,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999408754] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:14:09,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991964530] [2021-05-21 21:14:09,608 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 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 [2021-05-21 21:14:09,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-21 21:14:09,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:14:09,634 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-21 21:14:09,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:14:10,239 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:14:10,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991964530] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:14:10,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:14:10,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-05-21 21:14:10,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605025485] [2021-05-21 21:14:10,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-21 21:14:10,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:14:10,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-21 21:14:10,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1364, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 21:14:10,240 INFO L87 Difference]: Start difference. First operand 756 states and 1642 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:13,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:14:13,869 INFO L93 Difference]: Finished difference Result 1231 states and 2510 transitions. [2021-05-21 21:14:13,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-05-21 21:14:13,869 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-21 21:14:13,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:14:13,870 INFO L225 Difference]: With dead ends: 1231 [2021-05-21 21:14:13,870 INFO L226 Difference]: Without dead ends: 1187 [2021-05-21 21:14:13,871 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4231 ImplicationChecksByTransitivity, 3294.6ms TimeCoverageRelationStatistics Valid=1548, Invalid=13458, Unknown=0, NotChecked=0, Total=15006 [2021-05-21 21:14:13,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1187 states. [2021-05-21 21:14:13,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1187 to 758. [2021-05-21 21:14:13,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 2.1743725231175692) internal successors, (1646), 757 states have internal predecessors, (1646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:13,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 1646 transitions. [2021-05-21 21:14:13,879 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 1646 transitions. Word has length 39 [2021-05-21 21:14:13,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:14:13,879 INFO L482 AbstractCegarLoop]: Abstraction has 758 states and 1646 transitions. [2021-05-21 21:14:13,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:13,879 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 1646 transitions. [2021-05-21 21:14:13,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-21 21:14:13,880 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:14:13,880 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:14:14,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:14:14,080 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:14:14,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:14:14,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1261625493, now seen corresponding path program 106 times [2021-05-21 21:14:14,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:14:14,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188067009] [2021-05-21 21:14:14,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:14:14,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:14:14,334 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:14:14,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:14:14,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188067009] [2021-05-21 21:14:14,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188067009] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:14:14,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857519191] [2021-05-21 21:14:14,334 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 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 [2021-05-21 21:14:14,357 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:14:14,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:14:14,358 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-21 21:14:14,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:14:14,770 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:14:14,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857519191] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:14:14,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:14:14,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-05-21 21:14:14,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901016050] [2021-05-21 21:14:14,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-21 21:14:14,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:14:14,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-21 21:14:14,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1310, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 21:14:14,771 INFO L87 Difference]: Start difference. First operand 758 states and 1646 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:17,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:14:17,358 INFO L93 Difference]: Finished difference Result 1225 states and 2500 transitions. [2021-05-21 21:14:17,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-05-21 21:14:17,359 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-21 21:14:17,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:14:17,360 INFO L225 Difference]: With dead ends: 1225 [2021-05-21 21:14:17,360 INFO L226 Difference]: Without dead ends: 1187 [2021-05-21 21:14:17,360 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4061 ImplicationChecksByTransitivity, 2394.6ms TimeCoverageRelationStatistics Valid=1580, Invalid=11530, Unknown=0, NotChecked=0, Total=13110 [2021-05-21 21:14:17,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1187 states. [2021-05-21 21:14:17,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1187 to 760. [2021-05-21 21:14:17,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 759 states have (on average 2.1739130434782608) internal successors, (1650), 759 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:17,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 1650 transitions. [2021-05-21 21:14:17,367 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 1650 transitions. Word has length 39 [2021-05-21 21:14:17,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:14:17,367 INFO L482 AbstractCegarLoop]: Abstraction has 760 states and 1650 transitions. [2021-05-21 21:14:17,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:17,367 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 1650 transitions. [2021-05-21 21:14:17,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-21 21:14:17,368 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:14:17,368 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:14:17,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:14:17,569 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:14:17,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:14:17,569 INFO L82 PathProgramCache]: Analyzing trace with hash -429200977, now seen corresponding path program 107 times [2021-05-21 21:14:17,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:14:17,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728725019] [2021-05-21 21:14:17,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:14:17,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:14:17,853 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:14:17,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:14:17,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728725019] [2021-05-21 21:14:17,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728725019] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:14:17,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927284165] [2021-05-21 21:14:17,853 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 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 [2021-05-21 21:14:17,878 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-21 21:14:17,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:14:17,878 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-21 21:14:17,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:14:18,285 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:14:18,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927284165] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:14:18,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:14:18,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-05-21 21:14:18,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29549091] [2021-05-21 21:14:18,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-21 21:14:18,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:14:18,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-21 21:14:18,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 21:14:18,286 INFO L87 Difference]: Start difference. First operand 760 states and 1650 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:21,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:14:21,234 INFO L93 Difference]: Finished difference Result 1282 states and 2603 transitions. [2021-05-21 21:14:21,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-05-21 21:14:21,235 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-21 21:14:21,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:14:21,235 INFO L225 Difference]: With dead ends: 1282 [2021-05-21 21:14:21,235 INFO L226 Difference]: Without dead ends: 1237 [2021-05-21 21:14:21,236 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4334 ImplicationChecksByTransitivity, 2687.1ms TimeCoverageRelationStatistics Valid=1736, Invalid=12306, Unknown=0, NotChecked=0, Total=14042 [2021-05-21 21:14:21,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1237 states. [2021-05-21 21:14:21,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1237 to 763. [2021-05-21 21:14:21,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 763 states, 762 states have (on average 2.1758530183727034) internal successors, (1658), 762 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:21,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 1658 transitions. [2021-05-21 21:14:21,242 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 1658 transitions. Word has length 39 [2021-05-21 21:14:21,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:14:21,243 INFO L482 AbstractCegarLoop]: Abstraction has 763 states and 1658 transitions. [2021-05-21 21:14:21,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:21,243 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 1658 transitions. [2021-05-21 21:14:21,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-21 21:14:21,243 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:14:21,243 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:14:21,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2021-05-21 21:14:21,444 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:14:21,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:14:21,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1694128837, now seen corresponding path program 108 times [2021-05-21 21:14:21,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:14:21,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487546079] [2021-05-21 21:14:21,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:14:21,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:14:21,718 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:14:21,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:14:21,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487546079] [2021-05-21 21:14:21,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487546079] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:14:21,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991164156] [2021-05-21 21:14:21,718 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 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 [2021-05-21 21:14:21,743 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-21 21:14:21,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:14:21,744 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2021-05-21 21:14:21,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:14:22,315 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:14:22,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991164156] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:14:22,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:14:22,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-05-21 21:14:22,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677058955] [2021-05-21 21:14:22,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-21 21:14:22,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:14:22,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-21 21:14:22,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1315, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 21:14:22,316 INFO L87 Difference]: Start difference. First operand 763 states and 1658 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:25,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:14:25,871 INFO L93 Difference]: Finished difference Result 1163 states and 2364 transitions. [2021-05-21 21:14:25,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-05-21 21:14:25,871 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-21 21:14:25,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:14:25,872 INFO L225 Difference]: With dead ends: 1163 [2021-05-21 21:14:25,872 INFO L226 Difference]: Without dead ends: 1136 [2021-05-21 21:14:25,873 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4206 ImplicationChecksByTransitivity, 3230.1ms TimeCoverageRelationStatistics Valid=1767, Invalid=12513, Unknown=0, NotChecked=0, Total=14280 [2021-05-21 21:14:25,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2021-05-21 21:14:25,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 782. [2021-05-21 21:14:25,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 781 states have (on average 2.17797695262484) internal successors, (1701), 781 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:25,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 1701 transitions. [2021-05-21 21:14:25,879 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 1701 transitions. Word has length 39 [2021-05-21 21:14:25,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:14:25,880 INFO L482 AbstractCegarLoop]: Abstraction has 782 states and 1701 transitions. [2021-05-21 21:14:25,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:25,880 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 1701 transitions. [2021-05-21 21:14:25,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-21 21:14:25,880 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:14:25,880 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:14:26,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:14:26,095 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:14:26,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:14:26,096 INFO L82 PathProgramCache]: Analyzing trace with hash 318889065, now seen corresponding path program 109 times [2021-05-21 21:14:26,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:14:26,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477649095] [2021-05-21 21:14:26,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:14:26,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:14:26,343 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:14:26,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:14:26,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477649095] [2021-05-21 21:14:26,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477649095] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:14:26,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195521001] [2021-05-21 21:14:26,343 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 21:14:26,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:14:26,367 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-21 21:14:26,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:14:26,775 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:14:26,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195521001] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:14:26,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:14:26,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-05-21 21:14:26,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120846082] [2021-05-21 21:14:26,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-21 21:14:26,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:14:26,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-21 21:14:26,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1309, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 21:14:26,776 INFO L87 Difference]: Start difference. First operand 782 states and 1701 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:28,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:14:28,782 INFO L93 Difference]: Finished difference Result 1209 states and 2470 transitions. [2021-05-21 21:14:28,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-05-21 21:14:28,783 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-21 21:14:28,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:14:28,784 INFO L225 Difference]: With dead ends: 1209 [2021-05-21 21:14:28,784 INFO L226 Difference]: Without dead ends: 1159 [2021-05-21 21:14:28,784 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2982 ImplicationChecksByTransitivity, 2013.8ms TimeCoverageRelationStatistics Valid=1134, Invalid=8766, Unknown=0, NotChecked=0, Total=9900 [2021-05-21 21:14:28,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2021-05-21 21:14:28,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 784. [2021-05-21 21:14:28,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 783 states have (on average 2.177522349936143) internal successors, (1705), 783 states have internal predecessors, (1705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:28,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 1705 transitions. [2021-05-21 21:14:28,791 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 1705 transitions. Word has length 39 [2021-05-21 21:14:28,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:14:28,791 INFO L482 AbstractCegarLoop]: Abstraction has 784 states and 1705 transitions. [2021-05-21 21:14:28,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:28,791 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 1705 transitions. [2021-05-21 21:14:28,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-21 21:14:28,792 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:14:28,792 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:14:28,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:14:28,992 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:14:28,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:14:28,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1349051565, now seen corresponding path program 110 times [2021-05-21 21:14:28,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:14:28,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523638931] [2021-05-21 21:14:28,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:14:28,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:14:29,236 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:14:29,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:14:29,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523638931] [2021-05-21 21:14:29,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523638931] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:14:29,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424183792] [2021-05-21 21:14:29,236 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 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 [2021-05-21 21:14:29,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:14:29,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:14:29,260 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-21 21:14:29,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:14:29,667 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:14:29,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424183792] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:14:29,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:14:29,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-05-21 21:14:29,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277742183] [2021-05-21 21:14:29,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-21 21:14:29,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:14:29,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-21 21:14:29,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1307, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 21:14:29,667 INFO L87 Difference]: Start difference. First operand 784 states and 1705 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:31,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:14:31,893 INFO L93 Difference]: Finished difference Result 1212 states and 2490 transitions. [2021-05-21 21:14:31,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-05-21 21:14:31,894 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-21 21:14:31,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:14:31,895 INFO L225 Difference]: With dead ends: 1212 [2021-05-21 21:14:31,895 INFO L226 Difference]: Without dead ends: 1168 [2021-05-21 21:14:31,895 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3335 ImplicationChecksByTransitivity, 2104.8ms TimeCoverageRelationStatistics Valid=1265, Invalid=9655, Unknown=0, NotChecked=0, Total=10920 [2021-05-21 21:14:31,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1168 states. [2021-05-21 21:14:31,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1168 to 794. [2021-05-21 21:14:31,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 794 states, 793 states have (on average 2.1853720050441363) internal successors, (1733), 793 states have internal predecessors, (1733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:31,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 1733 transitions. [2021-05-21 21:14:31,902 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 1733 transitions. Word has length 39 [2021-05-21 21:14:31,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:14:31,902 INFO L482 AbstractCegarLoop]: Abstraction has 794 states and 1733 transitions. [2021-05-21 21:14:31,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:31,902 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 1733 transitions. [2021-05-21 21:14:31,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-21 21:14:31,903 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:14:31,903 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:14:32,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-05-21 21:14:32,103 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:14:32,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:14:32,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1849872911, now seen corresponding path program 111 times [2021-05-21 21:14:32,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:14:32,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518614766] [2021-05-21 21:14:32,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:14:32,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:14:32,347 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:14:32,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:14:32,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518614766] [2021-05-21 21:14:32,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518614766] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:14:32,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958468392] [2021-05-21 21:14:32,348 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 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 [2021-05-21 21:14:32,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-21 21:14:32,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:14:32,374 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-21 21:14:32,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:14:32,932 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:14:32,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958468392] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:14:32,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:14:32,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-05-21 21:14:32,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304859956] [2021-05-21 21:14:32,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-21 21:14:32,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:14:32,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-21 21:14:32,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1328, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 21:14:32,933 INFO L87 Difference]: Start difference. First operand 794 states and 1733 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:36,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:14:36,026 INFO L93 Difference]: Finished difference Result 1224 states and 2528 transitions. [2021-05-21 21:14:36,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-05-21 21:14:36,026 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-21 21:14:36,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:14:36,027 INFO L225 Difference]: With dead ends: 1224 [2021-05-21 21:14:36,027 INFO L226 Difference]: Without dead ends: 1186 [2021-05-21 21:14:36,028 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3844 ImplicationChecksByTransitivity, 2893.8ms TimeCoverageRelationStatistics Valid=1462, Invalid=11878, Unknown=0, NotChecked=0, Total=13340 [2021-05-21 21:14:36,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1186 states. [2021-05-21 21:14:36,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1186 to 804. [2021-05-21 21:14:36,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 803 states have (on average 2.1930261519302614) internal successors, (1761), 803 states have internal predecessors, (1761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:36,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 1761 transitions. [2021-05-21 21:14:36,035 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 1761 transitions. Word has length 39 [2021-05-21 21:14:36,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:14:36,035 INFO L482 AbstractCegarLoop]: Abstraction has 804 states and 1761 transitions. [2021-05-21 21:14:36,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:36,035 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 1761 transitions. [2021-05-21 21:14:36,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-21 21:14:36,036 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:14:36,036 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:14:36,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2021-05-21 21:14:36,236 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:14:36,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:14:36,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1017448395, now seen corresponding path program 112 times [2021-05-21 21:14:36,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:14:36,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524853245] [2021-05-21 21:14:36,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:14:36,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:14:36,516 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:14:36,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:14:36,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524853245] [2021-05-21 21:14:36,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524853245] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:14:36,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225446000] [2021-05-21 21:14:36,516 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 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 [2021-05-21 21:14:36,539 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:14:36,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:14:36,540 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-21 21:14:36,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:14:36,942 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:14:36,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225446000] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:14:36,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:14:36,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-05-21 21:14:36,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662972095] [2021-05-21 21:14:36,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-21 21:14:36,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:14:36,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-21 21:14:36,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1288, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 21:14:36,943 INFO L87 Difference]: Start difference. First operand 804 states and 1761 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:39,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:14:39,571 INFO L93 Difference]: Finished difference Result 1310 states and 2688 transitions. [2021-05-21 21:14:39,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-05-21 21:14:39,571 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-21 21:14:39,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:14:39,572 INFO L225 Difference]: With dead ends: 1310 [2021-05-21 21:14:39,572 INFO L226 Difference]: Without dead ends: 1265 [2021-05-21 21:14:39,573 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3959 ImplicationChecksByTransitivity, 2505.3ms TimeCoverageRelationStatistics Valid=1571, Invalid=11311, Unknown=0, NotChecked=0, Total=12882 [2021-05-21 21:14:39,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1265 states. [2021-05-21 21:14:39,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1265 to 808. [2021-05-21 21:14:39,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 807 states have (on average 2.195786864931846) internal successors, (1772), 807 states have internal predecessors, (1772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:39,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 1772 transitions. [2021-05-21 21:14:39,580 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 1772 transitions. Word has length 39 [2021-05-21 21:14:39,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:14:39,580 INFO L482 AbstractCegarLoop]: Abstraction has 808 states and 1772 transitions. [2021-05-21 21:14:39,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:39,580 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 1772 transitions. [2021-05-21 21:14:39,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-21 21:14:39,581 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:14:39,581 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:14:39,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:14:39,781 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:14:39,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:14:39,782 INFO L82 PathProgramCache]: Analyzing trace with hash 2012591041, now seen corresponding path program 113 times [2021-05-21 21:14:39,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:14:39,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881534920] [2021-05-21 21:14:39,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:14:39,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:14:40,057 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:14:40,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:14:40,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881534920] [2021-05-21 21:14:40,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881534920] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:14:40,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629929544] [2021-05-21 21:14:40,057 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:14:40,082 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-21 21:14:40,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:14:40,083 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-21 21:14:40,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:14:40,492 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:14:40,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629929544] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:14:40,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:14:40,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-05-21 21:14:40,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432299605] [2021-05-21 21:14:40,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-21 21:14:40,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:14:40,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-21 21:14:40,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1286, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 21:14:40,493 INFO L87 Difference]: Start difference. First operand 808 states and 1772 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:42,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:14:42,913 INFO L93 Difference]: Finished difference Result 1169 states and 2413 transitions. [2021-05-21 21:14:42,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-05-21 21:14:42,913 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-21 21:14:42,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:14:42,914 INFO L225 Difference]: With dead ends: 1169 [2021-05-21 21:14:42,914 INFO L226 Difference]: Without dead ends: 1142 [2021-05-21 21:14:42,914 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3353 ImplicationChecksByTransitivity, 2346.2ms TimeCoverageRelationStatistics Valid=1492, Invalid=9638, Unknown=0, NotChecked=0, Total=11130 [2021-05-21 21:14:42,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1142 states. [2021-05-21 21:14:42,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1142 to 774. [2021-05-21 21:14:42,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 773 states have (on average 2.179818887451488) internal successors, (1685), 773 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:42,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 1685 transitions. [2021-05-21 21:14:42,921 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 1685 transitions. Word has length 39 [2021-05-21 21:14:42,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:14:42,921 INFO L482 AbstractCegarLoop]: Abstraction has 774 states and 1685 transitions. [2021-05-21 21:14:42,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:42,921 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 1685 transitions. [2021-05-21 21:14:42,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-21 21:14:42,922 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:14:42,922 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:14:43,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:14:43,122 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:14:43,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:14:43,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1299362665, now seen corresponding path program 114 times [2021-05-21 21:14:43,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:14:43,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385314277] [2021-05-21 21:14:43,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:14:43,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:14:43,365 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:14:43,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:14:43,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385314277] [2021-05-21 21:14:43,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385314277] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:14:43,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781922772] [2021-05-21 21:14:43,365 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 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 [2021-05-21 21:14:43,389 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-21 21:14:43,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:14:43,390 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 56 conjunts are in the unsatisfiable core [2021-05-21 21:14:43,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:14:43,820 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:14:43,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781922772] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:14:43,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:14:43,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-05-21 21:14:43,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871759895] [2021-05-21 21:14:43,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-21 21:14:43,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:14:43,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-21 21:14:43,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1307, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 21:14:43,820 INFO L87 Difference]: Start difference. First operand 774 states and 1685 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:46,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:14:46,032 INFO L93 Difference]: Finished difference Result 1152 states and 2354 transitions. [2021-05-21 21:14:46,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-05-21 21:14:46,032 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-21 21:14:46,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:14:46,033 INFO L225 Difference]: With dead ends: 1152 [2021-05-21 21:14:46,033 INFO L226 Difference]: Without dead ends: 1108 [2021-05-21 21:14:46,033 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3406 ImplicationChecksByTransitivity, 2193.5ms TimeCoverageRelationStatistics Valid=1243, Invalid=9887, Unknown=0, NotChecked=0, Total=11130 [2021-05-21 21:14:46,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1108 states. [2021-05-21 21:14:46,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1108 to 776. [2021-05-21 21:14:46,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 775 states have (on average 2.1793548387096773) internal successors, (1689), 775 states have internal predecessors, (1689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:46,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1689 transitions. [2021-05-21 21:14:46,040 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1689 transitions. Word has length 39 [2021-05-21 21:14:46,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:14:46,040 INFO L482 AbstractCegarLoop]: Abstraction has 776 states and 1689 transitions. [2021-05-21 21:14:46,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:46,040 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1689 transitions. [2021-05-21 21:14:46,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-21 21:14:46,041 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:14:46,041 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:14:46,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:14:46,242 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:14:46,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:14:46,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1899561811, now seen corresponding path program 115 times [2021-05-21 21:14:46,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:14:46,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597680090] [2021-05-21 21:14:46,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:14:46,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:14:46,486 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:14:46,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:14:46,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597680090] [2021-05-21 21:14:46,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597680090] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:14:46,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788234601] [2021-05-21 21:14:46,486 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 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 [2021-05-21 21:14:46,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:14:46,509 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-21 21:14:46,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:14:46,924 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:14:46,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788234601] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:14:46,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:14:46,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-05-21 21:14:46,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107098267] [2021-05-21 21:14:46,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-21 21:14:46,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:14:46,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-21 21:14:46,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1298, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 21:14:46,925 INFO L87 Difference]: Start difference. First operand 776 states and 1689 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:49,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:14:49,204 INFO L93 Difference]: Finished difference Result 1157 states and 2374 transitions. [2021-05-21 21:14:49,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-05-21 21:14:49,205 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-21 21:14:49,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:14:49,205 INFO L225 Difference]: With dead ends: 1157 [2021-05-21 21:14:49,205 INFO L226 Difference]: Without dead ends: 1119 [2021-05-21 21:14:49,206 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3829 ImplicationChecksByTransitivity, 2281.6ms TimeCoverageRelationStatistics Valid=1411, Invalid=10799, Unknown=0, NotChecked=0, Total=12210 [2021-05-21 21:14:49,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2021-05-21 21:14:49,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 782. [2021-05-21 21:14:49,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 781 states have (on average 2.183098591549296) internal successors, (1705), 781 states have internal predecessors, (1705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:49,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 1705 transitions. [2021-05-21 21:14:49,213 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 1705 transitions. Word has length 39 [2021-05-21 21:14:49,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:14:49,213 INFO L482 AbstractCegarLoop]: Abstraction has 782 states and 1705 transitions. [2021-05-21 21:14:49,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:49,213 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 1705 transitions. [2021-05-21 21:14:49,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-21 21:14:49,213 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:14:49,213 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:14:49,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-05-21 21:14:49,414 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:14:49,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:14:49,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1067137295, now seen corresponding path program 116 times [2021-05-21 21:14:49,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:14:49,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990781929] [2021-05-21 21:14:49,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:14:49,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:14:49,715 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:14:49,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:14:49,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990781929] [2021-05-21 21:14:49,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990781929] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:14:49,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943272838] [2021-05-21 21:14:49,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 21:14:49,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:14:49,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:14:49,740 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-21 21:14:49,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:14:50,142 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:14:50,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943272838] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:14:50,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:14:50,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-05-21 21:14:50,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872119692] [2021-05-21 21:14:50,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-21 21:14:50,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:14:50,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-21 21:14:50,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1285, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 21:14:50,143 INFO L87 Difference]: Start difference. First operand 782 states and 1705 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:52,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:14:52,795 INFO L93 Difference]: Finished difference Result 1249 states and 2546 transitions. [2021-05-21 21:14:52,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-05-21 21:14:52,795 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-21 21:14:52,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:14:52,796 INFO L225 Difference]: With dead ends: 1249 [2021-05-21 21:14:52,796 INFO L226 Difference]: Without dead ends: 1204 [2021-05-21 21:14:52,797 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4088 ImplicationChecksByTransitivity, 2560.4ms TimeCoverageRelationStatistics Valid=1579, Invalid=11531, Unknown=0, NotChecked=0, Total=13110 [2021-05-21 21:14:52,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1204 states. [2021-05-21 21:14:52,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1204 to 786. [2021-05-21 21:14:52,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 785 states have (on average 2.1859872611464968) internal successors, (1716), 785 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:52,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 1716 transitions. [2021-05-21 21:14:52,804 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 1716 transitions. Word has length 39 [2021-05-21 21:14:52,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:14:52,804 INFO L482 AbstractCegarLoop]: Abstraction has 786 states and 1716 transitions. [2021-05-21 21:14:52,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:52,804 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 1716 transitions. [2021-05-21 21:14:52,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-21 21:14:52,804 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:14:52,804 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:14:53,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-05-21 21:14:53,005 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:14:53,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:14:53,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1962902141, now seen corresponding path program 117 times [2021-05-21 21:14:53,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:14:53,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183918806] [2021-05-21 21:14:53,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:14:53,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:14:53,281 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:14:53,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:14:53,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183918806] [2021-05-21 21:14:53,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183918806] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:14:53,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164352639] [2021-05-21 21:14:53,281 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 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 [2021-05-21 21:14:53,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-21 21:14:53,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:14:53,309 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-21 21:14:53,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:14:53,953 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:14:53,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164352639] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:14:53,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:14:53,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-05-21 21:14:53,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264171432] [2021-05-21 21:14:53,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-21 21:14:53,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:14:53,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-21 21:14:53,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1353, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 21:14:53,954 INFO L87 Difference]: Start difference. First operand 786 states and 1716 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:57,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:14:57,695 INFO L93 Difference]: Finished difference Result 1162 states and 2375 transitions. [2021-05-21 21:14:57,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-05-21 21:14:57,696 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-21 21:14:57,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:14:57,697 INFO L225 Difference]: With dead ends: 1162 [2021-05-21 21:14:57,697 INFO L226 Difference]: Without dead ends: 1121 [2021-05-21 21:14:57,697 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4026 ImplicationChecksByTransitivity, 3592.0ms TimeCoverageRelationStatistics Valid=1607, Invalid=12673, Unknown=0, NotChecked=0, Total=14280 [2021-05-21 21:14:57,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1121 states. [2021-05-21 21:14:57,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1121 to 604. [2021-05-21 21:14:57,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 603 states have (on average 2.1160862354892207) internal successors, (1276), 603 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:57,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 1276 transitions. [2021-05-21 21:14:57,703 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 1276 transitions. Word has length 39 [2021-05-21 21:14:57,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:14:57,703 INFO L482 AbstractCegarLoop]: Abstraction has 604 states and 1276 transitions. [2021-05-21 21:14:57,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:14:57,703 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 1276 transitions. [2021-05-21 21:14:57,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-21 21:14:57,704 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:14:57,704 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:14:57,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:14:57,904 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:14:57,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:14:57,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1278036585, now seen corresponding path program 118 times [2021-05-21 21:14:57,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:14:57,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357140812] [2021-05-21 21:14:57,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:14:57,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:14:58,150 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:14:58,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:14:58,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357140812] [2021-05-21 21:14:58,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357140812] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:14:58,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505873009] [2021-05-21 21:14:58,150 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 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 [2021-05-21 21:14:58,174 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:14:58,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:14:58,175 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-21 21:14:58,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:14:58,603 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:14:58,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505873009] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:14:58,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:14:58,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-05-21 21:14:58,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665096152] [2021-05-21 21:14:58,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-21 21:14:58,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:14:58,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-21 21:14:58,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1296, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 21:14:58,604 INFO L87 Difference]: Start difference. First operand 604 states and 1276 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:15:00,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:15:00,978 INFO L93 Difference]: Finished difference Result 922 states and 1823 transitions. [2021-05-21 21:15:00,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-05-21 21:15:00,978 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-21 21:15:00,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:15:00,979 INFO L225 Difference]: With dead ends: 922 [2021-05-21 21:15:00,979 INFO L226 Difference]: Without dead ends: 884 [2021-05-21 21:15:00,979 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3950 ImplicationChecksByTransitivity, 2328.7ms TimeCoverageRelationStatistics Valid=1385, Invalid=11047, Unknown=0, NotChecked=0, Total=12432 [2021-05-21 21:15:00,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2021-05-21 21:15:00,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 606. [2021-05-21 21:15:00,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 605 states have (on average 2.115702479338843) internal successors, (1280), 605 states have internal predecessors, (1280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:15:00,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 1280 transitions. [2021-05-21 21:15:00,984 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 1280 transitions. Word has length 39 [2021-05-21 21:15:00,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:15:00,985 INFO L482 AbstractCegarLoop]: Abstraction has 606 states and 1280 transitions. [2021-05-21 21:15:00,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:15:00,985 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 1280 transitions. [2021-05-21 21:15:00,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-21 21:15:00,985 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:15:00,985 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:15:01,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable264 [2021-05-21 21:15:01,186 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:15:01,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:15:01,186 INFO L82 PathProgramCache]: Analyzing trace with hash 2110461101, now seen corresponding path program 119 times [2021-05-21 21:15:01,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:15:01,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37225190] [2021-05-21 21:15:01,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:15:01,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:15:01,478 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:15:01,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:15:01,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37225190] [2021-05-21 21:15:01,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37225190] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:15:01,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984833952] [2021-05-21 21:15:01,479 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 21:15:01,505 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-21 21:15:01,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:15:01,506 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-21 21:15:01,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:15:01,927 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:15:01,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984833952] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:15:01,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:15:01,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-05-21 21:15:01,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489445408] [2021-05-21 21:15:01,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-21 21:15:01,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:15:01,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-21 21:15:01,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1283, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 21:15:01,928 INFO L87 Difference]: Start difference. First operand 606 states and 1280 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:15:04,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:15:04,687 INFO L93 Difference]: Finished difference Result 1010 states and 1983 transitions. [2021-05-21 21:15:04,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-05-21 21:15:04,687 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-21 21:15:04,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:15:04,688 INFO L225 Difference]: With dead ends: 1010 [2021-05-21 21:15:04,688 INFO L226 Difference]: Without dead ends: 965 [2021-05-21 21:15:04,689 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4228 ImplicationChecksByTransitivity, 2660.7ms TimeCoverageRelationStatistics Valid=1571, Invalid=11769, Unknown=0, NotChecked=0, Total=13340 [2021-05-21 21:15:04,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 965 states. [2021-05-21 21:15:04,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 965 to 608. [2021-05-21 21:15:04,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 607 states have (on average 2.116968698517298) internal successors, (1285), 607 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:15:04,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 1285 transitions. [2021-05-21 21:15:04,694 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 1285 transitions. Word has length 39 [2021-05-21 21:15:04,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:15:04,694 INFO L482 AbstractCegarLoop]: Abstraction has 608 states and 1285 transitions. [2021-05-21 21:15:04,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:15:04,695 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 1285 transitions. [2021-05-21 21:15:04,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-21 21:15:04,695 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:15:04,695 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:15:04,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-05-21 21:15:04,895 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:15:04,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:15:04,896 INFO L82 PathProgramCache]: Analyzing trace with hash 845533241, now seen corresponding path program 120 times [2021-05-21 21:15:04,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:15:04,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605313420] [2021-05-21 21:15:04,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:15:04,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:15:05,180 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:15:05,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:15:05,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605313420] [2021-05-21 21:15:05,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605313420] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:15:05,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312403140] [2021-05-21 21:15:05,181 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 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 [2021-05-21 21:15:05,206 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-21 21:15:05,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:15:05,207 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-21 21:15:05,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:15:05,738 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:15:05,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312403140] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:15:05,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:15:05,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-05-21 21:15:05,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037694031] [2021-05-21 21:15:05,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-21 21:15:05,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:15:05,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-21 21:15:05,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1299, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 21:15:05,739 INFO L87 Difference]: Start difference. First operand 608 states and 1285 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:15:08,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:15:08,968 INFO L93 Difference]: Finished difference Result 1026 states and 2029 transitions. [2021-05-21 21:15:08,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-05-21 21:15:08,968 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-21 21:15:08,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:15:08,969 INFO L225 Difference]: With dead ends: 1026 [2021-05-21 21:15:08,969 INFO L226 Difference]: Without dead ends: 978 [2021-05-21 21:15:08,969 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4001 ImplicationChecksByTransitivity, 2949.8ms TimeCoverageRelationStatistics Valid=1579, Invalid=11531, Unknown=0, NotChecked=0, Total=13110 [2021-05-21 21:15:08,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2021-05-21 21:15:08,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 595. [2021-05-21 21:15:08,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 594 states have (on average 2.1026936026936025) internal successors, (1249), 594 states have internal predecessors, (1249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:15:08,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 1249 transitions. [2021-05-21 21:15:08,975 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 1249 transitions. Word has length 39 [2021-05-21 21:15:08,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:15:08,975 INFO L482 AbstractCegarLoop]: Abstraction has 595 states and 1249 transitions. [2021-05-21 21:15:08,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:15:08,975 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 1249 transitions. [2021-05-21 21:15:08,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-21 21:15:08,976 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:15:08,976 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:15:09,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable266,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:15:09,176 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:15:09,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:15:09,176 INFO L82 PathProgramCache]: Analyzing trace with hash 379691369, now seen corresponding path program 121 times [2021-05-21 21:15:09,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:15:09,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663601264] [2021-05-21 21:15:09,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:15:09,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:15:09,396 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:15:09,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:15:09,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663601264] [2021-05-21 21:15:09,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663601264] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:15:09,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340977729] [2021-05-21 21:15:09,396 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 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 [2021-05-21 21:15:09,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:15:09,420 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-21 21:15:09,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:15:09,829 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:15:09,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340977729] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:15:09,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:15:09,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2021-05-21 21:15:09,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307964631] [2021-05-21 21:15:09,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-21 21:15:09,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:15:09,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-21 21:15:09,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1284, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 21:15:09,830 INFO L87 Difference]: Start difference. First operand 595 states and 1249 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:15:12,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:15:12,937 INFO L93 Difference]: Finished difference Result 1028 states and 2059 transitions. [2021-05-21 21:15:12,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-05-21 21:15:12,937 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-21 21:15:12,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:15:12,938 INFO L225 Difference]: With dead ends: 1028 [2021-05-21 21:15:12,938 INFO L226 Difference]: Without dead ends: 971 [2021-05-21 21:15:12,939 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5278 ImplicationChecksByTransitivity, 2932.0ms TimeCoverageRelationStatistics Valid=1778, Invalid=13972, Unknown=0, NotChecked=0, Total=15750 [2021-05-21 21:15:12,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2021-05-21 21:15:12,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 605. [2021-05-21 21:15:12,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 604 states have (on average 2.1009933774834435) internal successors, (1269), 604 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) [2021-05-21 21:15:12,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 1269 transitions. [2021-05-21 21:15:12,944 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 1269 transitions. Word has length 39 [2021-05-21 21:15:12,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:15:12,944 INFO L482 AbstractCegarLoop]: Abstraction has 605 states and 1269 transitions. [2021-05-21 21:15:12,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 38 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:15:12,944 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 1269 transitions. [2021-05-21 21:15:12,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-21 21:15:12,945 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:15:12,945 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:15:13,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-05-21 21:15:13,145 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:15:13,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:15:13,146 INFO L82 PathProgramCache]: Analyzing trace with hash -115557073, now seen corresponding path program 122 times [2021-05-21 21:15:13,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:15:13,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117786716] [2021-05-21 21:15:13,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:15:13,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:15:13,362 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 24 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:15:13,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:15:13,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117786716] [2021-05-21 21:15:13,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117786716] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:15:13,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055904980] [2021-05-21 21:15:13,363 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 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 [2021-05-21 21:15:13,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:15:13,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:15:13,389 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-21 21:15:13,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:15:13,797 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:15:13,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055904980] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:15:13,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:15:13,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 37 [2021-05-21 21:15:13,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455195111] [2021-05-21 21:15:13,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-21 21:15:13,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:15:13,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-21 21:15:13,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1214, Unknown=0, NotChecked=0, Total=1406 [2021-05-21 21:15:13,798 INFO L87 Difference]: Start difference. First operand 605 states and 1269 transitions. Second operand has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:15:16,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:15:16,507 INFO L93 Difference]: Finished difference Result 1122 states and 2231 transitions. [2021-05-21 21:15:16,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-05-21 21:15:16,507 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-21 21:15:16,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:15:16,508 INFO L225 Difference]: With dead ends: 1122 [2021-05-21 21:15:16,508 INFO L226 Difference]: Without dead ends: 1043 [2021-05-21 21:15:16,509 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4443 ImplicationChecksByTransitivity, 2549.8ms TimeCoverageRelationStatistics Valid=1670, Invalid=11902, Unknown=0, NotChecked=0, Total=13572 [2021-05-21 21:15:16,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1043 states. [2021-05-21 21:15:16,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1043 to 576. [2021-05-21 21:15:16,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 575 states have (on average 2.071304347826087) internal successors, (1191), 575 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:15:16,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 1191 transitions. [2021-05-21 21:15:16,514 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 1191 transitions. Word has length 39 [2021-05-21 21:15:16,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:15:16,514 INFO L482 AbstractCegarLoop]: Abstraction has 576 states and 1191 transitions. [2021-05-21 21:15:16,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:15:16,515 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 1191 transitions. [2021-05-21 21:15:16,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-21 21:15:16,515 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:15:16,515 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:15:16,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable278,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:15:16,715 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:15:16,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:15:16,716 INFO L82 PathProgramCache]: Analyzing trace with hash 2015955197, now seen corresponding path program 123 times [2021-05-21 21:15:16,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:15:16,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147189897] [2021-05-21 21:15:16,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:15:16,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:15:16,990 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:15:16,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:15:16,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147189897] [2021-05-21 21:15:16,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147189897] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:15:16,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178052120] [2021-05-21 21:15:16,990 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 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 [2021-05-21 21:15:17,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-05-21 21:15:17,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:15:17,017 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 56 conjunts are in the unsatisfiable core [2021-05-21 21:15:17,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:15:17,582 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:15:17,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178052120] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:15:17,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:15:17,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 33 [2021-05-21 21:15:17,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393743050] [2021-05-21 21:15:17,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-21 21:15:17,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:15:17,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-21 21:15:17,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=995, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 21:15:17,582 INFO L87 Difference]: Start difference. First operand 576 states and 1191 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 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) [2021-05-21 21:15:22,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:15:22,227 INFO L93 Difference]: Finished difference Result 956 states and 1931 transitions. [2021-05-21 21:15:22,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-05-21 21:15:22,227 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 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 39 [2021-05-21 21:15:22,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:15:22,228 INFO L225 Difference]: With dead ends: 956 [2021-05-21 21:15:22,228 INFO L226 Difference]: Without dead ends: 917 [2021-05-21 21:15:22,229 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5056 ImplicationChecksByTransitivity, 4232.6ms TimeCoverageRelationStatistics Valid=1504, Invalid=12776, Unknown=0, NotChecked=0, Total=14280 [2021-05-21 21:15:22,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 917 states. [2021-05-21 21:15:22,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 917 to 508. [2021-05-21 21:15:22,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 507 states have (on average 2.078895463510848) internal successors, (1054), 507 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:15:22,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 1054 transitions. [2021-05-21 21:15:22,234 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 1054 transitions. Word has length 39 [2021-05-21 21:15:22,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:15:22,234 INFO L482 AbstractCegarLoop]: Abstraction has 508 states and 1054 transitions. [2021-05-21 21:15:22,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 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) [2021-05-21 21:15:22,234 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 1054 transitions. [2021-05-21 21:15:22,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-21 21:15:22,234 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:15:22,234 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:15:22,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2021-05-21 21:15:22,435 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:15:22,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:15:22,435 INFO L82 PathProgramCache]: Analyzing trace with hash 963177715, now seen corresponding path program 124 times [2021-05-21 21:15:22,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:15:22,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366480296] [2021-05-21 21:15:22,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:15:22,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:15:22,757 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 1 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:15:22,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:15:22,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366480296] [2021-05-21 21:15:22,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366480296] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:15:22,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137482739] [2021-05-21 21:15:22,758 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 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 [2021-05-21 21:15:22,780 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:15:22,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:15:22,782 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-21 21:15:22,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:15:23,325 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:15:23,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137482739] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:15:23,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:15:23,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 37 [2021-05-21 21:15:23,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920253782] [2021-05-21 21:15:23,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-21 21:15:23,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:15:23,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-21 21:15:23,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1284, Unknown=0, NotChecked=0, Total=1406 [2021-05-21 21:15:23,326 INFO L87 Difference]: Start difference. First operand 508 states and 1054 transitions. Second operand has 38 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 37 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:15:24,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:15:24,690 INFO L93 Difference]: Finished difference Result 1041 states and 2115 transitions. [2021-05-21 21:15:24,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-21 21:15:24,691 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 37 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-21 21:15:24,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:15:24,691 INFO L225 Difference]: With dead ends: 1041 [2021-05-21 21:15:24,691 INFO L226 Difference]: Without dead ends: 1034 [2021-05-21 21:15:24,692 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 1248.5ms TimeCoverageRelationStatistics Valid=262, Invalid=3160, Unknown=0, NotChecked=0, Total=3422 [2021-05-21 21:15:24,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2021-05-21 21:15:24,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 524. [2021-05-21 21:15:24,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 523 states have (on average 2.0764818355640537) internal successors, (1086), 523 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:15:24,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 1086 transitions. [2021-05-21 21:15:24,697 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 1086 transitions. Word has length 39 [2021-05-21 21:15:24,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:15:24,697 INFO L482 AbstractCegarLoop]: Abstraction has 524 states and 1086 transitions. [2021-05-21 21:15:24,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 37 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:15:24,697 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 1086 transitions. [2021-05-21 21:15:24,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-21 21:15:24,698 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:15:24,698 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:15:24,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:15:24,899 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:15:24,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:15:24,899 INFO L82 PathProgramCache]: Analyzing trace with hash -892338777, now seen corresponding path program 125 times [2021-05-21 21:15:24,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:15:24,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165629271] [2021-05-21 21:15:24,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:15:24,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:15:24,957 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-21 21:15:24,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:15:24,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165629271] [2021-05-21 21:15:24,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165629271] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:15:24,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162129277] [2021-05-21 21:15:24,958 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 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 [2021-05-21 21:15:24,985 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-21 21:15:24,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:15:24,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-21 21:15:24,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:15:25,042 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-21 21:15:25,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162129277] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:15:25,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:15:25,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-05-21 21:15:25,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590652587] [2021-05-21 21:15:25,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 21:15:25,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:15:25,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 21:15:25,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:15:25,043 INFO L87 Difference]: Start difference. First operand 524 states and 1086 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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) [2021-05-21 21:15:25,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:15:25,177 INFO L93 Difference]: Finished difference Result 816 states and 1639 transitions. [2021-05-21 21:15:25,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 21:15:25,178 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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 41 [2021-05-21 21:15:25,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:15:25,179 INFO L225 Difference]: With dead ends: 816 [2021-05-21 21:15:25,179 INFO L226 Difference]: Without dead ends: 759 [2021-05-21 21:15:25,179 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 89.8ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-05-21 21:15:25,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2021-05-21 21:15:25,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 557. [2021-05-21 21:15:25,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 556 states have (on average 2.08273381294964) internal successors, (1158), 556 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:15:25,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 1158 transitions. [2021-05-21 21:15:25,184 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 1158 transitions. Word has length 41 [2021-05-21 21:15:25,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:15:25,184 INFO L482 AbstractCegarLoop]: Abstraction has 557 states and 1158 transitions. [2021-05-21 21:15:25,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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) [2021-05-21 21:15:25,184 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 1158 transitions. [2021-05-21 21:15:25,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-21 21:15:25,184 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:15:25,184 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:15:25,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable291 [2021-05-21 21:15:25,385 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:15:25,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:15:25,386 INFO L82 PathProgramCache]: Analyzing trace with hash 141760501, now seen corresponding path program 126 times [2021-05-21 21:15:25,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:15:25,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560953929] [2021-05-21 21:15:25,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:15:25,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:15:25,696 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:15:25,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:15:25,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560953929] [2021-05-21 21:15:25,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560953929] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:15:25,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585091574] [2021-05-21 21:15:25,697 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 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 [2021-05-21 21:15:25,726 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-05-21 21:15:25,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:15:25,727 WARN L261 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 61 conjunts are in the unsatisfiable core [2021-05-21 21:15:25,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:15:26,271 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:15:26,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585091574] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:15:26,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:15:26,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 39 [2021-05-21 21:15:26,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522796418] [2021-05-21 21:15:26,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-21 21:15:26,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:15:26,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-21 21:15:26,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1391, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 21:15:26,272 INFO L87 Difference]: Start difference. First operand 557 states and 1158 transitions. Second operand has 40 states, 40 states have (on average 1.975) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:15:33,114 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2021-05-21 21:15:34,562 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 71 [2021-05-21 21:15:34,718 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 76 [2021-05-21 21:15:34,856 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 70 [2021-05-21 21:15:35,905 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 76 [2021-05-21 21:15:36,104 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 67 [2021-05-21 21:15:36,243 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 70 [2021-05-21 21:15:36,425 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 68 [2021-05-21 21:15:42,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:15:42,717 INFO L93 Difference]: Finished difference Result 2491 states and 4951 transitions. [2021-05-21 21:15:42,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 263 states. [2021-05-21 21:15:42,717 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.975) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-05-21 21:15:42,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:15:42,719 INFO L225 Difference]: With dead ends: 2491 [2021-05-21 21:15:42,719 INFO L226 Difference]: Without dead ends: 2423 [2021-05-21 21:15:42,721 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32989 ImplicationChecksByTransitivity, 14171.1ms TimeCoverageRelationStatistics Valid=8903, Invalid=67549, Unknown=0, NotChecked=0, Total=76452 [2021-05-21 21:15:42,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2423 states. [2021-05-21 21:15:42,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2423 to 830. [2021-05-21 21:15:42,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 2.1049457177322073) internal successors, (1745), 829 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:15:42,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 1745 transitions. [2021-05-21 21:15:42,732 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 1745 transitions. Word has length 41 [2021-05-21 21:15:42,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:15:42,732 INFO L482 AbstractCegarLoop]: Abstraction has 830 states and 1745 transitions. [2021-05-21 21:15:42,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.975) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:15:42,732 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 1745 transitions. [2021-05-21 21:15:42,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-21 21:15:42,732 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:15:42,732 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:15:42,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:15:42,941 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:15:42,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:15:42,941 INFO L82 PathProgramCache]: Analyzing trace with hash -2063910491, now seen corresponding path program 127 times [2021-05-21 21:15:42,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:15:42,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430973978] [2021-05-21 21:15:42,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:15:42,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:15:43,183 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:15:43,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:15:43,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430973978] [2021-05-21 21:15:43,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430973978] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:15:43,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779846045] [2021-05-21 21:15:43,183 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 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 [2021-05-21 21:15:43,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:15:43,213 WARN L261 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 58 conjunts are in the unsatisfiable core [2021-05-21 21:15:43,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:15:43,726 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:15:43,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779846045] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:15:43,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:15:43,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 38 [2021-05-21 21:15:43,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396038643] [2021-05-21 21:15:43,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-21 21:15:43,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:15:43,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-21 21:15:43,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1330, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 21:15:43,727 INFO L87 Difference]: Start difference. First operand 830 states and 1745 transitions. Second operand has 39 states, 39 states have (on average 2.051282051282051) internal successors, (80), 38 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:15:46,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:15:46,215 INFO L93 Difference]: Finished difference Result 1299 states and 2636 transitions. [2021-05-21 21:15:46,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-05-21 21:15:46,216 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.051282051282051) internal successors, (80), 38 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-05-21 21:15:46,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:15:46,217 INFO L225 Difference]: With dead ends: 1299 [2021-05-21 21:15:46,217 INFO L226 Difference]: Without dead ends: 1267 [2021-05-21 21:15:46,218 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3572 ImplicationChecksByTransitivity, 2348.2ms TimeCoverageRelationStatistics Valid=743, Invalid=9969, Unknown=0, NotChecked=0, Total=10712 [2021-05-21 21:15:46,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2021-05-21 21:15:46,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 857. [2021-05-21 21:15:46,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 856 states have (on average 2.100467289719626) internal successors, (1798), 856 states have internal predecessors, (1798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:15:46,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 1798 transitions. [2021-05-21 21:15:46,225 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 1798 transitions. Word has length 41 [2021-05-21 21:15:46,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:15:46,225 INFO L482 AbstractCegarLoop]: Abstraction has 857 states and 1798 transitions. [2021-05-21 21:15:46,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.051282051282051) internal successors, (80), 38 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:15:46,225 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 1798 transitions. [2021-05-21 21:15:46,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-21 21:15:46,226 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:15:46,226 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:15:46,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable293 [2021-05-21 21:15:46,426 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:15:46,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:15:46,427 INFO L82 PathProgramCache]: Analyzing trace with hash -670644875, now seen corresponding path program 128 times [2021-05-21 21:15:46,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:15:46,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270394840] [2021-05-21 21:15:46,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:15:46,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:15:46,664 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:15:46,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:15:46,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270394840] [2021-05-21 21:15:46,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270394840] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:15:46,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786109652] [2021-05-21 21:15:46,664 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 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 [2021-05-21 21:15:46,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:15:46,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:15:46,693 WARN L261 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 58 conjunts are in the unsatisfiable core [2021-05-21 21:15:46,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:15:47,171 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:15:47,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786109652] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:15:47,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:15:47,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21] total 37 [2021-05-21 21:15:47,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503489171] [2021-05-21 21:15:47,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-21 21:15:47,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:15:47,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-21 21:15:47,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1263, Unknown=0, NotChecked=0, Total=1406 [2021-05-21 21:15:47,173 INFO L87 Difference]: Start difference. First operand 857 states and 1798 transitions. Second operand has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:15:49,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:15:49,427 INFO L93 Difference]: Finished difference Result 1376 states and 2792 transitions. [2021-05-21 21:15:49,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-05-21 21:15:49,428 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-05-21 21:15:49,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:15:49,429 INFO L225 Difference]: With dead ends: 1376 [2021-05-21 21:15:49,429 INFO L226 Difference]: Without dead ends: 1337 [2021-05-21 21:15:49,429 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2746 ImplicationChecksByTransitivity, 1944.6ms TimeCoverageRelationStatistics Valid=666, Invalid=7890, Unknown=0, NotChecked=0, Total=8556 [2021-05-21 21:15:49,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1337 states. [2021-05-21 21:15:49,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1337 to 848. [2021-05-21 21:15:49,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 848 states, 847 states have (on average 2.0968122786304604) internal successors, (1776), 847 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:15:49,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 1776 transitions. [2021-05-21 21:15:49,436 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 1776 transitions. Word has length 41 [2021-05-21 21:15:49,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:15:49,437 INFO L482 AbstractCegarLoop]: Abstraction has 848 states and 1776 transitions. [2021-05-21 21:15:49,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 37 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:15:49,437 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 1776 transitions. [2021-05-21 21:15:49,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-21 21:15:49,437 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:15:49,437 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:15:49,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:15:49,638 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:15:49,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:15:49,638 INFO L82 PathProgramCache]: Analyzing trace with hash 34337835, now seen corresponding path program 129 times [2021-05-21 21:15:49,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:15:49,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723965847] [2021-05-21 21:15:49,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:15:49,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:15:49,901 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 21:15:49,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:15:49,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723965847] [2021-05-21 21:15:49,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723965847] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:15:49,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831989508] [2021-05-21 21:15:49,902 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:15:49,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-21 21:15:49,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:15:49,928 WARN L261 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 58 conjunts are in the unsatisfiable core [2021-05-21 21:15:49,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:15:50,366 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:15:50,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831989508] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:15:50,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:15:50,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 37 [2021-05-21 21:15:50,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095004766] [2021-05-21 21:15:50,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-21 21:15:50,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:15:50,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-21 21:15:50,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1288, Unknown=0, NotChecked=0, Total=1406 [2021-05-21 21:15:50,367 INFO L87 Difference]: Start difference. First operand 848 states and 1776 transitions. Second operand has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 37 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:15:52,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:15:52,544 INFO L93 Difference]: Finished difference Result 1147 states and 2347 transitions. [2021-05-21 21:15:52,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-05-21 21:15:52,544 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 37 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-05-21 21:15:52,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:15:52,545 INFO L225 Difference]: With dead ends: 1147 [2021-05-21 21:15:52,545 INFO L226 Difference]: Without dead ends: 1089 [2021-05-21 21:15:52,545 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2384 ImplicationChecksByTransitivity, 1873.4ms TimeCoverageRelationStatistics Valid=561, Invalid=7449, Unknown=0, NotChecked=0, Total=8010 [2021-05-21 21:15:52,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2021-05-21 21:15:52,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 744. [2021-05-21 21:15:52,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 744 states, 743 states have (on average 2.1049798115746974) internal successors, (1564), 743 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:15:52,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1564 transitions. [2021-05-21 21:15:52,551 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 1564 transitions. Word has length 41 [2021-05-21 21:15:52,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:15:52,551 INFO L482 AbstractCegarLoop]: Abstraction has 744 states and 1564 transitions. [2021-05-21 21:15:52,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 37 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:15:52,552 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 1564 transitions. [2021-05-21 21:15:52,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-21 21:15:52,552 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:15:52,552 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:15:52,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2021-05-21 21:15:52,774 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:15:52,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:15:52,774 INFO L82 PathProgramCache]: Analyzing trace with hash -749611727, now seen corresponding path program 130 times [2021-05-21 21:15:52,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:15:52,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227637382] [2021-05-21 21:15:52,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:15:52,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:15:53,008 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 28 proven. 68 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:15:53,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:15:53,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227637382] [2021-05-21 21:15:53,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227637382] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:15:53,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20729220] [2021-05-21 21:15:53,009 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 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 [2021-05-21 21:15:53,032 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:15:53,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:15:53,033 WARN L261 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 61 conjunts are in the unsatisfiable core [2021-05-21 21:15:53,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:15:53,507 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:15:53,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20729220] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:15:53,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:15:53,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21] total 37 [2021-05-21 21:15:53,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079632142] [2021-05-21 21:15:53,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-21 21:15:53,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:15:53,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-21 21:15:53,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1214, Unknown=0, NotChecked=0, Total=1406 [2021-05-21 21:15:53,507 INFO L87 Difference]: Start difference. First operand 744 states and 1564 transitions. Second operand has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 37 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:15:54,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:15:54,742 INFO L93 Difference]: Finished difference Result 1254 states and 2587 transitions. [2021-05-21 21:15:54,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-21 21:15:54,742 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 37 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-05-21 21:15:54,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:15:54,743 INFO L225 Difference]: With dead ends: 1254 [2021-05-21 21:15:54,743 INFO L226 Difference]: Without dead ends: 1240 [2021-05-21 21:15:54,743 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1016 ImplicationChecksByTransitivity, 1178.1ms TimeCoverageRelationStatistics Valid=616, Invalid=3416, Unknown=0, NotChecked=0, Total=4032 [2021-05-21 21:15:54,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2021-05-21 21:15:54,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 653. [2021-05-21 21:15:54,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 652 states have (on average 2.1165644171779143) internal successors, (1380), 652 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:15:54,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 1380 transitions. [2021-05-21 21:15:54,749 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 1380 transitions. Word has length 41 [2021-05-21 21:15:54,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:15:54,750 INFO L482 AbstractCegarLoop]: Abstraction has 653 states and 1380 transitions. [2021-05-21 21:15:54,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 37 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:15:54,750 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 1380 transitions. [2021-05-21 21:15:54,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-21 21:15:54,750 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:15:54,750 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:15:54,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable304,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:15:54,951 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:15:54,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:15:54,951 INFO L82 PathProgramCache]: Analyzing trace with hash -2073348345, now seen corresponding path program 131 times [2021-05-21 21:15:54,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:15:54,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267023113] [2021-05-21 21:15:54,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:15:54,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:15:55,202 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:15:55,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:15:55,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267023113] [2021-05-21 21:15:55,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267023113] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:15:55,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255316833] [2021-05-21 21:15:55,202 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 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 [2021-05-21 21:15:55,228 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-05-21 21:15:55,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:15:55,229 WARN L261 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 61 conjunts are in the unsatisfiable core [2021-05-21 21:15:55,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:15:55,757 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:15:55,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255316833] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:15:55,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:15:55,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21] total 36 [2021-05-21 21:15:55,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250304582] [2021-05-21 21:15:55,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-21 21:15:55,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:15:55,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-21 21:15:55,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1176, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 21:15:55,758 INFO L87 Difference]: Start difference. First operand 653 states and 1380 transitions. Second operand has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:05,507 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 67 [2021-05-21 21:16:06,121 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 67 [2021-05-21 21:16:07,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:16:07,393 INFO L93 Difference]: Finished difference Result 2177 states and 4455 transitions. [2021-05-21 21:16:07,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 197 states. [2021-05-21 21:16:07,393 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-05-21 21:16:07,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:16:07,395 INFO L225 Difference]: With dead ends: 2177 [2021-05-21 21:16:07,395 INFO L226 Difference]: Without dead ends: 2151 [2021-05-21 21:16:07,396 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17707 ImplicationChecksByTransitivity, 10149.9ms TimeCoverageRelationStatistics Valid=4996, Invalid=38894, Unknown=0, NotChecked=0, Total=43890 [2021-05-21 21:16:07,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2151 states. [2021-05-21 21:16:07,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2151 to 701. [2021-05-21 21:16:07,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 701 states, 700 states have (on average 2.1085714285714285) internal successors, (1476), 700 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:07,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 1476 transitions. [2021-05-21 21:16:07,405 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 1476 transitions. Word has length 41 [2021-05-21 21:16:07,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:16:07,405 INFO L482 AbstractCegarLoop]: Abstraction has 701 states and 1476 transitions. [2021-05-21 21:16:07,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:07,405 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 1476 transitions. [2021-05-21 21:16:07,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-21 21:16:07,406 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:16:07,406 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:16:07,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2021-05-21 21:16:07,606 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:16:07,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:16:07,606 INFO L82 PathProgramCache]: Analyzing trace with hash 905857747, now seen corresponding path program 132 times [2021-05-21 21:16:07,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:16:07,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050106758] [2021-05-21 21:16:07,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:16:07,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:16:07,890 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:16:07,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:16:07,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050106758] [2021-05-21 21:16:07,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050106758] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:16:07,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906062542] [2021-05-21 21:16:07,891 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 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 [2021-05-21 21:16:07,918 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-05-21 21:16:07,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:16:07,919 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 60 conjunts are in the unsatisfiable core [2021-05-21 21:16:07,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:16:08,537 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:16:08,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906062542] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:16:08,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:16:08,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-05-21 21:16:08,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518993389] [2021-05-21 21:16:08,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-21 21:16:08,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:16:08,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-21 21:16:08,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1616, Unknown=0, NotChecked=0, Total=1806 [2021-05-21 21:16:08,538 INFO L87 Difference]: Start difference. First operand 701 states and 1476 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:11,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:16:11,057 INFO L93 Difference]: Finished difference Result 1425 states and 2940 transitions. [2021-05-21 21:16:11,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-05-21 21:16:11,057 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-05-21 21:16:11,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:16:11,058 INFO L225 Difference]: With dead ends: 1425 [2021-05-21 21:16:11,058 INFO L226 Difference]: Without dead ends: 1352 [2021-05-21 21:16:11,058 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2973 ImplicationChecksByTransitivity, 2638.4ms TimeCoverageRelationStatistics Valid=1356, Invalid=9564, Unknown=0, NotChecked=0, Total=10920 [2021-05-21 21:16:11,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1352 states. [2021-05-21 21:16:11,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1352 to 879. [2021-05-21 21:16:11,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 879 states, 878 states have (on average 2.1890660592255125) internal successors, (1922), 878 states have internal predecessors, (1922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:11,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 1922 transitions. [2021-05-21 21:16:11,067 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 1922 transitions. Word has length 43 [2021-05-21 21:16:11,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:16:11,067 INFO L482 AbstractCegarLoop]: Abstraction has 879 states and 1922 transitions. [2021-05-21 21:16:11,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:11,067 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 1922 transitions. [2021-05-21 21:16:11,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-21 21:16:11,067 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:16:11,067 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:16:11,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable306 [2021-05-21 21:16:11,281 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:16:11,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:16:11,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1027861339, now seen corresponding path program 133 times [2021-05-21 21:16:11,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:16:11,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123161084] [2021-05-21 21:16:11,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:16:11,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:16:11,568 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:16:11,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:16:11,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123161084] [2021-05-21 21:16:11,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123161084] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:16:11,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64843439] [2021-05-21 21:16:11,568 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 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 [2021-05-21 21:16:11,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:16:11,595 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-21 21:16:11,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:16:12,090 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:16:12,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64843439] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:16:12,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:16:12,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-05-21 21:16:12,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336813403] [2021-05-21 21:16:12,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-21 21:16:12,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:16:12,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-21 21:16:12,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1607, Unknown=0, NotChecked=0, Total=1806 [2021-05-21 21:16:12,091 INFO L87 Difference]: Start difference. First operand 879 states and 1922 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:14,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:16:14,493 INFO L93 Difference]: Finished difference Result 1463 states and 3003 transitions. [2021-05-21 21:16:14,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-05-21 21:16:14,493 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-05-21 21:16:14,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:16:14,494 INFO L225 Difference]: With dead ends: 1463 [2021-05-21 21:16:14,494 INFO L226 Difference]: Without dead ends: 1401 [2021-05-21 21:16:14,494 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3582 ImplicationChecksByTransitivity, 2398.9ms TimeCoverageRelationStatistics Valid=1457, Invalid=10533, Unknown=0, NotChecked=0, Total=11990 [2021-05-21 21:16:14,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1401 states. [2021-05-21 21:16:14,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1401 to 881. [2021-05-21 21:16:14,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 881 states, 880 states have (on average 2.1886363636363635) internal successors, (1926), 880 states have internal predecessors, (1926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:14,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 881 states to 881 states and 1926 transitions. [2021-05-21 21:16:14,503 INFO L78 Accepts]: Start accepts. Automaton has 881 states and 1926 transitions. Word has length 43 [2021-05-21 21:16:14,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:16:14,503 INFO L482 AbstractCegarLoop]: Abstraction has 881 states and 1926 transitions. [2021-05-21 21:16:14,503 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:14,503 INFO L276 IsEmpty]: Start isEmpty. Operand 881 states and 1926 transitions. [2021-05-21 21:16:14,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-21 21:16:14,503 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:16:14,504 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:16:14,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable320 [2021-05-21 21:16:14,704 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:16:14,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:16:14,704 INFO L82 PathProgramCache]: Analyzing trace with hash -475713121, now seen corresponding path program 134 times [2021-05-21 21:16:14,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:16:14,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912148001] [2021-05-21 21:16:14,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:16:14,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:16:14,993 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:16:14,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:16:14,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912148001] [2021-05-21 21:16:14,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912148001] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:16:14,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436558793] [2021-05-21 21:16:14,993 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 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 [2021-05-21 21:16:15,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:16:15,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:16:15,019 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-21 21:16:15,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:16:15,492 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:16:15,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436558793] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:16:15,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:16:15,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-05-21 21:16:15,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220844092] [2021-05-21 21:16:15,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-21 21:16:15,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:16:15,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-21 21:16:15,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1611, Unknown=0, NotChecked=0, Total=1806 [2021-05-21 21:16:15,493 INFO L87 Difference]: Start difference. First operand 881 states and 1926 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:18,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:16:18,140 INFO L93 Difference]: Finished difference Result 1461 states and 3001 transitions. [2021-05-21 21:16:18,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-05-21 21:16:18,140 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-05-21 21:16:18,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:16:18,141 INFO L225 Difference]: With dead ends: 1461 [2021-05-21 21:16:18,141 INFO L226 Difference]: Without dead ends: 1405 [2021-05-21 21:16:18,142 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3969 ImplicationChecksByTransitivity, 2492.1ms TimeCoverageRelationStatistics Valid=1554, Invalid=11556, Unknown=0, NotChecked=0, Total=13110 [2021-05-21 21:16:18,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1405 states. [2021-05-21 21:16:18,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1405 to 883. [2021-05-21 21:16:18,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 883 states, 882 states have (on average 2.188208616780045) internal successors, (1930), 882 states have internal predecessors, (1930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:18,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1930 transitions. [2021-05-21 21:16:18,155 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1930 transitions. Word has length 43 [2021-05-21 21:16:18,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:16:18,156 INFO L482 AbstractCegarLoop]: Abstraction has 883 states and 1930 transitions. [2021-05-21 21:16:18,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:18,156 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1930 transitions. [2021-05-21 21:16:18,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-21 21:16:18,156 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:16:18,156 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:16:18,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2021-05-21 21:16:18,358 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:16:18,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:16:18,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1667971299, now seen corresponding path program 135 times [2021-05-21 21:16:18,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:16:18,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4928414] [2021-05-21 21:16:18,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:16:18,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:16:18,641 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:16:18,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:16:18,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4928414] [2021-05-21 21:16:18,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4928414] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:16:18,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285857759] [2021-05-21 21:16:18,641 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 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 [2021-05-21 21:16:18,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-05-21 21:16:18,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:16:18,671 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-21 21:16:18,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:16:19,145 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:16:19,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285857759] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:16:19,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:16:19,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-05-21 21:16:19,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190390658] [2021-05-21 21:16:19,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-21 21:16:19,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:16:19,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-21 21:16:19,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1611, Unknown=0, NotChecked=0, Total=1806 [2021-05-21 21:16:19,146 INFO L87 Difference]: Start difference. First operand 883 states and 1930 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:21,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:16:21,845 INFO L93 Difference]: Finished difference Result 1459 states and 2999 transitions. [2021-05-21 21:16:21,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-05-21 21:16:21,845 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-05-21 21:16:21,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:16:21,846 INFO L225 Difference]: With dead ends: 1459 [2021-05-21 21:16:21,846 INFO L226 Difference]: Without dead ends: 1409 [2021-05-21 21:16:21,847 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4376 ImplicationChecksByTransitivity, 2609.4ms TimeCoverageRelationStatistics Valid=1676, Invalid=12604, Unknown=0, NotChecked=0, Total=14280 [2021-05-21 21:16:21,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1409 states. [2021-05-21 21:16:21,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1409 to 885. [2021-05-21 21:16:21,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 884 states have (on average 2.1877828054298645) internal successors, (1934), 884 states have internal predecessors, (1934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:21,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 1934 transitions. [2021-05-21 21:16:21,860 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 1934 transitions. Word has length 43 [2021-05-21 21:16:21,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:16:21,860 INFO L482 AbstractCegarLoop]: Abstraction has 885 states and 1934 transitions. [2021-05-21 21:16:21,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:21,860 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 1934 transitions. [2021-05-21 21:16:21,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-21 21:16:21,861 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:16:21,861 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:16:22,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2021-05-21 21:16:22,061 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:16:22,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:16:22,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1596833497, now seen corresponding path program 136 times [2021-05-21 21:16:22,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:16:22,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248326851] [2021-05-21 21:16:22,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:16:22,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:16:22,343 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:16:22,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:16:22,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248326851] [2021-05-21 21:16:22,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248326851] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:16:22,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001107761] [2021-05-21 21:16:22,344 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:16:22,368 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:16:22,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:16:22,369 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-21 21:16:22,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:16:22,841 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:16:22,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001107761] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:16:22,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:16:22,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-05-21 21:16:22,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312502901] [2021-05-21 21:16:22,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-21 21:16:22,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:16:22,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-21 21:16:22,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1607, Unknown=0, NotChecked=0, Total=1806 [2021-05-21 21:16:22,842 INFO L87 Difference]: Start difference. First operand 885 states and 1934 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:25,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:16:25,748 INFO L93 Difference]: Finished difference Result 1457 states and 2997 transitions. [2021-05-21 21:16:25,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-05-21 21:16:25,749 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-05-21 21:16:25,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:16:25,750 INFO L225 Difference]: With dead ends: 1457 [2021-05-21 21:16:25,750 INFO L226 Difference]: Without dead ends: 1413 [2021-05-21 21:16:25,750 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4799 ImplicationChecksByTransitivity, 2722.3ms TimeCoverageRelationStatistics Valid=1823, Invalid=13677, Unknown=0, NotChecked=0, Total=15500 [2021-05-21 21:16:25,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1413 states. [2021-05-21 21:16:25,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1413 to 887. [2021-05-21 21:16:25,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 886 states have (on average 2.1873589164785554) internal successors, (1938), 886 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:25,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 1938 transitions. [2021-05-21 21:16:25,759 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 1938 transitions. Word has length 43 [2021-05-21 21:16:25,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:16:25,759 INFO L482 AbstractCegarLoop]: Abstraction has 887 states and 1938 transitions. [2021-05-21 21:16:25,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:25,759 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 1938 transitions. [2021-05-21 21:16:25,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-21 21:16:25,760 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:16:25,760 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:16:25,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2021-05-21 21:16:25,960 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:16:25,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:16:25,960 INFO L82 PathProgramCache]: Analyzing trace with hash -500790677, now seen corresponding path program 137 times [2021-05-21 21:16:25,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:16:25,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966422229] [2021-05-21 21:16:25,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:16:25,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:16:26,243 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:16:26,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:16:26,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966422229] [2021-05-21 21:16:26,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966422229] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:16:26,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425508069] [2021-05-21 21:16:26,244 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:16:26,271 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-21 21:16:26,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:16:26,272 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-21 21:16:26,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:16:26,743 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:16:26,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425508069] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:16:26,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:16:26,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-05-21 21:16:26,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908717100] [2021-05-21 21:16:26,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-21 21:16:26,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:16:26,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-21 21:16:26,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1599, Unknown=0, NotChecked=0, Total=1806 [2021-05-21 21:16:26,744 INFO L87 Difference]: Start difference. First operand 887 states and 1938 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:29,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:16:29,740 INFO L93 Difference]: Finished difference Result 1457 states and 2999 transitions. [2021-05-21 21:16:29,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-05-21 21:16:29,740 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-05-21 21:16:29,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:16:29,741 INFO L225 Difference]: With dead ends: 1457 [2021-05-21 21:16:29,741 INFO L226 Difference]: Without dead ends: 1419 [2021-05-21 21:16:29,742 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5238 ImplicationChecksByTransitivity, 2883.6ms TimeCoverageRelationStatistics Valid=1995, Invalid=14775, Unknown=0, NotChecked=0, Total=16770 [2021-05-21 21:16:29,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1419 states. [2021-05-21 21:16:29,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1419 to 889. [2021-05-21 21:16:29,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 888 states have (on average 2.186936936936937) internal successors, (1942), 888 states have internal predecessors, (1942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:29,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 1942 transitions. [2021-05-21 21:16:29,750 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 1942 transitions. Word has length 43 [2021-05-21 21:16:29,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:16:29,750 INFO L482 AbstractCegarLoop]: Abstraction has 889 states and 1942 transitions. [2021-05-21 21:16:29,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:29,750 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 1942 transitions. [2021-05-21 21:16:29,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-21 21:16:29,751 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:16:29,751 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:16:29,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable324 [2021-05-21 21:16:29,969 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:16:29,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:16:29,969 INFO L82 PathProgramCache]: Analyzing trace with hash 331633839, now seen corresponding path program 138 times [2021-05-21 21:16:29,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:16:29,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389805286] [2021-05-21 21:16:29,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:16:29,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:16:30,283 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:16:30,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:16:30,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389805286] [2021-05-21 21:16:30,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389805286] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:16:30,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876055720] [2021-05-21 21:16:30,283 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:16:30,310 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-05-21 21:16:30,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:16:30,311 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-21 21:16:30,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:16:30,830 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:16:30,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876055720] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:16:30,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:16:30,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-05-21 21:16:30,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905580276] [2021-05-21 21:16:30,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-21 21:16:30,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:16:30,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-21 21:16:30,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1584, Unknown=0, NotChecked=0, Total=1806 [2021-05-21 21:16:30,831 INFO L87 Difference]: Start difference. First operand 889 states and 1942 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:34,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:16:34,227 INFO L93 Difference]: Finished difference Result 1520 states and 3112 transitions. [2021-05-21 21:16:34,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-05-21 21:16:34,227 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-05-21 21:16:34,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:16:34,228 INFO L225 Difference]: With dead ends: 1520 [2021-05-21 21:16:34,228 INFO L226 Difference]: Without dead ends: 1475 [2021-05-21 21:16:34,229 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5546 ImplicationChecksByTransitivity, 3247.4ms TimeCoverageRelationStatistics Valid=2173, Invalid=15649, Unknown=0, NotChecked=0, Total=17822 [2021-05-21 21:16:34,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1475 states. [2021-05-21 21:16:34,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1475 to 892. [2021-05-21 21:16:34,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 891 states have (on average 2.1885521885521886) internal successors, (1950), 891 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:34,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 1950 transitions. [2021-05-21 21:16:34,244 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 1950 transitions. Word has length 43 [2021-05-21 21:16:34,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:16:34,244 INFO L482 AbstractCegarLoop]: Abstraction has 892 states and 1950 transitions. [2021-05-21 21:16:34,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:34,244 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 1950 transitions. [2021-05-21 21:16:34,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-21 21:16:34,245 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:16:34,245 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:16:34,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable325 [2021-05-21 21:16:34,445 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:16:34,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:16:34,446 INFO L82 PathProgramCache]: Analyzing trace with hash -933294021, now seen corresponding path program 139 times [2021-05-21 21:16:34,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:16:34,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882718538] [2021-05-21 21:16:34,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:16:34,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:16:34,765 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:16:34,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:16:34,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882718538] [2021-05-21 21:16:34,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882718538] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:16:34,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757382225] [2021-05-21 21:16:34,765 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:16:34,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:16:34,792 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-21 21:16:34,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:16:35,272 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:16:35,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757382225] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:16:35,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:16:35,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-05-21 21:16:35,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537075079] [2021-05-21 21:16:35,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-21 21:16:35,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:16:35,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-21 21:16:35,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1582, Unknown=0, NotChecked=0, Total=1806 [2021-05-21 21:16:35,273 INFO L87 Difference]: Start difference. First operand 892 states and 1950 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:38,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:16:38,349 INFO L93 Difference]: Finished difference Result 1310 states and 2689 transitions. [2021-05-21 21:16:38,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-05-21 21:16:38,349 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-05-21 21:16:38,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:16:38,350 INFO L225 Difference]: With dead ends: 1310 [2021-05-21 21:16:38,350 INFO L226 Difference]: Without dead ends: 1290 [2021-05-21 21:16:38,351 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4570 ImplicationChecksByTransitivity, 2914.0ms TimeCoverageRelationStatistics Valid=1991, Invalid=13015, Unknown=0, NotChecked=0, Total=15006 [2021-05-21 21:16:38,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1290 states. [2021-05-21 21:16:38,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1290 to 893. [2021-05-21 21:16:38,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 2.188340807174888) internal successors, (1952), 892 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:38,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 1952 transitions. [2021-05-21 21:16:38,359 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 1952 transitions. Word has length 43 [2021-05-21 21:16:38,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:16:38,359 INFO L482 AbstractCegarLoop]: Abstraction has 893 states and 1952 transitions. [2021-05-21 21:16:38,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:38,359 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 1952 transitions. [2021-05-21 21:16:38,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-21 21:16:38,360 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:16:38,360 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:16:38,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable326 [2021-05-21 21:16:38,560 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:16:38,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:16:38,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1154201253, now seen corresponding path program 140 times [2021-05-21 21:16:38,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:16:38,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681748061] [2021-05-21 21:16:38,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:16:38,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:16:38,840 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:16:38,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:16:38,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681748061] [2021-05-21 21:16:38,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681748061] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:16:38,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248292430] [2021-05-21 21:16:38,840 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:16:38,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:16:38,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:16:38,866 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-21 21:16:38,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:16:39,379 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:16:39,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248292430] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:16:39,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:16:39,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-05-21 21:16:39,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118415472] [2021-05-21 21:16:39,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-21 21:16:39,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:16:39,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-21 21:16:39,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1600, Unknown=0, NotChecked=0, Total=1806 [2021-05-21 21:16:39,380 INFO L87 Difference]: Start difference. First operand 893 states and 1952 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:41,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:16:41,861 INFO L93 Difference]: Finished difference Result 1424 states and 2924 transitions. [2021-05-21 21:16:41,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-05-21 21:16:41,862 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-05-21 21:16:41,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:16:41,863 INFO L225 Difference]: With dead ends: 1424 [2021-05-21 21:16:41,863 INFO L226 Difference]: Without dead ends: 1368 [2021-05-21 21:16:41,863 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3626 ImplicationChecksByTransitivity, 2359.0ms TimeCoverageRelationStatistics Valid=1364, Invalid=10626, Unknown=0, NotChecked=0, Total=11990 [2021-05-21 21:16:41,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1368 states. [2021-05-21 21:16:41,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1368 to 899. [2021-05-21 21:16:41,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 2.1870824053452114) internal successors, (1964), 898 states have internal predecessors, (1964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:41,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 1964 transitions. [2021-05-21 21:16:41,871 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 1964 transitions. Word has length 43 [2021-05-21 21:16:41,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:16:41,871 INFO L482 AbstractCegarLoop]: Abstraction has 899 states and 1964 transitions. [2021-05-21 21:16:41,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:41,871 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 1964 transitions. [2021-05-21 21:16:41,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-21 21:16:41,872 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:16:41,872 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:16:42,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable327,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:16:42,072 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:16:42,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:16:42,072 INFO L82 PathProgramCache]: Analyzing trace with hash -997081623, now seen corresponding path program 141 times [2021-05-21 21:16:42,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:16:42,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592394133] [2021-05-21 21:16:42,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:16:42,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:16:42,349 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:16:42,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:16:42,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592394133] [2021-05-21 21:16:42,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592394133] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:16:42,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577615100] [2021-05-21 21:16:42,350 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:16:42,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-05-21 21:16:42,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:16:42,379 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-21 21:16:42,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:16:42,851 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:16:42,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577615100] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:16:42,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:16:42,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-05-21 21:16:42,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211920618] [2021-05-21 21:16:42,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-21 21:16:42,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:16:42,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-21 21:16:42,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1600, Unknown=0, NotChecked=0, Total=1806 [2021-05-21 21:16:42,852 INFO L87 Difference]: Start difference. First operand 899 states and 1964 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:45,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:16:45,609 INFO L93 Difference]: Finished difference Result 1429 states and 2948 transitions. [2021-05-21 21:16:45,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-05-21 21:16:45,609 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-05-21 21:16:45,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:16:45,610 INFO L225 Difference]: With dead ends: 1429 [2021-05-21 21:16:45,610 INFO L226 Difference]: Without dead ends: 1379 [2021-05-21 21:16:45,611 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4011 ImplicationChecksByTransitivity, 2436.3ms TimeCoverageRelationStatistics Valid=1495, Invalid=11615, Unknown=0, NotChecked=0, Total=13110 [2021-05-21 21:16:45,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1379 states. [2021-05-21 21:16:45,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1379 to 909. [2021-05-21 21:16:45,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 909 states, 908 states have (on average 2.193832599118943) internal successors, (1992), 908 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:45,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 909 states to 909 states and 1992 transitions. [2021-05-21 21:16:45,619 INFO L78 Accepts]: Start accepts. Automaton has 909 states and 1992 transitions. Word has length 43 [2021-05-21 21:16:45,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:16:45,619 INFO L482 AbstractCegarLoop]: Abstraction has 909 states and 1992 transitions. [2021-05-21 21:16:45,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:45,619 INFO L276 IsEmpty]: Start isEmpty. Operand 909 states and 1992 transitions. [2021-05-21 21:16:45,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-21 21:16:45,620 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:16:45,620 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:16:45,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:16:45,820 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:16:45,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:16:45,820 INFO L82 PathProgramCache]: Analyzing trace with hash 33080877, now seen corresponding path program 142 times [2021-05-21 21:16:45,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:16:45,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072489578] [2021-05-21 21:16:45,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:16:45,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:16:46,099 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:16:46,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:16:46,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072489578] [2021-05-21 21:16:46,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072489578] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:16:46,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361230340] [2021-05-21 21:16:46,099 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:16:46,124 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:16:46,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:16:46,125 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-21 21:16:46,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:16:46,607 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:16:46,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361230340] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:16:46,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:16:46,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-05-21 21:16:46,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251279685] [2021-05-21 21:16:46,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-21 21:16:46,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:16:46,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-21 21:16:46,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1596, Unknown=0, NotChecked=0, Total=1806 [2021-05-21 21:16:46,608 INFO L87 Difference]: Start difference. First operand 909 states and 1992 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:49,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:16:49,326 INFO L93 Difference]: Finished difference Result 1441 states and 2986 transitions. [2021-05-21 21:16:49,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-05-21 21:16:49,326 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-05-21 21:16:49,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:16:49,327 INFO L225 Difference]: With dead ends: 1441 [2021-05-21 21:16:49,327 INFO L226 Difference]: Without dead ends: 1397 [2021-05-21 21:16:49,328 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4409 ImplicationChecksByTransitivity, 2572.2ms TimeCoverageRelationStatistics Valid=1642, Invalid=12638, Unknown=0, NotChecked=0, Total=14280 [2021-05-21 21:16:49,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1397 states. [2021-05-21 21:16:49,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1397 to 919. [2021-05-21 21:16:49,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 2.2004357298474946) internal successors, (2020), 918 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:49,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 2020 transitions. [2021-05-21 21:16:49,336 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 2020 transitions. Word has length 43 [2021-05-21 21:16:49,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:16:49,336 INFO L482 AbstractCegarLoop]: Abstraction has 919 states and 2020 transitions. [2021-05-21 21:16:49,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:49,336 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 2020 transitions. [2021-05-21 21:16:49,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-21 21:16:49,337 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:16:49,337 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:16:49,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable329 [2021-05-21 21:16:49,538 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:16:49,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:16:49,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1129123697, now seen corresponding path program 143 times [2021-05-21 21:16:49,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:16:49,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985517183] [2021-05-21 21:16:49,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:16:49,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:16:49,814 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:16:49,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:16:49,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985517183] [2021-05-21 21:16:49,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985517183] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:16:49,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608220038] [2021-05-21 21:16:49,815 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:16:49,841 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-21 21:16:49,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:16:49,842 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-21 21:16:49,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:16:50,323 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:16:50,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608220038] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:16:50,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:16:50,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-05-21 21:16:50,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568405951] [2021-05-21 21:16:50,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-21 21:16:50,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:16:50,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-21 21:16:50,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1588, Unknown=0, NotChecked=0, Total=1806 [2021-05-21 21:16:50,324 INFO L87 Difference]: Start difference. First operand 919 states and 2020 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:53,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:16:53,399 INFO L93 Difference]: Finished difference Result 1453 states and 3024 transitions. [2021-05-21 21:16:53,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-05-21 21:16:53,399 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-05-21 21:16:53,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:16:53,401 INFO L225 Difference]: With dead ends: 1453 [2021-05-21 21:16:53,401 INFO L226 Difference]: Without dead ends: 1415 [2021-05-21 21:16:53,401 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4823 ImplicationChecksByTransitivity, 2703.7ms TimeCoverageRelationStatistics Valid=1814, Invalid=13686, Unknown=0, NotChecked=0, Total=15500 [2021-05-21 21:16:53,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1415 states. [2021-05-21 21:16:53,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1415 to 929. [2021-05-21 21:16:53,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 928 states have (on average 2.206896551724138) internal successors, (2048), 928 states have internal predecessors, (2048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:53,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 2048 transitions. [2021-05-21 21:16:53,410 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 2048 transitions. Word has length 43 [2021-05-21 21:16:53,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:16:53,410 INFO L482 AbstractCegarLoop]: Abstraction has 929 states and 2048 transitions. [2021-05-21 21:16:53,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:53,410 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 2048 transitions. [2021-05-21 21:16:53,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-21 21:16:53,411 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:16:53,411 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:16:53,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable330,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:16:53,612 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:16:53,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:16:53,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1961548213, now seen corresponding path program 144 times [2021-05-21 21:16:53,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:16:53,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907323370] [2021-05-21 21:16:53,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:16:53,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:16:53,947 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:16:53,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:16:53,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907323370] [2021-05-21 21:16:53,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907323370] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:16:53,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10772032] [2021-05-21 21:16:53,947 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:16:53,981 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-05-21 21:16:53,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:16:53,982 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-21 21:16:53,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:16:54,460 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:16:54,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10772032] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:16:54,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:16:54,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-05-21 21:16:54,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602915295] [2021-05-21 21:16:54,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-21 21:16:54,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:16:54,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-21 21:16:54,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1573, Unknown=0, NotChecked=0, Total=1806 [2021-05-21 21:16:54,461 INFO L87 Difference]: Start difference. First operand 929 states and 2048 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:57,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:16:57,811 INFO L93 Difference]: Finished difference Result 1551 states and 3204 transitions. [2021-05-21 21:16:57,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-05-21 21:16:57,812 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-05-21 21:16:57,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:16:57,813 INFO L225 Difference]: With dead ends: 1551 [2021-05-21 21:16:57,813 INFO L226 Difference]: Without dead ends: 1506 [2021-05-21 21:16:57,813 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5113 ImplicationChecksByTransitivity, 3046.6ms TimeCoverageRelationStatistics Valid=1995, Invalid=14517, Unknown=0, NotChecked=0, Total=16512 [2021-05-21 21:16:57,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2021-05-21 21:16:57,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 933. [2021-05-21 21:16:57,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 933 states, 932 states have (on average 2.209227467811159) internal successors, (2059), 932 states have internal predecessors, (2059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:57,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 933 states to 933 states and 2059 transitions. [2021-05-21 21:16:57,822 INFO L78 Accepts]: Start accepts. Automaton has 933 states and 2059 transitions. Word has length 43 [2021-05-21 21:16:57,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:16:57,822 INFO L482 AbstractCegarLoop]: Abstraction has 933 states and 2059 transitions. [2021-05-21 21:16:57,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:16:57,822 INFO L276 IsEmpty]: Start isEmpty. Operand 933 states and 2059 transitions. [2021-05-21 21:16:57,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-21 21:16:57,823 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:16:57,823 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:16:58,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable331 [2021-05-21 21:16:58,024 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:16:58,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:16:58,024 INFO L82 PathProgramCache]: Analyzing trace with hash 696620353, now seen corresponding path program 145 times [2021-05-21 21:16:58,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:16:58,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081807769] [2021-05-21 21:16:58,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:16:58,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:16:58,340 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:16:58,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:16:58,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081807769] [2021-05-21 21:16:58,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081807769] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:16:58,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687929870] [2021-05-21 21:16:58,340 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:16:58,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:16:58,366 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-21 21:16:58,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:16:58,857 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:16:58,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687929870] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:16:58,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:16:58,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-05-21 21:16:58,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101102895] [2021-05-21 21:16:58,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-21 21:16:58,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:16:58,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-21 21:16:58,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1571, Unknown=0, NotChecked=0, Total=1806 [2021-05-21 21:16:58,858 INFO L87 Difference]: Start difference. First operand 933 states and 2059 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:01,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:17:01,792 INFO L93 Difference]: Finished difference Result 1369 states and 2846 transitions. [2021-05-21 21:17:01,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-05-21 21:17:01,792 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-05-21 21:17:01,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:17:01,793 INFO L225 Difference]: With dead ends: 1369 [2021-05-21 21:17:01,793 INFO L226 Difference]: Without dead ends: 1342 [2021-05-21 21:17:01,794 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4340 ImplicationChecksByTransitivity, 2841.1ms TimeCoverageRelationStatistics Valid=1899, Invalid=12381, Unknown=0, NotChecked=0, Total=14280 [2021-05-21 21:17:01,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1342 states. [2021-05-21 21:17:01,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1342 to 901. [2021-05-21 21:17:01,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 901 states, 900 states have (on average 2.1933333333333334) internal successors, (1974), 900 states have internal predecessors, (1974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:01,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 901 states to 901 states and 1974 transitions. [2021-05-21 21:17:01,802 INFO L78 Accepts]: Start accepts. Automaton has 901 states and 1974 transitions. Word has length 43 [2021-05-21 21:17:01,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:17:01,802 INFO L482 AbstractCegarLoop]: Abstraction has 901 states and 1974 transitions. [2021-05-21 21:17:01,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:01,802 INFO L276 IsEmpty]: Start isEmpty. Operand 901 states and 1974 transitions. [2021-05-21 21:17:01,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-21 21:17:01,802 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:17:01,803 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:17:02,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable332 [2021-05-21 21:17:02,003 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:17:02,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:17:02,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1503474267, now seen corresponding path program 146 times [2021-05-21 21:17:02,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:17:02,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061718623] [2021-05-21 21:17:02,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:17:02,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:17:02,251 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:17:02,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:17:02,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061718623] [2021-05-21 21:17:02,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061718623] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:17:02,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003058268] [2021-05-21 21:17:02,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:17:02,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:17:02,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:17:02,277 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-21 21:17:02,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:17:02,759 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:17:02,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003058268] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:17:02,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:17:02,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-05-21 21:17:02,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384297876] [2021-05-21 21:17:02,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-21 21:17:02,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:17:02,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-21 21:17:02,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1598, Unknown=0, NotChecked=0, Total=1806 [2021-05-21 21:17:02,759 INFO L87 Difference]: Start difference. First operand 901 states and 1974 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:05,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:17:05,287 INFO L93 Difference]: Finished difference Result 1397 states and 2882 transitions. [2021-05-21 21:17:05,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-05-21 21:17:05,287 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-05-21 21:17:05,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:17:05,288 INFO L225 Difference]: With dead ends: 1397 [2021-05-21 21:17:05,289 INFO L226 Difference]: Without dead ends: 1347 [2021-05-21 21:17:05,289 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4136 ImplicationChecksByTransitivity, 2412.4ms TimeCoverageRelationStatistics Valid=1473, Invalid=11867, Unknown=0, NotChecked=0, Total=13340 [2021-05-21 21:17:05,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1347 states. [2021-05-21 21:17:05,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1347 to 905. [2021-05-21 21:17:05,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 904 states have (on average 2.1924778761061945) internal successors, (1982), 904 states have internal predecessors, (1982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:05,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1982 transitions. [2021-05-21 21:17:05,297 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1982 transitions. Word has length 43 [2021-05-21 21:17:05,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:17:05,297 INFO L482 AbstractCegarLoop]: Abstraction has 905 states and 1982 transitions. [2021-05-21 21:17:05,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:05,297 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1982 transitions. [2021-05-21 21:17:05,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-21 21:17:05,298 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:17:05,298 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:17:05,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2021-05-21 21:17:05,499 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:17:05,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:17:05,499 INFO L82 PathProgramCache]: Analyzing trace with hash -473311767, now seen corresponding path program 147 times [2021-05-21 21:17:05,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:17:05,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977829539] [2021-05-21 21:17:05,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:17:05,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:17:05,777 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:17:05,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:17:05,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977829539] [2021-05-21 21:17:05,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977829539] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:17:05,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058881930] [2021-05-21 21:17:05,778 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:17:05,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-05-21 21:17:05,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:17:05,807 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-21 21:17:05,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:17:06,294 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:17:06,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058881930] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:17:06,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:17:06,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-05-21 21:17:06,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970825342] [2021-05-21 21:17:06,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-21 21:17:06,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:17:06,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-21 21:17:06,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1592, Unknown=0, NotChecked=0, Total=1806 [2021-05-21 21:17:06,295 INFO L87 Difference]: Start difference. First operand 905 states and 1982 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:09,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:17:09,047 INFO L93 Difference]: Finished difference Result 1410 states and 2922 transitions. [2021-05-21 21:17:09,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-05-21 21:17:09,048 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-05-21 21:17:09,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:17:09,049 INFO L225 Difference]: With dead ends: 1410 [2021-05-21 21:17:09,049 INFO L226 Difference]: Without dead ends: 1366 [2021-05-21 21:17:09,049 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4542 ImplicationChecksByTransitivity, 2612.6ms TimeCoverageRelationStatistics Valid=1643, Invalid=12877, Unknown=0, NotChecked=0, Total=14520 [2021-05-21 21:17:09,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1366 states. [2021-05-21 21:17:09,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1366 to 915. [2021-05-21 21:17:09,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 915 states, 914 states have (on average 2.199124726477024) internal successors, (2010), 914 states have internal predecessors, (2010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:09,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 915 states to 915 states and 2010 transitions. [2021-05-21 21:17:09,057 INFO L78 Accepts]: Start accepts. Automaton has 915 states and 2010 transitions. Word has length 43 [2021-05-21 21:17:09,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:17:09,057 INFO L482 AbstractCegarLoop]: Abstraction has 915 states and 2010 transitions. [2021-05-21 21:17:09,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:09,058 INFO L276 IsEmpty]: Start isEmpty. Operand 915 states and 2010 transitions. [2021-05-21 21:17:09,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-21 21:17:09,058 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:17:09,058 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:17:09,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable334 [2021-05-21 21:17:09,261 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:17:09,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:17:09,261 INFO L82 PathProgramCache]: Analyzing trace with hash 622731053, now seen corresponding path program 148 times [2021-05-21 21:17:09,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:17:09,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776448269] [2021-05-21 21:17:09,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:17:09,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:17:09,553 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:17:09,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:17:09,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776448269] [2021-05-21 21:17:09,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776448269] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:17:09,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354612097] [2021-05-21 21:17:09,554 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:17:09,578 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:17:09,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:17:09,579 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-21 21:17:09,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:17:10,071 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:17:10,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354612097] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:17:10,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:17:10,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-05-21 21:17:10,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105617559] [2021-05-21 21:17:10,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-21 21:17:10,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:17:10,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-21 21:17:10,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1584, Unknown=0, NotChecked=0, Total=1806 [2021-05-21 21:17:10,072 INFO L87 Difference]: Start difference. First operand 915 states and 2010 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:13,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:17:13,217 INFO L93 Difference]: Finished difference Result 1428 states and 2972 transitions. [2021-05-21 21:17:13,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-05-21 21:17:13,218 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-05-21 21:17:13,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:17:13,219 INFO L225 Difference]: With dead ends: 1428 [2021-05-21 21:17:13,219 INFO L226 Difference]: Without dead ends: 1390 [2021-05-21 21:17:13,220 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4957 ImplicationChecksByTransitivity, 2770.3ms TimeCoverageRelationStatistics Valid=1824, Invalid=13926, Unknown=0, NotChecked=0, Total=15750 [2021-05-21 21:17:13,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1390 states. [2021-05-21 21:17:13,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1390 to 925. [2021-05-21 21:17:13,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 925 states, 924 states have (on average 2.205627705627706) internal successors, (2038), 924 states have internal predecessors, (2038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:13,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 925 states to 925 states and 2038 transitions. [2021-05-21 21:17:13,228 INFO L78 Accepts]: Start accepts. Automaton has 925 states and 2038 transitions. Word has length 43 [2021-05-21 21:17:13,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:17:13,228 INFO L482 AbstractCegarLoop]: Abstraction has 925 states and 2038 transitions. [2021-05-21 21:17:13,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:13,228 INFO L276 IsEmpty]: Start isEmpty. Operand 925 states and 2038 transitions. [2021-05-21 21:17:13,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-21 21:17:13,229 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:17:13,229 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:17:13,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable335 [2021-05-21 21:17:13,429 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:17:13,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:17:13,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1455155569, now seen corresponding path program 149 times [2021-05-21 21:17:13,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:17:13,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884461689] [2021-05-21 21:17:13,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:17:13,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:17:13,752 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:17:13,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:17:13,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884461689] [2021-05-21 21:17:13,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884461689] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:17:13,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318968333] [2021-05-21 21:17:13,753 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:17:13,779 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-21 21:17:13,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:17:13,780 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-21 21:17:13,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:17:14,260 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:17:14,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318968333] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:17:14,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:17:14,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-05-21 21:17:14,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460300361] [2021-05-21 21:17:14,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-21 21:17:14,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:17:14,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-21 21:17:14,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1569, Unknown=0, NotChecked=0, Total=1806 [2021-05-21 21:17:14,261 INFO L87 Difference]: Start difference. First operand 925 states and 2038 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:17,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:17:17,442 INFO L93 Difference]: Finished difference Result 1532 states and 3164 transitions. [2021-05-21 21:17:17,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-05-21 21:17:17,443 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-05-21 21:17:17,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:17:17,444 INFO L225 Difference]: With dead ends: 1532 [2021-05-21 21:17:17,444 INFO L226 Difference]: Without dead ends: 1487 [2021-05-21 21:17:17,444 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5247 ImplicationChecksByTransitivity, 3074.9ms TimeCoverageRelationStatistics Valid=2014, Invalid=14756, Unknown=0, NotChecked=0, Total=16770 [2021-05-21 21:17:17,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1487 states. [2021-05-21 21:17:17,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1487 to 929. [2021-05-21 21:17:17,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 928 states have (on average 2.2079741379310347) internal successors, (2049), 928 states have internal predecessors, (2049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:17,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 2049 transitions. [2021-05-21 21:17:17,453 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 2049 transitions. Word has length 43 [2021-05-21 21:17:17,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:17:17,453 INFO L482 AbstractCegarLoop]: Abstraction has 929 states and 2049 transitions. [2021-05-21 21:17:17,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:17,453 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 2049 transitions. [2021-05-21 21:17:17,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-21 21:17:17,454 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:17:17,454 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:17:17,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable336 [2021-05-21 21:17:17,654 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:17:17,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:17:17,655 INFO L82 PathProgramCache]: Analyzing trace with hash 190227709, now seen corresponding path program 150 times [2021-05-21 21:17:17,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:17:17,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758972917] [2021-05-21 21:17:17,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:17:17,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:17:17,973 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:17:17,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:17:17,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758972917] [2021-05-21 21:17:17,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758972917] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:17:17,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058861126] [2021-05-21 21:17:17,973 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:17:18,000 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-05-21 21:17:18,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:17:18,001 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 63 conjunts are in the unsatisfiable core [2021-05-21 21:17:18,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:17:18,549 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:17:18,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058861126] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:17:18,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:17:18,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-05-21 21:17:18,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626461168] [2021-05-21 21:17:18,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-21 21:17:18,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:17:18,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-21 21:17:18,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=1575, Unknown=0, NotChecked=0, Total=1806 [2021-05-21 21:17:18,549 INFO L87 Difference]: Start difference. First operand 929 states and 2049 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:21,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:17:21,720 INFO L93 Difference]: Finished difference Result 1359 states and 2823 transitions. [2021-05-21 21:17:21,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-05-21 21:17:21,720 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-05-21 21:17:21,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:17:21,722 INFO L225 Difference]: With dead ends: 1359 [2021-05-21 21:17:21,722 INFO L226 Difference]: Without dead ends: 1332 [2021-05-21 21:17:21,722 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4383 ImplicationChecksByTransitivity, 3064.7ms TimeCoverageRelationStatistics Valid=1914, Invalid=12606, Unknown=0, NotChecked=0, Total=14520 [2021-05-21 21:17:21,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1332 states. [2021-05-21 21:17:21,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1332 to 881. [2021-05-21 21:17:21,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 881 states, 880 states have (on average 2.1818181818181817) internal successors, (1920), 880 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:21,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 881 states to 881 states and 1920 transitions. [2021-05-21 21:17:21,730 INFO L78 Accepts]: Start accepts. Automaton has 881 states and 1920 transitions. Word has length 43 [2021-05-21 21:17:21,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:17:21,730 INFO L482 AbstractCegarLoop]: Abstraction has 881 states and 1920 transitions. [2021-05-21 21:17:21,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:21,730 INFO L276 IsEmpty]: Start isEmpty. Operand 881 states and 1920 transitions. [2021-05-21 21:17:21,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-21 21:17:21,731 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:17:21,731 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:17:21,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable337 [2021-05-21 21:17:21,931 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:17:21,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:17:21,932 INFO L82 PathProgramCache]: Analyzing trace with hash -523000667, now seen corresponding path program 151 times [2021-05-21 21:17:21,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:17:21,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628567548] [2021-05-21 21:17:21,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:17:21,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:17:22,213 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:17:22,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:17:22,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628567548] [2021-05-21 21:17:22,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628567548] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:17:22,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856544032] [2021-05-21 21:17:22,214 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:17:22,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:17:22,257 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-21 21:17:22,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:17:22,747 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:17:22,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856544032] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:17:22,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:17:22,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-05-21 21:17:22,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439631175] [2021-05-21 21:17:22,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-21 21:17:22,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:17:22,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-21 21:17:22,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1589, Unknown=0, NotChecked=0, Total=1806 [2021-05-21 21:17:22,748 INFO L87 Difference]: Start difference. First operand 881 states and 1920 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:25,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:17:25,546 INFO L93 Difference]: Finished difference Result 1312 states and 2692 transitions. [2021-05-21 21:17:25,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-05-21 21:17:25,546 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-05-21 21:17:25,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:17:25,547 INFO L225 Difference]: With dead ends: 1312 [2021-05-21 21:17:25,547 INFO L226 Difference]: Without dead ends: 1268 [2021-05-21 21:17:25,548 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4670 ImplicationChecksByTransitivity, 2662.8ms TimeCoverageRelationStatistics Valid=1619, Invalid=13143, Unknown=0, NotChecked=0, Total=14762 [2021-05-21 21:17:25,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1268 states. [2021-05-21 21:17:25,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1268 to 885. [2021-05-21 21:17:25,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 884 states have (on average 2.180995475113122) internal successors, (1928), 884 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:25,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 1928 transitions. [2021-05-21 21:17:25,556 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 1928 transitions. Word has length 43 [2021-05-21 21:17:25,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:17:25,556 INFO L482 AbstractCegarLoop]: Abstraction has 885 states and 1928 transitions. [2021-05-21 21:17:25,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:25,556 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 1928 transitions. [2021-05-21 21:17:25,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-21 21:17:25,557 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:17:25,557 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:17:25,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable343 [2021-05-21 21:17:25,757 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:17:25,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:17:25,757 INFO L82 PathProgramCache]: Analyzing trace with hash 573042153, now seen corresponding path program 152 times [2021-05-21 21:17:25,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:17:25,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966451632] [2021-05-21 21:17:25,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:17:25,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:17:26,043 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:17:26,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:17:26,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966451632] [2021-05-21 21:17:26,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966451632] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:17:26,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876063764] [2021-05-21 21:17:26,043 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:17:26,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:17:26,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:17:26,069 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-21 21:17:26,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:17:26,552 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:17:26,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876063764] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:17:26,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:17:26,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-05-21 21:17:26,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210346880] [2021-05-21 21:17:26,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-21 21:17:26,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:17:26,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-21 21:17:26,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1581, Unknown=0, NotChecked=0, Total=1806 [2021-05-21 21:17:26,553 INFO L87 Difference]: Start difference. First operand 885 states and 1928 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:29,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:17:29,546 INFO L93 Difference]: Finished difference Result 1325 states and 2728 transitions. [2021-05-21 21:17:29,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-05-21 21:17:29,546 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-05-21 21:17:29,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:17:29,547 INFO L225 Difference]: With dead ends: 1325 [2021-05-21 21:17:29,547 INFO L226 Difference]: Without dead ends: 1287 [2021-05-21 21:17:29,547 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5105 ImplicationChecksByTransitivity, 2778.2ms TimeCoverageRelationStatistics Valid=1818, Invalid=14184, Unknown=0, NotChecked=0, Total=16002 [2021-05-21 21:17:29,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1287 states. [2021-05-21 21:17:29,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1287 to 891. [2021-05-21 21:17:29,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 890 states have (on average 2.1842696629213485) internal successors, (1944), 890 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:29,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 1944 transitions. [2021-05-21 21:17:29,555 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 1944 transitions. Word has length 43 [2021-05-21 21:17:29,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:17:29,555 INFO L482 AbstractCegarLoop]: Abstraction has 891 states and 1944 transitions. [2021-05-21 21:17:29,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:29,556 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 1944 transitions. [2021-05-21 21:17:29,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-21 21:17:29,556 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:17:29,556 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:17:29,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2021-05-21 21:17:29,772 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:17:29,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:17:29,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1405466669, now seen corresponding path program 153 times [2021-05-21 21:17:29,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:17:29,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977300280] [2021-05-21 21:17:29,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:17:29,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:17:30,121 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:17:30,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:17:30,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977300280] [2021-05-21 21:17:30,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977300280] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:17:30,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194634202] [2021-05-21 21:17:30,122 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:17:30,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-05-21 21:17:30,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:17:30,151 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-21 21:17:30,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:17:30,637 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:17:30,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194634202] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:17:30,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:17:30,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-05-21 21:17:30,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325995542] [2021-05-21 21:17:30,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-21 21:17:30,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:17:30,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-21 21:17:30,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=1566, Unknown=0, NotChecked=0, Total=1806 [2021-05-21 21:17:30,638 INFO L87 Difference]: Start difference. First operand 891 states and 1944 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:33,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:17:33,905 INFO L93 Difference]: Finished difference Result 1435 states and 2932 transitions. [2021-05-21 21:17:33,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-05-21 21:17:33,905 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-05-21 21:17:33,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:17:33,906 INFO L225 Difference]: With dead ends: 1435 [2021-05-21 21:17:33,906 INFO L226 Difference]: Without dead ends: 1390 [2021-05-21 21:17:33,907 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5395 ImplicationChecksByTransitivity, 3155.5ms TimeCoverageRelationStatistics Valid=2017, Invalid=15013, Unknown=0, NotChecked=0, Total=17030 [2021-05-21 21:17:33,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1390 states. [2021-05-21 21:17:33,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1390 to 895. [2021-05-21 21:17:33,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 894 states have (on average 2.1868008948545863) internal successors, (1955), 894 states have internal predecessors, (1955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:33,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 1955 transitions. [2021-05-21 21:17:33,916 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 1955 transitions. Word has length 43 [2021-05-21 21:17:33,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:17:33,916 INFO L482 AbstractCegarLoop]: Abstraction has 895 states and 1955 transitions. [2021-05-21 21:17:33,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:33,916 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 1955 transitions. [2021-05-21 21:17:33,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-21 21:17:33,916 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:17:33,917 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:17:34,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2021-05-21 21:17:34,117 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:17:34,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:17:34,117 INFO L82 PathProgramCache]: Analyzing trace with hash 140538809, now seen corresponding path program 154 times [2021-05-21 21:17:34,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:17:34,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305176120] [2021-05-21 21:17:34,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:17:34,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:17:34,433 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:17:34,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:17:34,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305176120] [2021-05-21 21:17:34,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305176120] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:17:34,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267275293] [2021-05-21 21:17:34,434 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:17:34,462 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:17:34,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:17:34,463 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-21 21:17:34,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:17:34,961 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:17:34,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267275293] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:17:34,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:17:34,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-05-21 21:17:34,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210183909] [2021-05-21 21:17:34,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-21 21:17:34,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:17:34,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-21 21:17:34,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=1564, Unknown=0, NotChecked=0, Total=1806 [2021-05-21 21:17:34,962 INFO L87 Difference]: Start difference. First operand 895 states and 1955 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:38,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:17:38,010 INFO L93 Difference]: Finished difference Result 1303 states and 2684 transitions. [2021-05-21 21:17:38,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-05-21 21:17:38,010 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-05-21 21:17:38,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:17:38,011 INFO L225 Difference]: With dead ends: 1303 [2021-05-21 21:17:38,011 INFO L226 Difference]: Without dead ends: 1276 [2021-05-21 21:17:38,012 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4606 ImplicationChecksByTransitivity, 2951.2ms TimeCoverageRelationStatistics Valid=1928, Invalid=12834, Unknown=0, NotChecked=0, Total=14762 [2021-05-21 21:17:38,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2021-05-21 21:17:38,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 643. [2021-05-21 21:17:38,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 642 states have (on average 2.115264797507788) internal successors, (1358), 642 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) [2021-05-21 21:17:38,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 1358 transitions. [2021-05-21 21:17:38,018 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 1358 transitions. Word has length 43 [2021-05-21 21:17:38,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:17:38,019 INFO L482 AbstractCegarLoop]: Abstraction has 643 states and 1358 transitions. [2021-05-21 21:17:38,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:38,019 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 1358 transitions. [2021-05-21 21:17:38,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-21 21:17:38,019 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:17:38,019 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:17:38,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable346 [2021-05-21 21:17:38,220 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:17:38,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:17:38,220 INFO L82 PathProgramCache]: Analyzing trace with hash -544326747, now seen corresponding path program 155 times [2021-05-21 21:17:38,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:17:38,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980923808] [2021-05-21 21:17:38,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:17:38,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:17:38,504 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:17:38,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:17:38,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980923808] [2021-05-21 21:17:38,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980923808] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:17:38,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271473541] [2021-05-21 21:17:38,504 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:17:38,531 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-21 21:17:38,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:17:38,532 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-21 21:17:38,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:17:39,013 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:17:39,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271473541] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:17:39,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:17:39,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-05-21 21:17:39,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701636268] [2021-05-21 21:17:39,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-21 21:17:39,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:17:39,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-21 21:17:39,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=1579, Unknown=0, NotChecked=0, Total=1806 [2021-05-21 21:17:39,014 INFO L87 Difference]: Start difference. First operand 643 states and 1358 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:42,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:17:42,095 INFO L93 Difference]: Finished difference Result 1011 states and 2000 transitions. [2021-05-21 21:17:42,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-05-21 21:17:42,095 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-05-21 21:17:42,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:17:42,096 INFO L225 Difference]: With dead ends: 1011 [2021-05-21 21:17:42,096 INFO L226 Difference]: Without dead ends: 973 [2021-05-21 21:17:42,096 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5240 ImplicationChecksByTransitivity, 2803.9ms TimeCoverageRelationStatistics Valid=1787, Invalid=14469, Unknown=0, NotChecked=0, Total=16256 [2021-05-21 21:17:42,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2021-05-21 21:17:42,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 647. [2021-05-21 21:17:42,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 646 states have (on average 2.1145510835913313) internal successors, (1366), 646 states have internal predecessors, (1366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:42,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 1366 transitions. [2021-05-21 21:17:42,102 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 1366 transitions. Word has length 43 [2021-05-21 21:17:42,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:17:42,102 INFO L482 AbstractCegarLoop]: Abstraction has 647 states and 1366 transitions. [2021-05-21 21:17:42,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:42,102 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 1366 transitions. [2021-05-21 21:17:42,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-21 21:17:42,102 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:17:42,102 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:17:42,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable347,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:17:42,303 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:17:42,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:17:42,303 INFO L82 PathProgramCache]: Analyzing trace with hash 288097769, now seen corresponding path program 156 times [2021-05-21 21:17:42,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:17:42,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72990221] [2021-05-21 21:17:42,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:17:42,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:17:42,611 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:17:42,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:17:42,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72990221] [2021-05-21 21:17:42,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72990221] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:17:42,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572087447] [2021-05-21 21:17:42,612 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:17:42,639 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-05-21 21:17:42,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:17:42,640 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-21 21:17:42,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:17:43,130 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:17:43,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572087447] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:17:43,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:17:43,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-05-21 21:17:43,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804121912] [2021-05-21 21:17:43,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-21 21:17:43,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:17:43,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-21 21:17:43,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=1564, Unknown=0, NotChecked=0, Total=1806 [2021-05-21 21:17:43,131 INFO L87 Difference]: Start difference. First operand 647 states and 1366 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:46,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:17:46,395 INFO L93 Difference]: Finished difference Result 1112 states and 2182 transitions. [2021-05-21 21:17:46,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-05-21 21:17:46,396 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-05-21 21:17:46,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:17:46,397 INFO L225 Difference]: With dead ends: 1112 [2021-05-21 21:17:46,397 INFO L226 Difference]: Without dead ends: 1067 [2021-05-21 21:17:46,397 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5556 ImplicationChecksByTransitivity, 3093.3ms TimeCoverageRelationStatistics Valid=2004, Invalid=15288, Unknown=0, NotChecked=0, Total=17292 [2021-05-21 21:17:46,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2021-05-21 21:17:46,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 649. [2021-05-21 21:17:46,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 648 states have (on average 2.115740740740741) internal successors, (1371), 648 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:46,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 1371 transitions. [2021-05-21 21:17:46,403 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 1371 transitions. Word has length 43 [2021-05-21 21:17:46,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:17:46,403 INFO L482 AbstractCegarLoop]: Abstraction has 649 states and 1371 transitions. [2021-05-21 21:17:46,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:46,403 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 1371 transitions. [2021-05-21 21:17:46,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-21 21:17:46,404 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:17:46,404 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:17:46,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable348 [2021-05-21 21:17:46,604 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:17:46,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:17:46,604 INFO L82 PathProgramCache]: Analyzing trace with hash -976830091, now seen corresponding path program 157 times [2021-05-21 21:17:46,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:17:46,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660150867] [2021-05-21 21:17:46,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:17:46,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:17:46,923 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:17:46,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:17:46,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660150867] [2021-05-21 21:17:46,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660150867] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:17:46,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512232882] [2021-05-21 21:17:46,923 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:17:46,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:17:46,948 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-21 21:17:46,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:17:47,436 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:17:47,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512232882] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:17:47,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:17:47,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-05-21 21:17:47,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957498146] [2021-05-21 21:17:47,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-21 21:17:47,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:17:47,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-21 21:17:47,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=1562, Unknown=0, NotChecked=0, Total=1806 [2021-05-21 21:17:47,437 INFO L87 Difference]: Start difference. First operand 649 states and 1371 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:50,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:17:50,337 INFO L93 Difference]: Finished difference Result 1006 states and 2001 transitions. [2021-05-21 21:17:50,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-05-21 21:17:50,337 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-05-21 21:17:50,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:17:50,338 INFO L225 Difference]: With dead ends: 1006 [2021-05-21 21:17:50,338 INFO L226 Difference]: Without dead ends: 986 [2021-05-21 21:17:50,338 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4654 ImplicationChecksByTransitivity, 2912.5ms TimeCoverageRelationStatistics Valid=1906, Invalid=12856, Unknown=0, NotChecked=0, Total=14762 [2021-05-21 21:17:50,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2021-05-21 21:17:50,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 637. [2021-05-21 21:17:50,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 636 states have (on average 2.1037735849056602) internal successors, (1338), 636 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:50,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 1338 transitions. [2021-05-21 21:17:50,344 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 1338 transitions. Word has length 43 [2021-05-21 21:17:50,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:17:50,344 INFO L482 AbstractCegarLoop]: Abstraction has 637 states and 1338 transitions. [2021-05-21 21:17:50,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:50,344 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 1338 transitions. [2021-05-21 21:17:50,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-21 21:17:50,344 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:17:50,344 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:17:50,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable349 [2021-05-21 21:17:50,545 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:17:50,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:17:50,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1442671963, now seen corresponding path program 158 times [2021-05-21 21:17:50,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:17:50,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806203800] [2021-05-21 21:17:50,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:17:50,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:17:50,791 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:17:50,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:17:50,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806203800] [2021-05-21 21:17:50,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806203800] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:17:50,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998159830] [2021-05-21 21:17:50,791 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:17:50,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:17:50,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:17:50,817 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-21 21:17:50,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:17:51,291 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:17:51,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998159830] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:17:51,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:17:51,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-05-21 21:17:51,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431465459] [2021-05-21 21:17:51,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-21 21:17:51,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:17:51,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-21 21:17:51,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=1555, Unknown=0, NotChecked=0, Total=1806 [2021-05-21 21:17:51,292 INFO L87 Difference]: Start difference. First operand 637 states and 1338 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:55,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:17:55,215 INFO L93 Difference]: Finished difference Result 1161 states and 2336 transitions. [2021-05-21 21:17:55,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-05-21 21:17:55,216 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-05-21 21:17:55,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:17:55,217 INFO L225 Difference]: With dead ends: 1161 [2021-05-21 21:17:55,217 INFO L226 Difference]: Without dead ends: 1117 [2021-05-21 21:17:55,218 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6808 ImplicationChecksByTransitivity, 3553.4ms TimeCoverageRelationStatistics Valid=2323, Invalid=17699, Unknown=0, NotChecked=0, Total=20022 [2021-05-21 21:17:55,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2021-05-21 21:17:55,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 653. [2021-05-21 21:17:55,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 652 states have (on average 2.105828220858896) internal successors, (1373), 652 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:55,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 1373 transitions. [2021-05-21 21:17:55,224 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 1373 transitions. Word has length 43 [2021-05-21 21:17:55,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:17:55,224 INFO L482 AbstractCegarLoop]: Abstraction has 653 states and 1373 transitions. [2021-05-21 21:17:55,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:55,224 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 1373 transitions. [2021-05-21 21:17:55,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-21 21:17:55,224 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:17:55,224 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:17:55,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:17:55,425 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:17:55,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:17:55,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1587367473, now seen corresponding path program 159 times [2021-05-21 21:17:55,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:17:55,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699749122] [2021-05-21 21:17:55,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:17:55,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:17:55,695 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:17:55,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:17:55,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699749122] [2021-05-21 21:17:55,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699749122] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:17:55,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269506702] [2021-05-21 21:17:55,696 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 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:17:55,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-05-21 21:17:55,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:17:55,727 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 63 conjunts are in the unsatisfiable core [2021-05-21 21:17:55,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:17:56,220 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:17:56,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269506702] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:17:56,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:17:56,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-05-21 21:17:56,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259079358] [2021-05-21 21:17:56,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-21 21:17:56,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:17:56,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-21 21:17:56,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=1556, Unknown=0, NotChecked=0, Total=1806 [2021-05-21 21:17:56,221 INFO L87 Difference]: Start difference. First operand 653 states and 1373 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:58,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:17:58,949 INFO L93 Difference]: Finished difference Result 1143 states and 2277 transitions. [2021-05-21 21:17:58,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-05-21 21:17:58,949 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-05-21 21:17:58,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:17:58,950 INFO L225 Difference]: With dead ends: 1143 [2021-05-21 21:17:58,950 INFO L226 Difference]: Without dead ends: 1077 [2021-05-21 21:17:58,951 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4300 ImplicationChecksByTransitivity, 2711.8ms TimeCoverageRelationStatistics Valid=1808, Invalid=11998, Unknown=0, NotChecked=0, Total=13806 [2021-05-21 21:17:58,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1077 states. [2021-05-21 21:17:58,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1077 to 444. [2021-05-21 21:17:58,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 2.0654627539503387) internal successors, (915), 443 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:58,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 915 transitions. [2021-05-21 21:17:58,956 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 915 transitions. Word has length 43 [2021-05-21 21:17:58,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:17:58,956 INFO L482 AbstractCegarLoop]: Abstraction has 444 states and 915 transitions. [2021-05-21 21:17:58,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:17:58,956 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 915 transitions. [2021-05-21 21:17:58,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-21 21:17:58,956 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:17:58,956 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:17:59,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:17:59,157 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:17:59,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:17:59,157 INFO L82 PathProgramCache]: Analyzing trace with hash -976438983, now seen corresponding path program 160 times [2021-05-21 21:17:59,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:17:59,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430404352] [2021-05-21 21:17:59,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:17:59,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:17:59,467 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:17:59,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:17:59,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430404352] [2021-05-21 21:17:59,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430404352] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:17:59,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899426648] [2021-05-21 21:17:59,468 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:17:59,492 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:17:59,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:17:59,493 WARN L261 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-21 21:17:59,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:18:00,068 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:18:00,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899426648] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:18:00,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:18:00,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 36 [2021-05-21 21:18:00,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899423632] [2021-05-21 21:18:00,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-21 21:18:00,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:18:00,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-21 21:18:00,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1210, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 21:18:00,069 INFO L87 Difference]: Start difference. First operand 444 states and 915 transitions. Second operand has 37 states, 37 states have (on average 1.945945945945946) internal successors, (72), 36 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:05,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:18:05,986 INFO L93 Difference]: Finished difference Result 790 states and 1593 transitions. [2021-05-21 21:18:05,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-05-21 21:18:05,987 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.945945945945946) internal successors, (72), 36 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-05-21 21:18:05,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:18:05,987 INFO L225 Difference]: With dead ends: 790 [2021-05-21 21:18:05,987 INFO L226 Difference]: Without dead ends: 764 [2021-05-21 21:18:05,988 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6302 ImplicationChecksByTransitivity, 5208.0ms TimeCoverageRelationStatistics Valid=1380, Invalid=16442, Unknown=0, NotChecked=0, Total=17822 [2021-05-21 21:18:05,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2021-05-21 21:18:05,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 387. [2021-05-21 21:18:05,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 2.0725388601036268) internal successors, (800), 386 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:05,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 800 transitions. [2021-05-21 21:18:05,992 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 800 transitions. Word has length 43 [2021-05-21 21:18:05,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:18:05,992 INFO L482 AbstractCegarLoop]: Abstraction has 387 states and 800 transitions. [2021-05-21 21:18:05,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.945945945945946) internal successors, (72), 36 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:05,992 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 800 transitions. [2021-05-21 21:18:05,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-21 21:18:05,992 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:18:05,992 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:18:06,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable354 [2021-05-21 21:18:06,196 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:18:06,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:18:06,196 INFO L82 PathProgramCache]: Analyzing trace with hash 126220515, now seen corresponding path program 161 times [2021-05-21 21:18:06,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:18:06,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193862893] [2021-05-21 21:18:06,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:18:06,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:18:06,264 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-21 21:18:06,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:18:06,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193862893] [2021-05-21 21:18:06,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193862893] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:18:06,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826158567] [2021-05-21 21:18:06,264 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:18:06,291 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-21 21:18:06,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:18:06,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-21 21:18:06,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:18:06,356 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-21 21:18:06,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826158567] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:18:06,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:18:06,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-05-21 21:18:06,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571173935] [2021-05-21 21:18:06,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:18:06,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:18:06,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:18:06,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:18:06,357 INFO L87 Difference]: Start difference. First operand 387 states and 800 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:06,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:18:06,508 INFO L93 Difference]: Finished difference Result 657 states and 1304 transitions. [2021-05-21 21:18:06,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 21:18:06,508 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-05-21 21:18:06,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:18:06,509 INFO L225 Difference]: With dead ends: 657 [2021-05-21 21:18:06,509 INFO L226 Difference]: Without dead ends: 591 [2021-05-21 21:18:06,509 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 107.4ms TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-05-21 21:18:06,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-05-21 21:18:06,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 418. [2021-05-21 21:18:06,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 2.0839328537170263) internal successors, (869), 417 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:06,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 869 transitions. [2021-05-21 21:18:06,512 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 869 transitions. Word has length 45 [2021-05-21 21:18:06,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:18:06,512 INFO L482 AbstractCegarLoop]: Abstraction has 418 states and 869 transitions. [2021-05-21 21:18:06,513 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:06,513 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 869 transitions. [2021-05-21 21:18:06,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-21 21:18:06,513 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:18:06,513 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:18:06,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable355 [2021-05-21 21:18:06,720 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:18:06,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:18:06,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1358919197, now seen corresponding path program 162 times [2021-05-21 21:18:06,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:18:06,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101329980] [2021-05-21 21:18:06,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:18:06,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:18:07,181 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:18:07,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:18:07,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101329980] [2021-05-21 21:18:07,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101329980] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:18:07,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941895006] [2021-05-21 21:18:07,182 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:18:07,209 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-05-21 21:18:07,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:18:07,210 WARN L261 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 66 conjunts are in the unsatisfiable core [2021-05-21 21:18:07,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:18:07,887 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:18:07,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941895006] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:18:07,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:18:07,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 42 [2021-05-21 21:18:07,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588975305] [2021-05-21 21:18:07,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-21 21:18:07,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:18:07,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-21 21:18:07,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1684, Unknown=0, NotChecked=0, Total=1806 [2021-05-21 21:18:07,887 INFO L87 Difference]: Start difference. First operand 418 states and 869 transitions. Second operand has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 42 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:09,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:18:09,472 INFO L93 Difference]: Finished difference Result 559 states and 1149 transitions. [2021-05-21 21:18:09,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-21 21:18:09,473 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 42 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-05-21 21:18:09,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:18:09,473 INFO L225 Difference]: With dead ends: 559 [2021-05-21 21:18:09,473 INFO L226 Difference]: Without dead ends: 543 [2021-05-21 21:18:09,474 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 1439.8ms TimeCoverageRelationStatistics Valid=223, Invalid=3317, Unknown=0, NotChecked=0, Total=3540 [2021-05-21 21:18:09,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-05-21 21:18:09,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 435. [2021-05-21 21:18:09,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 2.0806451612903225) internal successors, (903), 434 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:09,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 903 transitions. [2021-05-21 21:18:09,477 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 903 transitions. Word has length 45 [2021-05-21 21:18:09,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:18:09,477 INFO L482 AbstractCegarLoop]: Abstraction has 435 states and 903 transitions. [2021-05-21 21:18:09,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 42 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:09,477 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 903 transitions. [2021-05-21 21:18:09,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-21 21:18:09,478 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:18:09,478 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:18:09,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable356 [2021-05-21 21:18:09,678 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:18:09,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:18:09,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1371110303, now seen corresponding path program 163 times [2021-05-21 21:18:09,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:18:09,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522043240] [2021-05-21 21:18:09,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:18:09,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:18:09,966 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:18:09,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:18:09,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522043240] [2021-05-21 21:18:09,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522043240] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:18:09,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14940662] [2021-05-21 21:18:09,966 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:18:09,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:18:09,993 WARN L261 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 66 conjunts are in the unsatisfiable core [2021-05-21 21:18:09,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:18:10,653 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:18:10,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14940662] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:18:10,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:18:10,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23] total 42 [2021-05-21 21:18:10,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769714726] [2021-05-21 21:18:10,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-21 21:18:10,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:18:10,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-21 21:18:10,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1659, Unknown=0, NotChecked=0, Total=1806 [2021-05-21 21:18:10,654 INFO L87 Difference]: Start difference. First operand 435 states and 903 transitions. Second operand has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:12,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:18:12,996 INFO L93 Difference]: Finished difference Result 726 states and 1438 transitions. [2021-05-21 21:18:12,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-05-21 21:18:12,996 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-05-21 21:18:12,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:18:12,997 INFO L225 Difference]: With dead ends: 726 [2021-05-21 21:18:12,997 INFO L226 Difference]: Without dead ends: 655 [2021-05-21 21:18:12,997 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3246 ImplicationChecksByTransitivity, 2249.1ms TimeCoverageRelationStatistics Valid=626, Invalid=9676, Unknown=0, NotChecked=0, Total=10302 [2021-05-21 21:18:12,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2021-05-21 21:18:13,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 347. [2021-05-21 21:18:13,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 2.0751445086705202) internal successors, (718), 346 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:13,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 718 transitions. [2021-05-21 21:18:13,001 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 718 transitions. Word has length 45 [2021-05-21 21:18:13,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:18:13,001 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 718 transitions. [2021-05-21 21:18:13,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:13,001 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 718 transitions. [2021-05-21 21:18:13,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-21 21:18:13,001 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:18:13,001 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:18:13,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable362 [2021-05-21 21:18:13,217 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:18:13,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:18:13,217 INFO L82 PathProgramCache]: Analyzing trace with hash 705869159, now seen corresponding path program 164 times [2021-05-21 21:18:13,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:18:13,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458998685] [2021-05-21 21:18:13,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:18:13,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:18:13,673 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:18:13,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:18:13,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458998685] [2021-05-21 21:18:13,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458998685] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:18:13,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181638274] [2021-05-21 21:18:13,674 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:18:13,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:18:13,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:18:13,701 WARN L261 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 66 conjunts are in the unsatisfiable core [2021-05-21 21:18:13,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:18:14,400 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:18:14,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181638274] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:18:14,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:18:14,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 43 [2021-05-21 21:18:14,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387251891] [2021-05-21 21:18:14,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-05-21 21:18:14,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:18:14,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-05-21 21:18:14,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1752, Unknown=0, NotChecked=0, Total=1892 [2021-05-21 21:18:14,401 INFO L87 Difference]: Start difference. First operand 347 states and 718 transitions. Second operand has 44 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:15,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:18:15,531 INFO L93 Difference]: Finished difference Result 477 states and 976 transitions. [2021-05-21 21:18:15,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-21 21:18:15,531 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-05-21 21:18:15,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:18:15,532 INFO L225 Difference]: With dead ends: 477 [2021-05-21 21:18:15,532 INFO L226 Difference]: Without dead ends: 461 [2021-05-21 21:18:15,532 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 1392.1ms TimeCoverageRelationStatistics Valid=223, Invalid=3199, Unknown=0, NotChecked=0, Total=3422 [2021-05-21 21:18:15,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-05-21 21:18:15,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 347. [2021-05-21 21:18:15,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 2.0751445086705202) internal successors, (718), 346 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:15,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 718 transitions. [2021-05-21 21:18:15,535 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 718 transitions. Word has length 45 [2021-05-21 21:18:15,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:18:15,535 INFO L482 AbstractCegarLoop]: Abstraction has 347 states and 718 transitions. [2021-05-21 21:18:15,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:15,535 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 718 transitions. [2021-05-21 21:18:15,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-21 21:18:15,535 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:18:15,535 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:18:15,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2021-05-21 21:18:15,736 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:18:15,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:18:15,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1550510357, now seen corresponding path program 165 times [2021-05-21 21:18:15,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:18:15,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228720316] [2021-05-21 21:18:15,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:18:15,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:18:16,185 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:18:16,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:18:16,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228720316] [2021-05-21 21:18:16,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228720316] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:18:16,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117887638] [2021-05-21 21:18:16,185 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:18:16,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-05-21 21:18:16,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:18:16,214 WARN L261 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 66 conjunts are in the unsatisfiable core [2021-05-21 21:18:16,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:18:16,916 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:18:16,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117887638] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:18:16,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:18:16,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 42 [2021-05-21 21:18:16,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259934660] [2021-05-21 21:18:16,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-21 21:18:16,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:18:16,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-21 21:18:16,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1684, Unknown=0, NotChecked=0, Total=1806 [2021-05-21 21:18:16,917 INFO L87 Difference]: Start difference. First operand 347 states and 718 transitions. Second operand has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 42 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:18,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:18:18,410 INFO L93 Difference]: Finished difference Result 491 states and 1004 transitions. [2021-05-21 21:18:18,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-21 21:18:18,410 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 42 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-05-21 21:18:18,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:18:18,411 INFO L225 Difference]: With dead ends: 491 [2021-05-21 21:18:18,411 INFO L226 Difference]: Without dead ends: 475 [2021-05-21 21:18:18,411 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 1428.4ms TimeCoverageRelationStatistics Valid=223, Invalid=3317, Unknown=0, NotChecked=0, Total=3540 [2021-05-21 21:18:18,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-05-21 21:18:18,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 355. [2021-05-21 21:18:18,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 2.073446327683616) internal successors, (734), 354 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:18,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 734 transitions. [2021-05-21 21:18:18,414 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 734 transitions. Word has length 45 [2021-05-21 21:18:18,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:18:18,414 INFO L482 AbstractCegarLoop]: Abstraction has 355 states and 734 transitions. [2021-05-21 21:18:18,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 42 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:18,414 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 734 transitions. [2021-05-21 21:18:18,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-21 21:18:18,414 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:18:18,414 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:18:18,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:18:18,615 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:18:18,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:18:18,615 INFO L82 PathProgramCache]: Analyzing trace with hash -972740753, now seen corresponding path program 166 times [2021-05-21 21:18:18,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:18:18,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308034530] [2021-05-21 21:18:18,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:18:18,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:18:18,916 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 21:18:18,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:18:18,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308034530] [2021-05-21 21:18:18,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308034530] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:18:18,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562974932] [2021-05-21 21:18:18,916 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:18:18,941 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:18:18,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:18:18,942 WARN L261 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 66 conjunts are in the unsatisfiable core [2021-05-21 21:18:18,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:18:19,536 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:18:19,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562974932] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:18:19,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:18:19,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23] total 42 [2021-05-21 21:18:19,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737968429] [2021-05-21 21:18:19,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-21 21:18:19,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:18:19,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-21 21:18:19,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1658, Unknown=0, NotChecked=0, Total=1806 [2021-05-21 21:18:19,537 INFO L87 Difference]: Start difference. First operand 355 states and 734 transitions. Second operand has 43 states, 43 states have (on average 2.0) internal successors, (86), 42 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:22,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:18:22,163 INFO L93 Difference]: Finished difference Result 605 states and 1216 transitions. [2021-05-21 21:18:22,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-05-21 21:18:22,164 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0) internal successors, (86), 42 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-05-21 21:18:22,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:18:22,164 INFO L225 Difference]: With dead ends: 605 [2021-05-21 21:18:22,164 INFO L226 Difference]: Without dead ends: 573 [2021-05-21 21:18:22,165 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3233 ImplicationChecksByTransitivity, 2206.9ms TimeCoverageRelationStatistics Valid=647, Invalid=9655, Unknown=0, NotChecked=0, Total=10302 [2021-05-21 21:18:22,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-05-21 21:18:22,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 384. [2021-05-21 21:18:22,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 2.0704960835509136) internal successors, (793), 383 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:22,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 793 transitions. [2021-05-21 21:18:22,168 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 793 transitions. Word has length 45 [2021-05-21 21:18:22,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:18:22,168 INFO L482 AbstractCegarLoop]: Abstraction has 384 states and 793 transitions. [2021-05-21 21:18:22,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.0) internal successors, (86), 42 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:22,168 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 793 transitions. [2021-05-21 21:18:22,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 21:18:22,168 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:18:22,168 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:18:22,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2021-05-21 21:18:22,369 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:18:22,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:18:22,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1749615503, now seen corresponding path program 167 times [2021-05-21 21:18:22,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:18:22,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615108438] [2021-05-21 21:18:22,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:18:22,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:18:22,690 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:18:22,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:18:22,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615108438] [2021-05-21 21:18:22,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615108438] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:18:22,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858139962] [2021-05-21 21:18:22,690 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:18:22,719 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-05-21 21:18:22,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:18:22,720 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-05-21 21:18:22,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:18:23,289 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:18:23,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858139962] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:18:23,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:18:23,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-05-21 21:18:23,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557487116] [2021-05-21 21:18:23,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-21 21:18:23,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:18:23,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-21 21:18:23,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1916, Unknown=0, NotChecked=0, Total=2162 [2021-05-21 21:18:23,290 INFO L87 Difference]: Start difference. First operand 384 states and 793 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:26,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:18:26,057 INFO L93 Difference]: Finished difference Result 934 states and 1837 transitions. [2021-05-21 21:18:26,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-05-21 21:18:26,058 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-21 21:18:26,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:18:26,059 INFO L225 Difference]: With dead ends: 934 [2021-05-21 21:18:26,059 INFO L226 Difference]: Without dead ends: 855 [2021-05-21 21:18:26,059 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3856 ImplicationChecksByTransitivity, 2655.3ms TimeCoverageRelationStatistics Valid=1642, Invalid=11468, Unknown=0, NotChecked=0, Total=13110 [2021-05-21 21:18:26,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2021-05-21 21:18:26,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 477. [2021-05-21 21:18:26,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 2.1512605042016806) internal successors, (1024), 476 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:26,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1024 transitions. [2021-05-21 21:18:26,064 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1024 transitions. Word has length 47 [2021-05-21 21:18:26,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:18:26,064 INFO L482 AbstractCegarLoop]: Abstraction has 477 states and 1024 transitions. [2021-05-21 21:18:26,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:26,064 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1024 transitions. [2021-05-21 21:18:26,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 21:18:26,065 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:18:26,065 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:18:26,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:18:26,281 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:18:26,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:18:26,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1264016873, now seen corresponding path program 168 times [2021-05-21 21:18:26,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:18:26,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865126225] [2021-05-21 21:18:26,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:18:26,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:18:26,596 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:18:26,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:18:26,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865126225] [2021-05-21 21:18:26,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865126225] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:18:26,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178444015] [2021-05-21 21:18:26,597 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:18:26,628 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-05-21 21:18:26,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:18:26,630 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 68 conjunts are in the unsatisfiable core [2021-05-21 21:18:26,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:18:27,291 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:18:27,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178444015] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:18:27,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:18:27,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-05-21 21:18:27,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181268437] [2021-05-21 21:18:27,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-21 21:18:27,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:18:27,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-21 21:18:27,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1943, Unknown=0, NotChecked=0, Total=2162 [2021-05-21 21:18:27,292 INFO L87 Difference]: Start difference. First operand 477 states and 1024 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:30,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:18:30,348 INFO L93 Difference]: Finished difference Result 978 states and 1910 transitions. [2021-05-21 21:18:30,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-05-21 21:18:30,348 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-21 21:18:30,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:18:30,349 INFO L225 Difference]: With dead ends: 978 [2021-05-21 21:18:30,349 INFO L226 Difference]: Without dead ends: 910 [2021-05-21 21:18:30,349 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4027 ImplicationChecksByTransitivity, 3072.6ms TimeCoverageRelationStatistics Valid=1709, Invalid=12571, Unknown=0, NotChecked=0, Total=14280 [2021-05-21 21:18:30,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2021-05-21 21:18:30,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 479. [2021-05-21 21:18:30,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 478 states have (on average 2.1506276150627617) internal successors, (1028), 478 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:30,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1028 transitions. [2021-05-21 21:18:30,354 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1028 transitions. Word has length 47 [2021-05-21 21:18:30,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:18:30,354 INFO L482 AbstractCegarLoop]: Abstraction has 479 states and 1028 transitions. [2021-05-21 21:18:30,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:30,355 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1028 transitions. [2021-05-21 21:18:30,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 21:18:30,355 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:18:30,355 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:18:30,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:18:30,571 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:18:30,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:18:30,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1204905819, now seen corresponding path program 169 times [2021-05-21 21:18:30,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:18:30,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17696558] [2021-05-21 21:18:30,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:18:30,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:18:30,886 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:18:30,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:18:30,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17696558] [2021-05-21 21:18:30,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17696558] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:18:30,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138369356] [2021-05-21 21:18:30,886 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:18:30,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:18:30,913 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-05-21 21:18:30,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:18:31,458 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:18:31,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138369356] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:18:31,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:18:31,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-05-21 21:18:31,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018463313] [2021-05-21 21:18:31,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-21 21:18:31,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:18:31,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-21 21:18:31,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1932, Unknown=0, NotChecked=0, Total=2162 [2021-05-21 21:18:31,459 INFO L87 Difference]: Start difference. First operand 479 states and 1028 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:34,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:18:34,499 INFO L93 Difference]: Finished difference Result 976 states and 1908 transitions. [2021-05-21 21:18:34,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-05-21 21:18:34,499 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-21 21:18:34,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:18:34,500 INFO L225 Difference]: With dead ends: 976 [2021-05-21 21:18:34,500 INFO L226 Difference]: Without dead ends: 914 [2021-05-21 21:18:34,501 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4704 ImplicationChecksByTransitivity, 2844.3ms TimeCoverageRelationStatistics Valid=1823, Invalid=13677, Unknown=0, NotChecked=0, Total=15500 [2021-05-21 21:18:34,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 914 states. [2021-05-21 21:18:34,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 914 to 481. [2021-05-21 21:18:34,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 2.15) internal successors, (1032), 480 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:34,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 1032 transitions. [2021-05-21 21:18:34,506 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 1032 transitions. Word has length 47 [2021-05-21 21:18:34,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:18:34,506 INFO L482 AbstractCegarLoop]: Abstraction has 481 states and 1032 transitions. [2021-05-21 21:18:34,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:34,506 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 1032 transitions. [2021-05-21 21:18:34,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 21:18:34,506 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:18:34,506 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:18:34,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:18:34,707 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:18:34,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:18:34,707 INFO L82 PathProgramCache]: Analyzing trace with hash -298668641, now seen corresponding path program 170 times [2021-05-21 21:18:34,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:18:34,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597133853] [2021-05-21 21:18:34,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:18:34,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:18:35,019 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:18:35,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:18:35,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597133853] [2021-05-21 21:18:35,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597133853] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:18:35,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668843491] [2021-05-21 21:18:35,019 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:18:35,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:18:35,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:18:35,046 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-05-21 21:18:35,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:18:35,594 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:18:35,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668843491] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:18:35,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:18:35,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-05-21 21:18:35,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580118539] [2021-05-21 21:18:35,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-21 21:18:35,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:18:35,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-21 21:18:35,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1936, Unknown=0, NotChecked=0, Total=2162 [2021-05-21 21:18:35,595 INFO L87 Difference]: Start difference. First operand 481 states and 1032 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:38,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:18:38,497 INFO L93 Difference]: Finished difference Result 974 states and 1906 transitions. [2021-05-21 21:18:38,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-05-21 21:18:38,497 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-21 21:18:38,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:18:38,498 INFO L225 Difference]: With dead ends: 974 [2021-05-21 21:18:38,498 INFO L226 Difference]: Without dead ends: 918 [2021-05-21 21:18:38,498 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5150 ImplicationChecksByTransitivity, 2898.6ms TimeCoverageRelationStatistics Valid=1940, Invalid=14830, Unknown=0, NotChecked=0, Total=16770 [2021-05-21 21:18:38,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2021-05-21 21:18:38,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 483. [2021-05-21 21:18:38,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 2.1493775933609958) internal successors, (1036), 482 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:38,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 1036 transitions. [2021-05-21 21:18:38,503 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 1036 transitions. Word has length 47 [2021-05-21 21:18:38,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:18:38,503 INFO L482 AbstractCegarLoop]: Abstraction has 483 states and 1036 transitions. [2021-05-21 21:18:38,503 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:38,503 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 1036 transitions. [2021-05-21 21:18:38,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 21:18:38,504 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:18:38,504 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:18:38,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable397 [2021-05-21 21:18:38,704 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:18:38,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:18:38,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1845015779, now seen corresponding path program 171 times [2021-05-21 21:18:38,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:18:38,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516515189] [2021-05-21 21:18:38,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:18:38,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:18:39,029 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:18:39,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:18:39,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516515189] [2021-05-21 21:18:39,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516515189] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:18:39,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602340453] [2021-05-21 21:18:39,030 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:18:39,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-05-21 21:18:39,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:18:39,061 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-05-21 21:18:39,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:18:39,613 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:18:39,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602340453] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:18:39,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:18:39,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-05-21 21:18:39,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250933819] [2021-05-21 21:18:39,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-21 21:18:39,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:18:39,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-21 21:18:39,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1932, Unknown=0, NotChecked=0, Total=2162 [2021-05-21 21:18:39,614 INFO L87 Difference]: Start difference. First operand 483 states and 1036 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:42,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:18:42,927 INFO L93 Difference]: Finished difference Result 972 states and 1904 transitions. [2021-05-21 21:18:42,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-05-21 21:18:42,927 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-21 21:18:42,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:18:42,928 INFO L225 Difference]: With dead ends: 972 [2021-05-21 21:18:42,928 INFO L226 Difference]: Without dead ends: 922 [2021-05-21 21:18:42,929 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5601 ImplicationChecksByTransitivity, 3087.4ms TimeCoverageRelationStatistics Valid=2092, Invalid=15998, Unknown=0, NotChecked=0, Total=18090 [2021-05-21 21:18:42,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 922 states. [2021-05-21 21:18:42,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 922 to 485. [2021-05-21 21:18:42,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 2.1487603305785123) internal successors, (1040), 484 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:42,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 1040 transitions. [2021-05-21 21:18:42,933 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 1040 transitions. Word has length 47 [2021-05-21 21:18:42,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:18:42,933 INFO L482 AbstractCegarLoop]: Abstraction has 485 states and 1040 transitions. [2021-05-21 21:18:42,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:42,934 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 1040 transitions. [2021-05-21 21:18:42,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 21:18:42,934 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:18:42,934 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:18:43,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable398,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:18:43,134 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:18:43,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:18:43,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1419789017, now seen corresponding path program 172 times [2021-05-21 21:18:43,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:18:43,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904392835] [2021-05-21 21:18:43,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:18:43,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:18:43,448 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:18:43,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:18:43,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904392835] [2021-05-21 21:18:43,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904392835] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:18:43,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291089818] [2021-05-21 21:18:43,448 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:18:43,473 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:18:43,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:18:43,474 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-05-21 21:18:43,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:18:44,030 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:18:44,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291089818] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:18:44,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:18:44,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-05-21 21:18:44,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380690933] [2021-05-21 21:18:44,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-21 21:18:44,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:18:44,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-21 21:18:44,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1926, Unknown=0, NotChecked=0, Total=2162 [2021-05-21 21:18:44,031 INFO L87 Difference]: Start difference. First operand 485 states and 1040 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:47,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:18:47,427 INFO L93 Difference]: Finished difference Result 970 states and 1902 transitions. [2021-05-21 21:18:47,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-05-21 21:18:47,428 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-21 21:18:47,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:18:47,428 INFO L225 Difference]: With dead ends: 970 [2021-05-21 21:18:47,428 INFO L226 Difference]: Without dead ends: 926 [2021-05-21 21:18:47,429 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6075 ImplicationChecksByTransitivity, 3210.6ms TimeCoverageRelationStatistics Valid=2264, Invalid=17196, Unknown=0, NotChecked=0, Total=19460 [2021-05-21 21:18:47,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2021-05-21 21:18:47,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 487. [2021-05-21 21:18:47,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 2.1481481481481484) internal successors, (1044), 486 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:47,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 1044 transitions. [2021-05-21 21:18:47,434 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 1044 transitions. Word has length 47 [2021-05-21 21:18:47,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:18:47,434 INFO L482 AbstractCegarLoop]: Abstraction has 487 states and 1044 transitions. [2021-05-21 21:18:47,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:47,434 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 1044 transitions. [2021-05-21 21:18:47,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 21:18:47,434 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:18:47,434 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:18:47,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable399 [2021-05-21 21:18:47,635 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:18:47,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:18:47,635 INFO L82 PathProgramCache]: Analyzing trace with hash -323746197, now seen corresponding path program 173 times [2021-05-21 21:18:47,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:18:47,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716077885] [2021-05-21 21:18:47,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:18:47,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:18:47,950 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:18:47,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:18:47,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716077885] [2021-05-21 21:18:47,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716077885] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:18:47,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520237000] [2021-05-21 21:18:47,951 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:18:47,980 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-05-21 21:18:47,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:18:47,981 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-05-21 21:18:47,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:18:48,521 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:18:48,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520237000] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:18:48,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:18:48,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-05-21 21:18:48,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873019793] [2021-05-21 21:18:48,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-21 21:18:48,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:18:48,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-21 21:18:48,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1916, Unknown=0, NotChecked=0, Total=2162 [2021-05-21 21:18:48,522 INFO L87 Difference]: Start difference. First operand 487 states and 1044 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:52,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:18:52,086 INFO L93 Difference]: Finished difference Result 968 states and 1900 transitions. [2021-05-21 21:18:52,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2021-05-21 21:18:52,086 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-21 21:18:52,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:18:52,087 INFO L225 Difference]: With dead ends: 968 [2021-05-21 21:18:52,087 INFO L226 Difference]: Without dead ends: 930 [2021-05-21 21:18:52,088 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6565 ImplicationChecksByTransitivity, 3344.0ms TimeCoverageRelationStatistics Valid=2461, Invalid=18419, Unknown=0, NotChecked=0, Total=20880 [2021-05-21 21:18:52,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2021-05-21 21:18:52,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 489. [2021-05-21 21:18:52,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 488 states have (on average 2.1475409836065573) internal successors, (1048), 488 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:52,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 1048 transitions. [2021-05-21 21:18:52,093 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 1048 transitions. Word has length 47 [2021-05-21 21:18:52,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:18:52,093 INFO L482 AbstractCegarLoop]: Abstraction has 489 states and 1048 transitions. [2021-05-21 21:18:52,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:52,093 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 1048 transitions. [2021-05-21 21:18:52,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 21:18:52,093 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:18:52,093 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:18:52,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable400 [2021-05-21 21:18:52,294 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:18:52,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:18:52,294 INFO L82 PathProgramCache]: Analyzing trace with hash 508678319, now seen corresponding path program 174 times [2021-05-21 21:18:52,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:18:52,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573096926] [2021-05-21 21:18:52,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:18:52,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:18:52,650 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:18:52,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:18:52,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573096926] [2021-05-21 21:18:52,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573096926] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:18:52,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032214910] [2021-05-21 21:18:52,651 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:18:52,679 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-05-21 21:18:52,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:18:52,680 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-05-21 21:18:52,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:18:53,219 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:18:53,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032214910] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:18:53,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:18:53,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-05-21 21:18:53,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665622328] [2021-05-21 21:18:53,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-21 21:18:53,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:18:53,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-21 21:18:53,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=1899, Unknown=0, NotChecked=0, Total=2162 [2021-05-21 21:18:53,220 INFO L87 Difference]: Start difference. First operand 489 states and 1048 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:57,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:18:57,320 INFO L93 Difference]: Finished difference Result 1037 states and 2023 transitions. [2021-05-21 21:18:57,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-05-21 21:18:57,321 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-21 21:18:57,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:18:57,321 INFO L225 Difference]: With dead ends: 1037 [2021-05-21 21:18:57,321 INFO L226 Difference]: Without dead ends: 992 [2021-05-21 21:18:57,322 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6908 ImplicationChecksByTransitivity, 3724.2ms TimeCoverageRelationStatistics Valid=2661, Invalid=19391, Unknown=0, NotChecked=0, Total=22052 [2021-05-21 21:18:57,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 992 states. [2021-05-21 21:18:57,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 992 to 492. [2021-05-21 21:18:57,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 491 states have (on average 2.15071283095723) internal successors, (1056), 491 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:57,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 1056 transitions. [2021-05-21 21:18:57,327 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 1056 transitions. Word has length 47 [2021-05-21 21:18:57,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:18:57,327 INFO L482 AbstractCegarLoop]: Abstraction has 492 states and 1056 transitions. [2021-05-21 21:18:57,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:18:57,327 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 1056 transitions. [2021-05-21 21:18:57,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 21:18:57,327 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:18:57,328 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:18:57,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable401 [2021-05-21 21:18:57,528 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:18:57,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:18:57,528 INFO L82 PathProgramCache]: Analyzing trace with hash -756249541, now seen corresponding path program 175 times [2021-05-21 21:18:57,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:18:57,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422946404] [2021-05-21 21:18:57,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:18:57,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:18:57,877 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:18:57,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:18:57,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422946404] [2021-05-21 21:18:57,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422946404] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:18:57,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681632309] [2021-05-21 21:18:57,877 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:18:57,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:18:57,904 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-05-21 21:18:57,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:18:58,459 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:18:58,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681632309] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:18:58,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:18:58,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-05-21 21:18:58,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979854650] [2021-05-21 21:18:58,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-21 21:18:58,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:18:58,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-21 21:18:58,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=1897, Unknown=0, NotChecked=0, Total=2162 [2021-05-21 21:18:58,460 INFO L87 Difference]: Start difference. First operand 492 states and 1056 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:01,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:01,981 INFO L93 Difference]: Finished difference Result 887 states and 1742 transitions. [2021-05-21 21:19:01,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-05-21 21:19:01,981 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-21 21:19:01,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:01,982 INFO L225 Difference]: With dead ends: 887 [2021-05-21 21:19:01,982 INFO L226 Difference]: Without dead ends: 867 [2021-05-21 21:19:01,987 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5722 ImplicationChecksByTransitivity, 3369.9ms TimeCoverageRelationStatistics Valid=2444, Invalid=16188, Unknown=0, NotChecked=0, Total=18632 [2021-05-21 21:19:01,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2021-05-21 21:19:01,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 493. [2021-05-21 21:19:01,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 2.1504065040650406) internal successors, (1058), 492 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:01,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 1058 transitions. [2021-05-21 21:19:01,992 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 1058 transitions. Word has length 47 [2021-05-21 21:19:01,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:01,992 INFO L482 AbstractCegarLoop]: Abstraction has 493 states and 1058 transitions. [2021-05-21 21:19:01,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:01,992 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 1058 transitions. [2021-05-21 21:19:01,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 21:19:01,993 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:01,993 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:02,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable402 [2021-05-21 21:19:02,193 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:02,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:02,193 INFO L82 PathProgramCache]: Analyzing trace with hash -110443807, now seen corresponding path program 176 times [2021-05-21 21:19:02,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:02,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165213346] [2021-05-21 21:19:02,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:02,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:02,474 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:02,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:02,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165213346] [2021-05-21 21:19:02,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165213346] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:02,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943374948] [2021-05-21 21:19:02,474 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:02,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:19:02,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:02,500 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-05-21 21:19:02,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:03,046 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:03,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943374948] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:03,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:03,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-05-21 21:19:03,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978392404] [2021-05-21 21:19:03,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-21 21:19:03,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:03,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-21 21:19:03,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1921, Unknown=0, NotChecked=0, Total=2162 [2021-05-21 21:19:03,047 INFO L87 Difference]: Start difference. First operand 493 states and 1058 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:05,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:05,677 INFO L93 Difference]: Finished difference Result 958 states and 1874 transitions. [2021-05-21 21:19:05,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-05-21 21:19:05,677 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-21 21:19:05,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:05,678 INFO L225 Difference]: With dead ends: 958 [2021-05-21 21:19:05,678 INFO L226 Difference]: Without dead ends: 896 [2021-05-21 21:19:05,678 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4343 ImplicationChecksByTransitivity, 2582.3ms TimeCoverageRelationStatistics Valid=1615, Invalid=12665, Unknown=0, NotChecked=0, Total=14280 [2021-05-21 21:19:05,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2021-05-21 21:19:05,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 499. [2021-05-21 21:19:05,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 498 states have (on average 2.1485943775100402) internal successors, (1070), 498 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:05,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 1070 transitions. [2021-05-21 21:19:05,687 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 1070 transitions. Word has length 47 [2021-05-21 21:19:05,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:05,687 INFO L482 AbstractCegarLoop]: Abstraction has 499 states and 1070 transitions. [2021-05-21 21:19:05,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:05,687 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 1070 transitions. [2021-05-21 21:19:05,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 21:19:05,688 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:05,688 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:05,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable403 [2021-05-21 21:19:05,888 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:05,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:05,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1614018267, now seen corresponding path program 177 times [2021-05-21 21:19:05,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:05,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634347258] [2021-05-21 21:19:05,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:05,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:06,175 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:06,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:06,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634347258] [2021-05-21 21:19:06,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634347258] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:06,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660890029] [2021-05-21 21:19:06,176 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:06,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-05-21 21:19:06,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:06,207 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-05-21 21:19:06,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:06,759 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:06,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660890029] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:06,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:06,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-05-21 21:19:06,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404174295] [2021-05-21 21:19:06,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-21 21:19:06,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:06,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-21 21:19:06,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1923, Unknown=0, NotChecked=0, Total=2162 [2021-05-21 21:19:06,760 INFO L87 Difference]: Start difference. First operand 499 states and 1070 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:09,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:09,744 INFO L93 Difference]: Finished difference Result 963 states and 1895 transitions. [2021-05-21 21:19:09,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-05-21 21:19:09,744 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-21 21:19:09,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:09,745 INFO L225 Difference]: With dead ends: 963 [2021-05-21 21:19:09,745 INFO L226 Difference]: Without dead ends: 907 [2021-05-21 21:19:09,746 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4760 ImplicationChecksByTransitivity, 2707.4ms TimeCoverageRelationStatistics Valid=1746, Invalid=13754, Unknown=0, NotChecked=0, Total=15500 [2021-05-21 21:19:09,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2021-05-21 21:19:09,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 505. [2021-05-21 21:19:09,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 2.1547619047619047) internal successors, (1086), 504 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:09,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1086 transitions. [2021-05-21 21:19:09,750 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1086 transitions. Word has length 47 [2021-05-21 21:19:09,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:09,751 INFO L482 AbstractCegarLoop]: Abstraction has 505 states and 1086 transitions. [2021-05-21 21:19:09,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:09,751 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1086 transitions. [2021-05-21 21:19:09,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 21:19:09,751 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:09,751 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:09,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable404 [2021-05-21 21:19:09,951 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:09,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:09,952 INFO L82 PathProgramCache]: Analyzing trace with hash 529666153, now seen corresponding path program 178 times [2021-05-21 21:19:09,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:09,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849801631] [2021-05-21 21:19:09,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:09,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:10,268 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:10,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:10,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849801631] [2021-05-21 21:19:10,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849801631] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:10,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409086205] [2021-05-21 21:19:10,268 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:10,293 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:19:10,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:10,294 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-05-21 21:19:10,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:10,846 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:10,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409086205] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:10,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:10,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-05-21 21:19:10,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101299276] [2021-05-21 21:19:10,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-21 21:19:10,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:10,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-21 21:19:10,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=1919, Unknown=0, NotChecked=0, Total=2162 [2021-05-21 21:19:10,847 INFO L87 Difference]: Start difference. First operand 505 states and 1086 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:13,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:13,889 INFO L93 Difference]: Finished difference Result 971 states and 1921 transitions. [2021-05-21 21:19:13,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-05-21 21:19:13,889 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-21 21:19:13,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:13,890 INFO L225 Difference]: With dead ends: 971 [2021-05-21 21:19:13,890 INFO L226 Difference]: Without dead ends: 921 [2021-05-21 21:19:13,891 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5184 ImplicationChecksByTransitivity, 2899.4ms TimeCoverageRelationStatistics Valid=1898, Invalid=14872, Unknown=0, NotChecked=0, Total=16770 [2021-05-21 21:19:13,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2021-05-21 21:19:13,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 511. [2021-05-21 21:19:13,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 510 states have (on average 2.16078431372549) internal successors, (1102), 510 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:13,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 1102 transitions. [2021-05-21 21:19:13,896 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 1102 transitions. Word has length 47 [2021-05-21 21:19:13,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:13,896 INFO L482 AbstractCegarLoop]: Abstraction has 511 states and 1102 transitions. [2021-05-21 21:19:13,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:13,896 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 1102 transitions. [2021-05-21 21:19:13,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 21:19:13,896 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:13,896 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:14,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable405,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:14,101 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:14,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:14,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1559828653, now seen corresponding path program 179 times [2021-05-21 21:19:14,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:14,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787164163] [2021-05-21 21:19:14,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:14,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:14,419 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:14,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:14,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787164163] [2021-05-21 21:19:14,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787164163] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:14,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140414503] [2021-05-21 21:19:14,420 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:14,447 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-05-21 21:19:14,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:14,448 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-05-21 21:19:14,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:14,996 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:14,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140414503] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:14,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:14,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-05-21 21:19:14,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315396430] [2021-05-21 21:19:14,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-21 21:19:14,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:14,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-21 21:19:14,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=1913, Unknown=0, NotChecked=0, Total=2162 [2021-05-21 21:19:14,997 INFO L87 Difference]: Start difference. First operand 511 states and 1102 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:18,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:18,428 INFO L93 Difference]: Finished difference Result 979 states and 1947 transitions. [2021-05-21 21:19:18,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-05-21 21:19:18,428 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-21 21:19:18,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:18,429 INFO L225 Difference]: With dead ends: 979 [2021-05-21 21:19:18,429 INFO L226 Difference]: Without dead ends: 935 [2021-05-21 21:19:18,429 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5631 ImplicationChecksByTransitivity, 3032.2ms TimeCoverageRelationStatistics Valid=2070, Invalid=16020, Unknown=0, NotChecked=0, Total=18090 [2021-05-21 21:19:18,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2021-05-21 21:19:18,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 517. [2021-05-21 21:19:18,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 516 states have (on average 2.1666666666666665) internal successors, (1118), 516 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:18,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 1118 transitions. [2021-05-21 21:19:18,434 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 1118 transitions. Word has length 47 [2021-05-21 21:19:18,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:18,434 INFO L482 AbstractCegarLoop]: Abstraction has 517 states and 1118 transitions. [2021-05-21 21:19:18,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:18,434 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 1118 transitions. [2021-05-21 21:19:18,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 21:19:18,435 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:18,435 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:18,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable406,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:18,635 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:18,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:18,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1639095823, now seen corresponding path program 180 times [2021-05-21 21:19:18,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:18,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773210611] [2021-05-21 21:19:18,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:18,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:18,948 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:18,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:18,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773210611] [2021-05-21 21:19:18,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773210611] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:18,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390693572] [2021-05-21 21:19:18,948 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:18,976 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-05-21 21:19:18,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:18,978 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-05-21 21:19:18,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:19,527 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:19,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390693572] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:19,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:19,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-05-21 21:19:19,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151193191] [2021-05-21 21:19:19,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-21 21:19:19,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:19,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-21 21:19:19,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1903, Unknown=0, NotChecked=0, Total=2162 [2021-05-21 21:19:19,528 INFO L87 Difference]: Start difference. First operand 517 states and 1118 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:23,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:23,313 INFO L93 Difference]: Finished difference Result 987 states and 1973 transitions. [2021-05-21 21:19:23,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-05-21 21:19:23,314 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-21 21:19:23,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:23,314 INFO L225 Difference]: With dead ends: 987 [2021-05-21 21:19:23,314 INFO L226 Difference]: Without dead ends: 949 [2021-05-21 21:19:23,315 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6092 ImplicationChecksByTransitivity, 3175.4ms TimeCoverageRelationStatistics Valid=2267, Invalid=17193, Unknown=0, NotChecked=0, Total=19460 [2021-05-21 21:19:23,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2021-05-21 21:19:23,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 523. [2021-05-21 21:19:23,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 522 states have (on average 2.1724137931034484) internal successors, (1134), 522 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:23,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 1134 transitions. [2021-05-21 21:19:23,320 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 1134 transitions. Word has length 47 [2021-05-21 21:19:23,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:23,320 INFO L482 AbstractCegarLoop]: Abstraction has 523 states and 1134 transitions. [2021-05-21 21:19:23,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:23,320 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 1134 transitions. [2021-05-21 21:19:23,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 21:19:23,321 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:23,321 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:23,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable407,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:23,521 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:23,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:23,521 INFO L82 PathProgramCache]: Analyzing trace with hash -806671307, now seen corresponding path program 181 times [2021-05-21 21:19:23,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:23,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756846176] [2021-05-21 21:19:23,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:23,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:23,879 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:23,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:23,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756846176] [2021-05-21 21:19:23,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756846176] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:23,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701810428] [2021-05-21 21:19:23,879 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:23,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:23,905 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-05-21 21:19:23,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:24,454 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:24,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701810428] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:24,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:24,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-05-21 21:19:24,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057816927] [2021-05-21 21:19:24,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-21 21:19:24,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:24,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-21 21:19:24,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1886, Unknown=0, NotChecked=0, Total=2162 [2021-05-21 21:19:24,455 INFO L87 Difference]: Start difference. First operand 523 states and 1134 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:28,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:28,222 INFO L93 Difference]: Finished difference Result 1095 states and 2169 transitions. [2021-05-21 21:19:28,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-05-21 21:19:28,222 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-21 21:19:28,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:28,223 INFO L225 Difference]: With dead ends: 1095 [2021-05-21 21:19:28,223 INFO L226 Difference]: Without dead ends: 1050 [2021-05-21 21:19:28,224 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6417 ImplicationChecksByTransitivity, 3536.5ms TimeCoverageRelationStatistics Valid=2470, Invalid=18122, Unknown=0, NotChecked=0, Total=20592 [2021-05-21 21:19:28,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2021-05-21 21:19:28,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 527. [2021-05-21 21:19:28,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 526 states have (on average 2.17680608365019) internal successors, (1145), 526 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:28,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 1145 transitions. [2021-05-21 21:19:28,229 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 1145 transitions. Word has length 47 [2021-05-21 21:19:28,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:28,229 INFO L482 AbstractCegarLoop]: Abstraction has 527 states and 1145 transitions. [2021-05-21 21:19:28,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:28,229 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 1145 transitions. [2021-05-21 21:19:28,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 21:19:28,229 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:28,230 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:28,430 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable408,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:28,430 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:28,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:28,430 INFO L82 PathProgramCache]: Analyzing trace with hash -2071599167, now seen corresponding path program 182 times [2021-05-21 21:19:28,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:28,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498633375] [2021-05-21 21:19:28,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:28,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:28,777 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:28,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:28,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498633375] [2021-05-21 21:19:28,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498633375] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:28,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852857018] [2021-05-21 21:19:28,777 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:28,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:19:28,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:28,809 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-05-21 21:19:28,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:29,360 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:29,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852857018] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:29,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:29,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-05-21 21:19:29,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388580914] [2021-05-21 21:19:29,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-21 21:19:29,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:29,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-21 21:19:29,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=1884, Unknown=0, NotChecked=0, Total=2162 [2021-05-21 21:19:29,360 INFO L87 Difference]: Start difference. First operand 527 states and 1145 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:33,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:33,123 INFO L93 Difference]: Finished difference Result 945 states and 1898 transitions. [2021-05-21 21:19:33,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-05-21 21:19:33,123 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-21 21:19:33,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:33,124 INFO L225 Difference]: With dead ends: 945 [2021-05-21 21:19:33,124 INFO L226 Difference]: Without dead ends: 925 [2021-05-21 21:19:33,124 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5370 ImplicationChecksByTransitivity, 3265.0ms TimeCoverageRelationStatistics Valid=2321, Invalid=15235, Unknown=0, NotChecked=0, Total=17556 [2021-05-21 21:19:33,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2021-05-21 21:19:33,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 505. [2021-05-21 21:19:33,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 2.1626984126984126) internal successors, (1090), 504 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:33,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1090 transitions. [2021-05-21 21:19:33,129 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1090 transitions. Word has length 47 [2021-05-21 21:19:33,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:33,129 INFO L482 AbstractCegarLoop]: Abstraction has 505 states and 1090 transitions. [2021-05-21 21:19:33,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:33,129 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1090 transitions. [2021-05-21 21:19:33,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 21:19:33,130 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:33,130 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:33,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,183 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:33,330 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:33,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:33,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1368922593, now seen corresponding path program 183 times [2021-05-21 21:19:33,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:33,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932913047] [2021-05-21 21:19:33,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:33,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:33,613 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:33,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:33,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932913047] [2021-05-21 21:19:33,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932913047] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:33,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793825828] [2021-05-21 21:19:33,614 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:33,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-05-21 21:19:33,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:33,646 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-05-21 21:19:33,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:34,210 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:34,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793825828] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:34,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:34,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-05-21 21:19:34,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740319281] [2021-05-21 21:19:34,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-21 21:19:34,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:34,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-21 21:19:34,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=1918, Unknown=0, NotChecked=0, Total=2162 [2021-05-21 21:19:34,211 INFO L87 Difference]: Start difference. First operand 505 states and 1090 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:37,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:37,066 INFO L93 Difference]: Finished difference Result 947 states and 1867 transitions. [2021-05-21 21:19:37,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-05-21 21:19:37,066 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-21 21:19:37,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:37,067 INFO L225 Difference]: With dead ends: 947 [2021-05-21 21:19:37,067 INFO L226 Difference]: Without dead ends: 891 [2021-05-21 21:19:37,067 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4884 ImplicationChecksByTransitivity, 2738.1ms TimeCoverageRelationStatistics Valid=1731, Invalid=14019, Unknown=0, NotChecked=0, Total=15750 [2021-05-21 21:19:37,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2021-05-21 21:19:37,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 509. [2021-05-21 21:19:37,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 508 states have (on average 2.161417322834646) internal successors, (1098), 508 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:37,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 1098 transitions. [2021-05-21 21:19:37,072 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 1098 transitions. Word has length 47 [2021-05-21 21:19:37,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:37,072 INFO L482 AbstractCegarLoop]: Abstraction has 509 states and 1098 transitions. [2021-05-21 21:19:37,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:37,072 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 1098 transitions. [2021-05-21 21:19:37,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 21:19:37,073 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:37,073 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:37,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable410 [2021-05-21 21:19:37,274 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:37,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:37,274 INFO L82 PathProgramCache]: Analyzing trace with hash -782360283, now seen corresponding path program 184 times [2021-05-21 21:19:37,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:37,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002307580] [2021-05-21 21:19:37,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:37,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:37,594 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:37,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:37,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002307580] [2021-05-21 21:19:37,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002307580] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:37,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912522495] [2021-05-21 21:19:37,594 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 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:37,619 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:19:37,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:37,620 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-05-21 21:19:37,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:38,176 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:38,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912522495] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:38,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:38,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-05-21 21:19:38,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333465723] [2021-05-21 21:19:38,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-21 21:19:38,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:38,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-21 21:19:38,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=1914, Unknown=0, NotChecked=0, Total=2162 [2021-05-21 21:19:38,177 INFO L87 Difference]: Start difference. First operand 509 states and 1098 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:41,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:41,293 INFO L93 Difference]: Finished difference Result 954 states and 1892 transitions. [2021-05-21 21:19:41,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-05-21 21:19:41,293 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-21 21:19:41,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:41,294 INFO L225 Difference]: With dead ends: 954 [2021-05-21 21:19:41,294 INFO L226 Difference]: Without dead ends: 904 [2021-05-21 21:19:41,295 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5322 ImplicationChecksByTransitivity, 2947.2ms TimeCoverageRelationStatistics Valid=1901, Invalid=15129, Unknown=0, NotChecked=0, Total=17030 [2021-05-21 21:19:41,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2021-05-21 21:19:41,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 515. [2021-05-21 21:19:41,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 2.167315175097276) internal successors, (1114), 514 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:41,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1114 transitions. [2021-05-21 21:19:41,299 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1114 transitions. Word has length 47 [2021-05-21 21:19:41,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:41,300 INFO L482 AbstractCegarLoop]: Abstraction has 515 states and 1114 transitions. [2021-05-21 21:19:41,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:41,300 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1114 transitions. [2021-05-21 21:19:41,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 21:19:41,300 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:41,300 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:41,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2021-05-21 21:19:41,500 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:41,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:41,501 INFO L82 PathProgramCache]: Analyzing trace with hash 247802217, now seen corresponding path program 185 times [2021-05-21 21:19:41,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:41,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007742100] [2021-05-21 21:19:41,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:41,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:41,814 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:41,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:41,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007742100] [2021-05-21 21:19:41,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007742100] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:41,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472310363] [2021-05-21 21:19:41,814 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:41,841 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-05-21 21:19:41,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:41,842 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-05-21 21:19:41,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:42,416 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:42,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472310363] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:42,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:42,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-05-21 21:19:42,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137769324] [2021-05-21 21:19:42,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-21 21:19:42,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:42,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-21 21:19:42,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1908, Unknown=0, NotChecked=0, Total=2162 [2021-05-21 21:19:42,417 INFO L87 Difference]: Start difference. First operand 515 states and 1114 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:45,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:45,646 INFO L93 Difference]: Finished difference Result 964 states and 1922 transitions. [2021-05-21 21:19:45,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-05-21 21:19:45,647 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-21 21:19:45,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:45,647 INFO L225 Difference]: With dead ends: 964 [2021-05-21 21:19:45,647 INFO L226 Difference]: Without dead ends: 920 [2021-05-21 21:19:45,648 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5770 ImplicationChecksByTransitivity, 3073.6ms TimeCoverageRelationStatistics Valid=2082, Invalid=16278, Unknown=0, NotChecked=0, Total=18360 [2021-05-21 21:19:45,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2021-05-21 21:19:45,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 521. [2021-05-21 21:19:45,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 520 states have (on average 2.173076923076923) internal successors, (1130), 520 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:45,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 1130 transitions. [2021-05-21 21:19:45,653 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 1130 transitions. Word has length 47 [2021-05-21 21:19:45,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:45,653 INFO L482 AbstractCegarLoop]: Abstraction has 521 states and 1130 transitions. [2021-05-21 21:19:45,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:45,653 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 1130 transitions. [2021-05-21 21:19:45,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 21:19:45,654 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:45,654 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:45,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable412,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:45,873 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:45,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:45,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1343845037, now seen corresponding path program 186 times [2021-05-21 21:19:45,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:45,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244579905] [2021-05-21 21:19:45,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:45,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:46,192 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:46,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:46,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244579905] [2021-05-21 21:19:46,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244579905] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:46,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629925710] [2021-05-21 21:19:46,193 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 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:46,220 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-05-21 21:19:46,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:46,221 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-05-21 21:19:46,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:46,772 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:46,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629925710] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:46,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:46,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-05-21 21:19:46,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483749235] [2021-05-21 21:19:46,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-21 21:19:46,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:46,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-21 21:19:46,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=1898, Unknown=0, NotChecked=0, Total=2162 [2021-05-21 21:19:46,773 INFO L87 Difference]: Start difference. First operand 521 states and 1130 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:50,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:50,371 INFO L93 Difference]: Finished difference Result 974 states and 1952 transitions. [2021-05-21 21:19:50,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-05-21 21:19:50,371 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-21 21:19:50,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:50,372 INFO L225 Difference]: With dead ends: 974 [2021-05-21 21:19:50,372 INFO L226 Difference]: Without dead ends: 936 [2021-05-21 21:19:50,373 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6232 ImplicationChecksByTransitivity, 3231.2ms TimeCoverageRelationStatistics Valid=2288, Invalid=17452, Unknown=0, NotChecked=0, Total=19740 [2021-05-21 21:19:50,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2021-05-21 21:19:50,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 527. [2021-05-21 21:19:50,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 526 states have (on average 2.178707224334601) internal successors, (1146), 526 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:50,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 1146 transitions. [2021-05-21 21:19:50,378 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 1146 transitions. Word has length 47 [2021-05-21 21:19:50,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:50,378 INFO L482 AbstractCegarLoop]: Abstraction has 527 states and 1146 transitions. [2021-05-21 21:19:50,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:50,378 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 1146 transitions. [2021-05-21 21:19:50,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 21:19:50,378 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:50,378 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:50,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable413,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:50,579 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:50,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:50,579 INFO L82 PathProgramCache]: Analyzing trace with hash -2118697743, now seen corresponding path program 187 times [2021-05-21 21:19:50,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:50,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597827376] [2021-05-21 21:19:50,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:50,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:50,926 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:50,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:50,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597827376] [2021-05-21 21:19:50,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597827376] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:50,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284064411] [2021-05-21 21:19:50,926 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 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:50,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:50,952 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-05-21 21:19:50,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:51,508 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:51,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284064411] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:51,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:51,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-05-21 21:19:51,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453831847] [2021-05-21 21:19:51,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-21 21:19:51,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:51,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-21 21:19:51,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=1881, Unknown=0, NotChecked=0, Total=2162 [2021-05-21 21:19:51,509 INFO L87 Difference]: Start difference. First operand 527 states and 1146 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:55,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:19:55,361 INFO L93 Difference]: Finished difference Result 1084 states and 2152 transitions. [2021-05-21 21:19:55,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-05-21 21:19:55,361 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-21 21:19:55,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:19:55,362 INFO L225 Difference]: With dead ends: 1084 [2021-05-21 21:19:55,362 INFO L226 Difference]: Without dead ends: 1039 [2021-05-21 21:19:55,363 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6553 ImplicationChecksByTransitivity, 3581.4ms TimeCoverageRelationStatistics Valid=2500, Invalid=18380, Unknown=0, NotChecked=0, Total=20880 [2021-05-21 21:19:55,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2021-05-21 21:19:55,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 531. [2021-05-21 21:19:55,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 530 states have (on average 2.1830188679245284) internal successors, (1157), 530 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:55,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 1157 transitions. [2021-05-21 21:19:55,368 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 1157 transitions. Word has length 47 [2021-05-21 21:19:55,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:19:55,368 INFO L482 AbstractCegarLoop]: Abstraction has 531 states and 1157 transitions. [2021-05-21 21:19:55,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:19:55,368 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 1157 transitions. [2021-05-21 21:19:55,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 21:19:55,369 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:19:55,369 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:19:55,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable414 [2021-05-21 21:19:55,569 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:19:55,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:19:55,569 INFO L82 PathProgramCache]: Analyzing trace with hash 911341693, now seen corresponding path program 188 times [2021-05-21 21:19:55,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:19:55,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863976111] [2021-05-21 21:19:55,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:19:55,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:19:55,922 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:55,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:19:55,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863976111] [2021-05-21 21:19:55,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863976111] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:55,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909602870] [2021-05-21 21:19:55,922 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 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:19:55,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:19:55,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:19:55,949 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-05-21 21:19:55,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:19:56,516 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:19:56,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909602870] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:19:56,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:19:56,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-05-21 21:19:56,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872317095] [2021-05-21 21:19:56,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-21 21:19:56,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:19:56,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-21 21:19:56,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=1879, Unknown=0, NotChecked=0, Total=2162 [2021-05-21 21:19:56,517 INFO L87 Difference]: Start difference. First operand 531 states and 1157 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:00,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:20:00,152 INFO L93 Difference]: Finished difference Result 937 states and 1886 transitions. [2021-05-21 21:20:00,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-05-21 21:20:00,153 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-21 21:20:00,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:20:00,153 INFO L225 Difference]: With dead ends: 937 [2021-05-21 21:20:00,153 INFO L226 Difference]: Without dead ends: 917 [2021-05-21 21:20:00,154 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5494 ImplicationChecksByTransitivity, 3349.5ms TimeCoverageRelationStatistics Valid=2362, Invalid=15460, Unknown=0, NotChecked=0, Total=17822 [2021-05-21 21:20:00,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 917 states. [2021-05-21 21:20:00,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 917 to 503. [2021-05-21 21:20:00,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 2.1553784860557768) internal successors, (1082), 502 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:00,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 1082 transitions. [2021-05-21 21:20:00,159 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 1082 transitions. Word has length 47 [2021-05-21 21:20:00,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:20:00,159 INFO L482 AbstractCegarLoop]: Abstraction has 503 states and 1082 transitions. [2021-05-21 21:20:00,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:00,159 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 1082 transitions. [2021-05-21 21:20:00,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 21:20:00,160 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:20:00,160 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:20:00,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable415,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:20:00,360 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:20:00,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:20:00,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1288752927, now seen corresponding path program 189 times [2021-05-21 21:20:00,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:20:00,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602836928] [2021-05-21 21:20:00,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:20:00,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:20:00,678 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:20:00,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:20:00,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602836928] [2021-05-21 21:20:00,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602836928] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:20:00,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524716433] [2021-05-21 21:20:00,678 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:20:00,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-05-21 21:20:00,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:20:00,710 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-05-21 21:20:00,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:20:01,278 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:20:01,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524716433] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:20:01,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:20:01,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-05-21 21:20:01,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377010832] [2021-05-21 21:20:01,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-21 21:20:01,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:20:01,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-21 21:20:01,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=1910, Unknown=0, NotChecked=0, Total=2162 [2021-05-21 21:20:01,279 INFO L87 Difference]: Start difference. First operand 503 states and 1082 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:04,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:20:04,575 INFO L93 Difference]: Finished difference Result 924 states and 1824 transitions. [2021-05-21 21:20:04,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-05-21 21:20:04,575 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-21 21:20:04,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:20:04,576 INFO L225 Difference]: With dead ends: 924 [2021-05-21 21:20:04,576 INFO L226 Difference]: Without dead ends: 874 [2021-05-21 21:20:04,577 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5456 ImplicationChecksByTransitivity, 3070.9ms TimeCoverageRelationStatistics Valid=1879, Invalid=15413, Unknown=0, NotChecked=0, Total=17292 [2021-05-21 21:20:04,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2021-05-21 21:20:04,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 507. [2021-05-21 21:20:04,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 2.1541501976284585) internal successors, (1090), 506 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:04,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 1090 transitions. [2021-05-21 21:20:04,581 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 1090 transitions. Word has length 47 [2021-05-21 21:20:04,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:20:04,581 INFO L482 AbstractCegarLoop]: Abstraction has 507 states and 1090 transitions. [2021-05-21 21:20:04,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:04,582 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 1090 transitions. [2021-05-21 21:20:04,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 21:20:04,582 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:20:04,582 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:20:04,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable416 [2021-05-21 21:20:04,798 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:20:04,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:20:04,798 INFO L82 PathProgramCache]: Analyzing trace with hash -258590427, now seen corresponding path program 190 times [2021-05-21 21:20:04,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:20:04,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911054012] [2021-05-21 21:20:04,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:20:04,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:20:05,121 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:20:05,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:20:05,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911054012] [2021-05-21 21:20:05,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911054012] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:20:05,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410257307] [2021-05-21 21:20:05,121 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:20:05,146 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:20:05,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:20:05,147 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-05-21 21:20:05,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:20:05,711 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:20:05,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410257307] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:20:05,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:20:05,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-05-21 21:20:05,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544146360] [2021-05-21 21:20:05,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-21 21:20:05,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:20:05,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-21 21:20:05,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=1904, Unknown=0, NotChecked=0, Total=2162 [2021-05-21 21:20:05,712 INFO L87 Difference]: Start difference. First operand 507 states and 1090 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:08,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:20:08,969 INFO L93 Difference]: Finished difference Result 933 states and 1853 transitions. [2021-05-21 21:20:08,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-05-21 21:20:08,970 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-21 21:20:08,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:20:08,970 INFO L225 Difference]: With dead ends: 933 [2021-05-21 21:20:08,970 INFO L226 Difference]: Without dead ends: 889 [2021-05-21 21:20:08,972 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5922 ImplicationChecksByTransitivity, 3167.7ms TimeCoverageRelationStatistics Valid=2078, Invalid=16554, Unknown=0, NotChecked=0, Total=18632 [2021-05-21 21:20:08,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2021-05-21 21:20:08,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 513. [2021-05-21 21:20:08,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 512 states have (on average 2.16015625) internal successors, (1106), 512 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:08,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 1106 transitions. [2021-05-21 21:20:08,977 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 1106 transitions. Word has length 47 [2021-05-21 21:20:08,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:20:08,977 INFO L482 AbstractCegarLoop]: Abstraction has 513 states and 1106 transitions. [2021-05-21 21:20:08,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:08,977 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 1106 transitions. [2021-05-21 21:20:08,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 21:20:08,977 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:20:08,977 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:20:09,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable417,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:20:09,179 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:20:09,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:20:09,179 INFO L82 PathProgramCache]: Analyzing trace with hash 837452393, now seen corresponding path program 191 times [2021-05-21 21:20:09,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:20:09,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5373241] [2021-05-21 21:20:09,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:20:09,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:20:09,492 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:20:09,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:20:09,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5373241] [2021-05-21 21:20:09,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5373241] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:20:09,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272529084] [2021-05-21 21:20:09,493 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 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:20:09,524 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-05-21 21:20:09,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:20:09,525 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-05-21 21:20:09,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:20:10,087 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:20:10,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272529084] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:20:10,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:20:10,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-05-21 21:20:10,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800528603] [2021-05-21 21:20:10,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-21 21:20:10,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:20:10,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-21 21:20:10,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=1894, Unknown=0, NotChecked=0, Total=2162 [2021-05-21 21:20:10,088 INFO L87 Difference]: Start difference. First operand 513 states and 1106 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:13,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:20:13,660 INFO L93 Difference]: Finished difference Result 945 states and 1887 transitions. [2021-05-21 21:20:13,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-05-21 21:20:13,660 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-21 21:20:13,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:20:13,661 INFO L225 Difference]: With dead ends: 945 [2021-05-21 21:20:13,661 INFO L226 Difference]: Without dead ends: 907 [2021-05-21 21:20:13,662 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6385 ImplicationChecksByTransitivity, 3279.2ms TimeCoverageRelationStatistics Valid=2293, Invalid=17729, Unknown=0, NotChecked=0, Total=20022 [2021-05-21 21:20:13,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2021-05-21 21:20:13,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 519. [2021-05-21 21:20:13,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 518 states have (on average 2.166023166023166) internal successors, (1122), 518 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:13,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 1122 transitions. [2021-05-21 21:20:13,667 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 1122 transitions. Word has length 47 [2021-05-21 21:20:13,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:20:13,667 INFO L482 AbstractCegarLoop]: Abstraction has 519 states and 1122 transitions. [2021-05-21 21:20:13,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:13,667 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 1122 transitions. [2021-05-21 21:20:13,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 21:20:13,667 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:20:13,667 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:20:13,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable418,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:20:13,868 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:20:13,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:20:13,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1669876909, now seen corresponding path program 192 times [2021-05-21 21:20:13,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:20:13,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066839917] [2021-05-21 21:20:13,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:20:13,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:20:14,218 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:20:14,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:20:14,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066839917] [2021-05-21 21:20:14,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066839917] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:20:14,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113433245] [2021-05-21 21:20:14,218 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 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:20:14,252 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-05-21 21:20:14,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:20:14,253 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-05-21 21:20:14,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:20:14,835 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:20:14,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113433245] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:20:14,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:20:14,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-05-21 21:20:14,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381079764] [2021-05-21 21:20:14,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-21 21:20:14,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:20:14,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-21 21:20:14,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=1877, Unknown=0, NotChecked=0, Total=2162 [2021-05-21 21:20:14,836 INFO L87 Difference]: Start difference. First operand 519 states and 1122 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:18,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:20:18,728 INFO L93 Difference]: Finished difference Result 1057 states and 2091 transitions. [2021-05-21 21:20:18,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-05-21 21:20:18,729 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-21 21:20:18,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:20:18,730 INFO L225 Difference]: With dead ends: 1057 [2021-05-21 21:20:18,730 INFO L226 Difference]: Without dead ends: 1012 [2021-05-21 21:20:18,730 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6706 ImplicationChecksByTransitivity, 3653.5ms TimeCoverageRelationStatistics Valid=2514, Invalid=18656, Unknown=0, NotChecked=0, Total=21170 [2021-05-21 21:20:18,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1012 states. [2021-05-21 21:20:18,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1012 to 523. [2021-05-21 21:20:18,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 522 states have (on average 2.1704980842911876) internal successors, (1133), 522 states have internal predecessors, (1133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:18,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 1133 transitions. [2021-05-21 21:20:18,736 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 1133 transitions. Word has length 47 [2021-05-21 21:20:18,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:20:18,736 INFO L482 AbstractCegarLoop]: Abstraction has 523 states and 1133 transitions. [2021-05-21 21:20:18,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:18,736 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 1133 transitions. [2021-05-21 21:20:18,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 21:20:18,736 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:20:18,736 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:20:18,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable419 [2021-05-21 21:20:18,937 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:20:18,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:20:18,937 INFO L82 PathProgramCache]: Analyzing trace with hash 404949049, now seen corresponding path program 193 times [2021-05-21 21:20:18,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:20:18,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706828701] [2021-05-21 21:20:18,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:20:18,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:20:19,286 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:20:19,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:20:19,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706828701] [2021-05-21 21:20:19,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706828701] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:20:19,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135256395] [2021-05-21 21:20:19,286 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 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:20:19,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:20:19,312 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-05-21 21:20:19,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:20:19,877 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:20:19,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135256395] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:20:19,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:20:19,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-05-21 21:20:19,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714608676] [2021-05-21 21:20:19,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-21 21:20:19,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:20:19,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-21 21:20:19,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=1875, Unknown=0, NotChecked=0, Total=2162 [2021-05-21 21:20:19,878 INFO L87 Difference]: Start difference. First operand 523 states and 1133 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:23,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:20:23,397 INFO L93 Difference]: Finished difference Result 913 states and 1830 transitions. [2021-05-21 21:20:23,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-05-21 21:20:23,397 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-21 21:20:23,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:20:23,398 INFO L225 Difference]: With dead ends: 913 [2021-05-21 21:20:23,398 INFO L226 Difference]: Without dead ends: 893 [2021-05-21 21:20:23,399 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5632 ImplicationChecksByTransitivity, 3415.5ms TimeCoverageRelationStatistics Valid=2386, Invalid=15704, Unknown=0, NotChecked=0, Total=18090 [2021-05-21 21:20:23,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2021-05-21 21:20:23,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 501. [2021-05-21 21:20:23,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 500 states have (on average 2.148) internal successors, (1074), 500 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:23,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 1074 transitions. [2021-05-21 21:20:23,404 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 1074 transitions. Word has length 47 [2021-05-21 21:20:23,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:20:23,404 INFO L482 AbstractCegarLoop]: Abstraction has 501 states and 1074 transitions. [2021-05-21 21:20:23,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:23,404 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 1074 transitions. [2021-05-21 21:20:23,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 21:20:23,404 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:20:23,404 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:20:23,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable420 [2021-05-21 21:20:23,605 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:20:23,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:20:23,605 INFO L82 PathProgramCache]: Analyzing trace with hash -308279327, now seen corresponding path program 194 times [2021-05-21 21:20:23,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:20:23,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288805441] [2021-05-21 21:20:23,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:20:23,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:20:23,918 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:20:23,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:20:23,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288805441] [2021-05-21 21:20:23,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288805441] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:20:23,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731562263] [2021-05-21 21:20:23,919 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 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:20:23,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:20:23,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:20:23,952 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-05-21 21:20:23,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:20:24,523 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:20:24,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731562263] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:20:24,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:20:24,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-05-21 21:20:24,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835433961] [2021-05-21 21:20:24,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-21 21:20:24,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:20:24,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-21 21:20:24,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=1901, Unknown=0, NotChecked=0, Total=2162 [2021-05-21 21:20:24,524 INFO L87 Difference]: Start difference. First operand 501 states and 1074 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:27,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:20:27,993 INFO L93 Difference]: Finished difference Result 901 states and 1781 transitions. [2021-05-21 21:20:27,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-05-21 21:20:27,994 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-21 21:20:27,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:20:27,994 INFO L225 Difference]: With dead ends: 901 [2021-05-21 21:20:27,994 INFO L226 Difference]: Without dead ends: 857 [2021-05-21 21:20:27,995 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6064 ImplicationChecksByTransitivity, 3151.0ms TimeCoverageRelationStatistics Valid=2049, Invalid=16857, Unknown=0, NotChecked=0, Total=18906 [2021-05-21 21:20:27,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2021-05-21 21:20:28,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 505. [2021-05-21 21:20:28,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 2.1468253968253967) internal successors, (1082), 504 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:28,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1082 transitions. [2021-05-21 21:20:28,005 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1082 transitions. Word has length 47 [2021-05-21 21:20:28,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:20:28,005 INFO L482 AbstractCegarLoop]: Abstraction has 505 states and 1082 transitions. [2021-05-21 21:20:28,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:28,005 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1082 transitions. [2021-05-21 21:20:28,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 21:20:28,005 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:20:28,005 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:20:28,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable421 [2021-05-21 21:20:28,206 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:20:28,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:20:28,206 INFO L82 PathProgramCache]: Analyzing trace with hash 787763493, now seen corresponding path program 195 times [2021-05-21 21:20:28,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:20:28,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532102] [2021-05-21 21:20:28,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:20:28,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:20:28,519 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:20:28,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:20:28,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532102] [2021-05-21 21:20:28,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532102] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:20:28,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397837311] [2021-05-21 21:20:28,519 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 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:20:28,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-05-21 21:20:28,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:20:28,550 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 74 conjunts are in the unsatisfiable core [2021-05-21 21:20:28,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:20:29,144 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:20:29,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397837311] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:20:29,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:20:29,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 47 [2021-05-21 21:20:29,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754655970] [2021-05-21 21:20:29,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-05-21 21:20:29,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:20:29,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-05-21 21:20:29,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=1977, Unknown=0, NotChecked=0, Total=2256 [2021-05-21 21:20:29,145 INFO L87 Difference]: Start difference. First operand 505 states and 1082 transitions. Second operand has 48 states, 48 states have (on average 1.9166666666666667) internal successors, (92), 47 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:32,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:20:32,667 INFO L93 Difference]: Finished difference Result 907 states and 1805 transitions. [2021-05-21 21:20:32,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-05-21 21:20:32,668 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.9166666666666667) internal successors, (92), 47 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-21 21:20:32,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:20:32,668 INFO L225 Difference]: With dead ends: 907 [2021-05-21 21:20:32,668 INFO L226 Difference]: Without dead ends: 875 [2021-05-21 21:20:32,669 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6572 ImplicationChecksByTransitivity, 3297.7ms TimeCoverageRelationStatistics Valid=2282, Invalid=18024, Unknown=0, NotChecked=0, Total=20306 [2021-05-21 21:20:32,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2021-05-21 21:20:32,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 510. [2021-05-21 21:20:32,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 509 states have (on average 2.1532416502946954) internal successors, (1096), 509 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:32,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 1096 transitions. [2021-05-21 21:20:32,674 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 1096 transitions. Word has length 47 [2021-05-21 21:20:32,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:20:32,674 INFO L482 AbstractCegarLoop]: Abstraction has 510 states and 1096 transitions. [2021-05-21 21:20:32,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 1.9166666666666667) internal successors, (92), 47 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:32,674 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 1096 transitions. [2021-05-21 21:20:32,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 21:20:32,675 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:20:32,675 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:20:32,875 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable422 [2021-05-21 21:20:32,875 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:20:32,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:20:32,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1620188009, now seen corresponding path program 196 times [2021-05-21 21:20:32,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:20:32,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30082853] [2021-05-21 21:20:32,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:20:32,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:20:33,225 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:20:33,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:20:33,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30082853] [2021-05-21 21:20:33,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30082853] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:20:33,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853137383] [2021-05-21 21:20:33,226 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:20:33,250 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:20:33,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:20:33,252 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-05-21 21:20:33,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:20:33,830 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:20:33,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853137383] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:20:33,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:20:33,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-05-21 21:20:33,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107848827] [2021-05-21 21:20:33,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-21 21:20:33,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:20:33,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-21 21:20:33,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=1874, Unknown=0, NotChecked=0, Total=2162 [2021-05-21 21:20:33,831 INFO L87 Difference]: Start difference. First operand 510 states and 1096 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:37,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:20:37,821 INFO L93 Difference]: Finished difference Result 1031 states and 2030 transitions. [2021-05-21 21:20:37,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-05-21 21:20:37,821 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-21 21:20:37,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:20:37,822 INFO L225 Difference]: With dead ends: 1031 [2021-05-21 21:20:37,822 INFO L226 Difference]: Without dead ends: 977 [2021-05-21 21:20:37,823 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6988 ImplicationChecksByTransitivity, 3767.7ms TimeCoverageRelationStatistics Valid=2535, Invalid=19221, Unknown=0, NotChecked=0, Total=21756 [2021-05-21 21:20:37,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2021-05-21 21:20:37,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 515. [2021-05-21 21:20:37,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 2.157587548638132) internal successors, (1109), 514 states have internal predecessors, (1109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:37,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1109 transitions. [2021-05-21 21:20:37,828 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1109 transitions. Word has length 47 [2021-05-21 21:20:37,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:20:37,828 INFO L482 AbstractCegarLoop]: Abstraction has 515 states and 1109 transitions. [2021-05-21 21:20:37,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:37,828 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1109 transitions. [2021-05-21 21:20:37,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 21:20:37,829 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:20:37,829 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:20:38,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable423 [2021-05-21 21:20:38,029 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:20:38,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:20:38,029 INFO L82 PathProgramCache]: Analyzing trace with hash 355260149, now seen corresponding path program 197 times [2021-05-21 21:20:38,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:20:38,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910753358] [2021-05-21 21:20:38,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:20:38,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:20:38,387 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:20:38,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:20:38,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910753358] [2021-05-21 21:20:38,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910753358] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:20:38,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256272977] [2021-05-21 21:20:38,388 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:20:38,415 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-05-21 21:20:38,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:20:38,416 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-05-21 21:20:38,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:20:38,982 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:20:38,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256272977] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:20:38,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:20:38,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-05-21 21:20:38,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865555936] [2021-05-21 21:20:38,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-21 21:20:38,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:20:38,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-21 21:20:38,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=1872, Unknown=0, NotChecked=0, Total=2162 [2021-05-21 21:20:38,983 INFO L87 Difference]: Start difference. First operand 515 states and 1109 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:42,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:20:42,830 INFO L93 Difference]: Finished difference Result 881 states and 1758 transitions. [2021-05-21 21:20:42,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-05-21 21:20:42,830 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-21 21:20:42,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:20:42,831 INFO L225 Difference]: With dead ends: 881 [2021-05-21 21:20:42,831 INFO L226 Difference]: Without dead ends: 861 [2021-05-21 21:20:42,832 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5783 ImplicationChecksByTransitivity, 3475.8ms TimeCoverageRelationStatistics Valid=2393, Invalid=15967, Unknown=0, NotChecked=0, Total=18360 [2021-05-21 21:20:42,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2021-05-21 21:20:42,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 499. [2021-05-21 21:20:42,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 498 states have (on average 2.140562248995984) internal successors, (1066), 498 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:42,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 1066 transitions. [2021-05-21 21:20:42,836 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 1066 transitions. Word has length 47 [2021-05-21 21:20:42,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:20:42,836 INFO L482 AbstractCegarLoop]: Abstraction has 499 states and 1066 transitions. [2021-05-21 21:20:42,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:42,836 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 1066 transitions. [2021-05-21 21:20:42,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 21:20:42,837 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:20:42,837 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:20:43,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable424 [2021-05-21 21:20:43,037 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:20:43,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:20:43,037 INFO L82 PathProgramCache]: Analyzing trace with hash -329605407, now seen corresponding path program 198 times [2021-05-21 21:20:43,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:20:43,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176836688] [2021-05-21 21:20:43,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:20:43,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:20:43,351 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:20:43,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:20:43,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176836688] [2021-05-21 21:20:43,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176836688] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:20:43,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308542345] [2021-05-21 21:20:43,352 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:20:43,380 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-05-21 21:20:43,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:20:43,381 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-05-21 21:20:43,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:20:43,954 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:20:43,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308542345] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:20:43,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:20:43,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-05-21 21:20:43,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649823702] [2021-05-21 21:20:43,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-21 21:20:43,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:20:43,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-21 21:20:43,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=1889, Unknown=0, NotChecked=0, Total=2162 [2021-05-21 21:20:43,955 INFO L87 Difference]: Start difference. First operand 499 states and 1066 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:47,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:20:47,752 INFO L93 Difference]: Finished difference Result 858 states and 1689 transitions. [2021-05-21 21:20:47,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-05-21 21:20:47,752 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-21 21:20:47,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:20:47,753 INFO L225 Difference]: With dead ends: 858 [2021-05-21 21:20:47,753 INFO L226 Difference]: Without dead ends: 820 [2021-05-21 21:20:47,754 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6703 ImplicationChecksByTransitivity, 3380.1ms TimeCoverageRelationStatistics Valid=2246, Invalid=18346, Unknown=0, NotChecked=0, Total=20592 [2021-05-21 21:20:47,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2021-05-21 21:20:47,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 503. [2021-05-21 21:20:47,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 2.139442231075697) internal successors, (1074), 502 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:47,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 1074 transitions. [2021-05-21 21:20:47,764 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 1074 transitions. Word has length 47 [2021-05-21 21:20:47,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:20:47,764 INFO L482 AbstractCegarLoop]: Abstraction has 503 states and 1074 transitions. [2021-05-21 21:20:47,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:47,764 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 1074 transitions. [2021-05-21 21:20:47,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 21:20:47,765 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:20:47,765 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:20:47,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable425,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:20:47,965 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:20:47,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:20:47,966 INFO L82 PathProgramCache]: Analyzing trace with hash 502819109, now seen corresponding path program 199 times [2021-05-21 21:20:47,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:20:47,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291673184] [2021-05-21 21:20:47,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:20:47,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:20:48,318 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:20:48,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:20:48,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291673184] [2021-05-21 21:20:48,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291673184] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:20:48,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938504696] [2021-05-21 21:20:48,318 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 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:20:48,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:20:48,344 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-05-21 21:20:48,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:20:48,915 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:20:48,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938504696] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:20:48,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:20:48,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-05-21 21:20:48,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110969264] [2021-05-21 21:20:48,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-21 21:20:48,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:20:48,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-21 21:20:48,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=1872, Unknown=0, NotChecked=0, Total=2162 [2021-05-21 21:20:48,916 INFO L87 Difference]: Start difference. First operand 503 states and 1074 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:53,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:20:53,071 INFO L93 Difference]: Finished difference Result 963 states and 1875 transitions. [2021-05-21 21:20:53,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-05-21 21:20:53,071 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-21 21:20:53,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:20:53,072 INFO L225 Difference]: With dead ends: 963 [2021-05-21 21:20:53,072 INFO L226 Difference]: Without dead ends: 918 [2021-05-21 21:20:53,073 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7057 ImplicationChecksByTransitivity, 3694.9ms TimeCoverageRelationStatistics Valid=2494, Invalid=19262, Unknown=0, NotChecked=0, Total=21756 [2021-05-21 21:20:53,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2021-05-21 21:20:53,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 505. [2021-05-21 21:20:53,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 2.140873015873016) internal successors, (1079), 504 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:53,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1079 transitions. [2021-05-21 21:20:53,078 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1079 transitions. Word has length 47 [2021-05-21 21:20:53,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:20:53,078 INFO L482 AbstractCegarLoop]: Abstraction has 505 states and 1079 transitions. [2021-05-21 21:20:53,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:53,078 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1079 transitions. [2021-05-21 21:20:53,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 21:20:53,078 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:20:53,078 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:20:53,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable426 [2021-05-21 21:20:53,278 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:20:53,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:20:53,279 INFO L82 PathProgramCache]: Analyzing trace with hash -762108751, now seen corresponding path program 200 times [2021-05-21 21:20:53,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:20:53,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500647011] [2021-05-21 21:20:53,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:20:53,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:20:53,626 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:20:53,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:20:53,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500647011] [2021-05-21 21:20:53,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500647011] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:20:53,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333058411] [2021-05-21 21:20:53,626 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 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:20:53,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:20:53,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:20:53,652 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-05-21 21:20:53,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:20:54,234 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:20:54,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333058411] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:20:54,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:20:54,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-05-21 21:20:54,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630119116] [2021-05-21 21:20:54,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-21 21:20:54,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:20:54,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-21 21:20:54,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=1870, Unknown=0, NotChecked=0, Total=2162 [2021-05-21 21:20:54,235 INFO L87 Difference]: Start difference. First operand 505 states and 1079 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:57,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:20:57,997 INFO L93 Difference]: Finished difference Result 845 states and 1674 transitions. [2021-05-21 21:20:57,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-05-21 21:20:57,997 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-21 21:20:57,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:20:57,998 INFO L225 Difference]: With dead ends: 845 [2021-05-21 21:20:57,998 INFO L226 Difference]: Without dead ends: 825 [2021-05-21 21:20:57,998 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5942 ImplicationChecksByTransitivity, 3500.4ms TimeCoverageRelationStatistics Valid=2384, Invalid=16248, Unknown=0, NotChecked=0, Total=18632 [2021-05-21 21:20:57,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2021-05-21 21:20:58,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 493. [2021-05-21 21:20:58,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 2.1260162601626016) internal successors, (1046), 492 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:58,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 1046 transitions. [2021-05-21 21:20:58,003 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 1046 transitions. Word has length 47 [2021-05-21 21:20:58,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:20:58,003 INFO L482 AbstractCegarLoop]: Abstraction has 493 states and 1046 transitions. [2021-05-21 21:20:58,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:20:58,003 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 1046 transitions. [2021-05-21 21:20:58,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 21:20:58,003 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:20:58,003 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:20:58,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable427,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:20:58,204 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:20:58,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:20:58,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1227950623, now seen corresponding path program 201 times [2021-05-21 21:20:58,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:20:58,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813697380] [2021-05-21 21:20:58,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:20:58,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:20:58,491 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:20:58,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:20:58,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813697380] [2021-05-21 21:20:58,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813697380] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:20:58,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34805794] [2021-05-21 21:20:58,492 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 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:20:58,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-05-21 21:20:58,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:20:58,520 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-05-21 21:20:58,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:20:59,085 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:20:59,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34805794] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:20:59,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:20:59,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-05-21 21:20:59,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268187131] [2021-05-21 21:20:59,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-21 21:20:59,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:20:59,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-21 21:20:59,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=1873, Unknown=0, NotChecked=0, Total=2162 [2021-05-21 21:20:59,086 INFO L87 Difference]: Start difference. First operand 493 states and 1046 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:21:03,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:21:03,487 INFO L93 Difference]: Finished difference Result 986 states and 1986 transitions. [2021-05-21 21:21:03,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2021-05-21 21:21:03,487 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-21 21:21:03,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:21:03,489 INFO L225 Difference]: With dead ends: 986 [2021-05-21 21:21:03,489 INFO L226 Difference]: Without dead ends: 938 [2021-05-21 21:21:03,490 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8617 ImplicationChecksByTransitivity, 4164.0ms TimeCoverageRelationStatistics Valid=2834, Invalid=22606, Unknown=0, NotChecked=0, Total=25440 [2021-05-21 21:21:03,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2021-05-21 21:21:03,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 509. [2021-05-21 21:21:03,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 508 states have (on average 2.127952755905512) internal successors, (1081), 508 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:21:03,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 1081 transitions. [2021-05-21 21:21:03,495 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 1081 transitions. Word has length 47 [2021-05-21 21:21:03,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:21:03,495 INFO L482 AbstractCegarLoop]: Abstraction has 509 states and 1081 transitions. [2021-05-21 21:21:03,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:21:03,495 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 1081 transitions. [2021-05-21 21:21:03,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 21:21:03,495 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:21:03,496 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:21:03,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable428,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:21:03,696 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:21:03,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:21:03,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1802088813, now seen corresponding path program 202 times [2021-05-21 21:21:03,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:21:03,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764698259] [2021-05-21 21:21:03,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:21:03,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:21:03,991 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:21:03,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:21:03,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764698259] [2021-05-21 21:21:03,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764698259] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:21:03,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078946959] [2021-05-21 21:21:03,991 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 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:21:04,015 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:21:04,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:21:04,016 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-05-21 21:21:04,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:21:04,563 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:21:04,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078946959] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:21:04,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:21:04,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-05-21 21:21:04,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670371209] [2021-05-21 21:21:04,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-21 21:21:04,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:21:04,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-21 21:21:04,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=1857, Unknown=0, NotChecked=0, Total=2162 [2021-05-21 21:21:04,564 INFO L87 Difference]: Start difference. First operand 509 states and 1081 transitions. Second operand has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:21:08,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:21:08,679 INFO L93 Difference]: Finished difference Result 1017 states and 2034 transitions. [2021-05-21 21:21:08,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-05-21 21:21:08,679 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-21 21:21:08,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:21:08,680 INFO L225 Difference]: With dead ends: 1017 [2021-05-21 21:21:08,680 INFO L226 Difference]: Without dead ends: 969 [2021-05-21 21:21:08,680 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6758 ImplicationChecksByTransitivity, 3513.3ms TimeCoverageRelationStatistics Valid=2550, Invalid=18330, Unknown=0, NotChecked=0, Total=20880 [2021-05-21 21:21:08,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 969 states. [2021-05-21 21:21:08,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 969 to 506. [2021-05-21 21:21:08,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 2.120792079207921) internal successors, (1071), 505 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:21:08,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1071 transitions. [2021-05-21 21:21:08,685 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1071 transitions. Word has length 47 [2021-05-21 21:21:08,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:21:08,685 INFO L482 AbstractCegarLoop]: Abstraction has 506 states and 1071 transitions. [2021-05-21 21:21:08,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 46 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:21:08,686 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1071 transitions. [2021-05-21 21:21:08,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 21:21:08,686 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:21:08,686 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:21:08,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable429,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:21:08,886 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:21:08,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:21:08,887 INFO L82 PathProgramCache]: Analyzing trace with hash 635930283, now seen corresponding path program 203 times [2021-05-21 21:21:08,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:21:08,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435752337] [2021-05-21 21:21:08,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:21:08,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:21:09,261 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:21:09,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:21:09,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435752337] [2021-05-21 21:21:09,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435752337] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:21:09,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874589772] [2021-05-21 21:21:09,261 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 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:21:09,289 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-05-21 21:21:09,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:21:09,290 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 73 conjunts are in the unsatisfiable core [2021-05-21 21:21:09,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:21:09,915 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:21:09,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874589772] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:21:09,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:21:09,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 39 [2021-05-21 21:21:09,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192730755] [2021-05-21 21:21:09,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-21 21:21:09,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:21:09,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-21 21:21:09,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1432, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 21:21:09,916 INFO L87 Difference]: Start difference. First operand 506 states and 1071 transitions. Second operand has 40 states, 40 states have (on average 1.9) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:21:17,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:21:17,246 INFO L93 Difference]: Finished difference Result 1005 states and 2058 transitions. [2021-05-21 21:21:17,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2021-05-21 21:21:17,246 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.9) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-21 21:21:17,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:21:17,247 INFO L225 Difference]: With dead ends: 1005 [2021-05-21 21:21:17,247 INFO L226 Difference]: Without dead ends: 979 [2021-05-21 21:21:17,248 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8517 ImplicationChecksByTransitivity, 6357.4ms TimeCoverageRelationStatistics Valid=1668, Invalid=22202, Unknown=0, NotChecked=0, Total=23870 [2021-05-21 21:21:17,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 979 states. [2021-05-21 21:21:17,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 979 to 479. [2021-05-21 21:21:17,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 478 states have (on average 2.1297071129707112) internal successors, (1018), 478 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:21:17,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1018 transitions. [2021-05-21 21:21:17,253 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1018 transitions. Word has length 47 [2021-05-21 21:21:17,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:21:17,253 INFO L482 AbstractCegarLoop]: Abstraction has 479 states and 1018 transitions. [2021-05-21 21:21:17,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.9) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:21:17,253 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1018 transitions. [2021-05-21 21:21:17,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-21 21:21:17,253 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:21:17,253 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:21:17,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable430 [2021-05-21 21:21:17,454 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:21:17,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:21:17,454 INFO L82 PathProgramCache]: Analyzing trace with hash -820206049, now seen corresponding path program 204 times [2021-05-21 21:21:17,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:21:17,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990057602] [2021-05-21 21:21:17,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:21:17,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:21:17,533 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-21 21:21:17,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:21:17,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990057602] [2021-05-21 21:21:17,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990057602] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:21:17,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800510368] [2021-05-21 21:21:17,534 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 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:21:17,563 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-05-21 21:21:17,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:21:17,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-21 21:21:17,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:21:17,637 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-21 21:21:17,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800510368] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:21:17,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:21:17,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-05-21 21:21:17,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457499337] [2021-05-21 21:21:17,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 21:21:17,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:21:17,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 21:21:17,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:21:17,638 INFO L87 Difference]: Start difference. First operand 479 states and 1018 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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) [2021-05-21 21:21:17,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:21:17,832 INFO L93 Difference]: Finished difference Result 794 states and 1629 transitions. [2021-05-21 21:21:17,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 21:21:17,832 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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 49 [2021-05-21 21:21:17,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:21:17,832 INFO L225 Difference]: With dead ends: 794 [2021-05-21 21:21:17,832 INFO L226 Difference]: Without dead ends: 719 [2021-05-21 21:21:17,833 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 127.5ms TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-05-21 21:21:17,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2021-05-21 21:21:17,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 539. [2021-05-21 21:21:17,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 538 states have (on average 2.1282527881040894) internal successors, (1145), 538 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:21:17,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 1145 transitions. [2021-05-21 21:21:17,837 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 1145 transitions. Word has length 49 [2021-05-21 21:21:17,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:21:17,837 INFO L482 AbstractCegarLoop]: Abstraction has 539 states and 1145 transitions. [2021-05-21 21:21:17,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 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) [2021-05-21 21:21:17,837 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 1145 transitions. [2021-05-21 21:21:17,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-21 21:21:17,837 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:21:17,837 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:21:18,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable431,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:21:18,038 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:21:18,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:21:18,038 INFO L82 PathProgramCache]: Analyzing trace with hash -300420567, now seen corresponding path program 205 times [2021-05-21 21:21:18,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:21:18,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111170729] [2021-05-21 21:21:18,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:21:18,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:21:18,453 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:21:18,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:21:18,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111170729] [2021-05-21 21:21:18,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111170729] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:21:18,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348790355] [2021-05-21 21:21:18,453 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 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:21:18,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:21:18,480 WARN L261 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 77 conjunts are in the unsatisfiable core [2021-05-21 21:21:18,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:21:19,204 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:21:19,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348790355] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:21:19,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:21:19,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 47 [2021-05-21 21:21:19,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001941080] [2021-05-21 21:21:19,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-05-21 21:21:19,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:21:19,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-05-21 21:21:19,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=2027, Unknown=0, NotChecked=0, Total=2256 [2021-05-21 21:21:19,205 INFO L87 Difference]: Start difference. First operand 539 states and 1145 transitions. Second operand has 48 states, 48 states have (on average 1.9791666666666667) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:21:26,474 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 72 [2021-05-21 21:21:27,724 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 72 [2021-05-21 21:21:31,368 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 64 [2021-05-21 21:21:31,527 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2021-05-21 21:21:33,698 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 81 [2021-05-21 21:21:33,873 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 85 [2021-05-21 21:21:34,082 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 90 [2021-05-21 21:21:34,259 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 84 [2021-05-21 21:21:36,178 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 90 [2021-05-21 21:21:36,435 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 81 [2021-05-21 21:21:36,623 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 84 [2021-05-21 21:21:36,854 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 82 [2021-05-21 21:21:37,515 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 79 [2021-05-21 21:21:40,351 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2021-05-21 21:21:43,924 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2021-05-21 21:21:54,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:21:54,127 INFO L93 Difference]: Finished difference Result 4196 states and 8343 transitions. [2021-05-21 21:21:54,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 467 states. [2021-05-21 21:21:54,128 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.9791666666666667) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-05-21 21:21:54,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:21:54,131 INFO L225 Difference]: With dead ends: 4196 [2021-05-21 21:21:54,131 INFO L226 Difference]: Without dead ends: 4128 [2021-05-21 21:21:54,138 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 481 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107198 ImplicationChecksByTransitivity, 30264.3ms TimeCoverageRelationStatistics Valid=25835, Invalid=206971, Unknown=0, NotChecked=0, Total=232806 [2021-05-21 21:21:54,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4128 states. [2021-05-21 21:21:54,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4128 to 953. [2021-05-21 21:21:54,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 953 states, 952 states have (on average 2.1449579831932772) internal successors, (2042), 952 states have internal predecessors, (2042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:21:54,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953 states to 953 states and 2042 transitions. [2021-05-21 21:21:54,153 INFO L78 Accepts]: Start accepts. Automaton has 953 states and 2042 transitions. Word has length 49 [2021-05-21 21:21:54,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:21:54,153 INFO L482 AbstractCegarLoop]: Abstraction has 953 states and 2042 transitions. [2021-05-21 21:21:54,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 1.9791666666666667) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:21:54,153 INFO L276 IsEmpty]: Start isEmpty. Operand 953 states and 2042 transitions. [2021-05-21 21:21:54,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-21 21:21:54,154 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:21:54,154 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:21:54,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-05-21 21:21:54,354 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:21:54,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:21:54,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1788875737, now seen corresponding path program 206 times [2021-05-21 21:21:54,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:21:54,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825087196] [2021-05-21 21:21:54,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:21:54,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:21:54,761 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:21:54,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:21:54,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825087196] [2021-05-21 21:21:54,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825087196] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:21:54,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587279143] [2021-05-21 21:21:54,762 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 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:21:54,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:21:54,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:21:54,788 WARN L261 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 74 conjunts are in the unsatisfiable core [2021-05-21 21:21:54,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:21:55,520 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:21:55,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587279143] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:21:55,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:21:55,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 47 [2021-05-21 21:21:55,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938598060] [2021-05-21 21:21:55,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-05-21 21:21:55,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:21:55,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-05-21 21:21:55,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=2098, Unknown=0, NotChecked=0, Total=2256 [2021-05-21 21:21:55,521 INFO L87 Difference]: Start difference. First operand 953 states and 2042 transitions. Second operand has 48 states, 48 states have (on average 2.0) internal successors, (96), 47 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:21:59,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:21:59,816 INFO L93 Difference]: Finished difference Result 1583 states and 3270 transitions. [2021-05-21 21:21:59,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2021-05-21 21:21:59,816 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0) internal successors, (96), 47 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-05-21 21:21:59,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:21:59,817 INFO L225 Difference]: With dead ends: 1583 [2021-05-21 21:21:59,817 INFO L226 Difference]: Without dead ends: 1535 [2021-05-21 21:21:59,817 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5681 ImplicationChecksByTransitivity, 3688.0ms TimeCoverageRelationStatistics Valid=965, Invalid=16591, Unknown=0, NotChecked=0, Total=17556 [2021-05-21 21:21:59,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1535 states. [2021-05-21 21:21:59,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1535 to 875. [2021-05-21 21:21:59,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 874 states have (on average 2.151029748283753) internal successors, (1880), 874 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:21:59,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 1880 transitions. [2021-05-21 21:21:59,825 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 1880 transitions. Word has length 49 [2021-05-21 21:21:59,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:21:59,826 INFO L482 AbstractCegarLoop]: Abstraction has 875 states and 1880 transitions. [2021-05-21 21:21:59,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 2.0) internal successors, (96), 47 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:21:59,826 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 1880 transitions. [2021-05-21 21:21:59,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-21 21:21:59,826 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:21:59,826 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:22:00,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-05-21 21:22:00,027 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:22:00,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:22:00,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1059402165, now seen corresponding path program 207 times [2021-05-21 21:22:00,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:22:00,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499416237] [2021-05-21 21:22:00,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:22:00,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:22:00,355 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 64 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:22:00,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:22:00,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499416237] [2021-05-21 21:22:00,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499416237] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:22:00,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916297557] [2021-05-21 21:22:00,355 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 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:22:00,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-05-21 21:22:00,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:22:00,386 WARN L261 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 81 conjunts are in the unsatisfiable core [2021-05-21 21:22:00,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:22:01,000 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:22:01,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916297557] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:22:01,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:22:01,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-05-21 21:22:01,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277539361] [2021-05-21 21:22:01,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-05-21 21:22:01,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:22:01,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-05-21 21:22:01,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=2263, Unknown=0, NotChecked=0, Total=2550 [2021-05-21 21:22:01,001 INFO L87 Difference]: Start difference. First operand 875 states and 1880 transitions. Second operand has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:04,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:22:04,069 INFO L93 Difference]: Finished difference Result 1900 states and 4012 transitions. [2021-05-21 21:22:04,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-05-21 21:22:04,070 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-05-21 21:22:04,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:22:04,071 INFO L225 Difference]: With dead ends: 1900 [2021-05-21 21:22:04,071 INFO L226 Difference]: Without dead ends: 1815 [2021-05-21 21:22:04,072 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4593 ImplicationChecksByTransitivity, 2942.1ms TimeCoverageRelationStatistics Valid=1932, Invalid=13568, Unknown=0, NotChecked=0, Total=15500 [2021-05-21 21:22:04,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1815 states. [2021-05-21 21:22:04,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1815 to 1155. [2021-05-21 21:22:04,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1155 states, 1154 states have (on average 2.2435008665511265) internal successors, (2589), 1154 states have internal predecessors, (2589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:04,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1155 states to 1155 states and 2589 transitions. [2021-05-21 21:22:04,083 INFO L78 Accepts]: Start accepts. Automaton has 1155 states and 2589 transitions. Word has length 51 [2021-05-21 21:22:04,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:22:04,083 INFO L482 AbstractCegarLoop]: Abstraction has 1155 states and 2589 transitions. [2021-05-21 21:22:04,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:04,083 INFO L276 IsEmpty]: Start isEmpty. Operand 1155 states and 2589 transitions. [2021-05-21 21:22:04,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-21 21:22:04,084 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:22:04,084 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:22:04,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable437 [2021-05-21 21:22:04,284 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:22:04,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:22:04,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1942809299, now seen corresponding path program 208 times [2021-05-21 21:22:04,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:22:04,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241478754] [2021-05-21 21:22:04,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:22:04,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:22:04,612 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 64 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:22:04,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:22:04,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241478754] [2021-05-21 21:22:04,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241478754] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:22:04,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622242507] [2021-05-21 21:22:04,612 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 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:22:04,637 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:22:04,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:22:04,638 WARN L261 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 81 conjunts are in the unsatisfiable core [2021-05-21 21:22:04,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:22:05,282 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:22:05,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622242507] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:22:05,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:22:05,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-05-21 21:22:05,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331455253] [2021-05-21 21:22:05,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-05-21 21:22:05,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:22:05,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-05-21 21:22:05,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=2275, Unknown=0, NotChecked=0, Total=2550 [2021-05-21 21:22:05,282 INFO L87 Difference]: Start difference. First operand 1155 states and 2589 transitions. Second operand has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:08,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:22:08,188 INFO L93 Difference]: Finished difference Result 1950 states and 4095 transitions. [2021-05-21 21:22:08,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-05-21 21:22:08,188 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-05-21 21:22:08,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:22:08,190 INFO L225 Difference]: With dead ends: 1950 [2021-05-21 21:22:08,190 INFO L226 Difference]: Without dead ends: 1876 [2021-05-21 21:22:08,191 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5054 ImplicationChecksByTransitivity, 3007.4ms TimeCoverageRelationStatistics Valid=2016, Invalid=14754, Unknown=0, NotChecked=0, Total=16770 [2021-05-21 21:22:08,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1876 states. [2021-05-21 21:22:08,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1876 to 1157. [2021-05-21 21:22:08,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1157 states, 1156 states have (on average 2.2430795847750864) internal successors, (2593), 1156 states have internal predecessors, (2593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:08,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1157 states to 1157 states and 2593 transitions. [2021-05-21 21:22:08,203 INFO L78 Accepts]: Start accepts. Automaton has 1157 states and 2593 transitions. Word has length 51 [2021-05-21 21:22:08,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:22:08,203 INFO L482 AbstractCegarLoop]: Abstraction has 1157 states and 2593 transitions. [2021-05-21 21:22:08,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:08,203 INFO L276 IsEmpty]: Start isEmpty. Operand 1157 states and 2593 transitions. [2021-05-21 21:22:08,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-21 21:22:08,204 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:22:08,204 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:22:08,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable438 [2021-05-21 21:22:08,404 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:22:08,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:22:08,404 INFO L82 PathProgramCache]: Analyzing trace with hash -539398377, now seen corresponding path program 209 times [2021-05-21 21:22:08,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:22:08,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753588811] [2021-05-21 21:22:08,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:22:08,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:22:08,729 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 64 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:22:08,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:22:08,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753588811] [2021-05-21 21:22:08,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753588811] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:22:08,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244333115] [2021-05-21 21:22:08,730 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 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:22:08,758 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-05-21 21:22:08,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:22:08,759 WARN L261 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 81 conjunts are in the unsatisfiable core [2021-05-21 21:22:08,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:22:09,414 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:22:09,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244333115] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:22:09,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:22:09,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-05-21 21:22:09,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758358414] [2021-05-21 21:22:09,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-05-21 21:22:09,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:22:09,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-05-21 21:22:09,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=2283, Unknown=0, NotChecked=0, Total=2550 [2021-05-21 21:22:09,415 INFO L87 Difference]: Start difference. First operand 1157 states and 2593 transitions. Second operand has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:12,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:22:12,673 INFO L93 Difference]: Finished difference Result 1948 states and 4093 transitions. [2021-05-21 21:22:12,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-05-21 21:22:12,674 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-05-21 21:22:12,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:22:12,675 INFO L225 Difference]: With dead ends: 1948 [2021-05-21 21:22:12,675 INFO L226 Difference]: Without dead ends: 1880 [2021-05-21 21:22:12,676 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5509 ImplicationChecksByTransitivity, 3188.5ms TimeCoverageRelationStatistics Valid=2113, Invalid=15977, Unknown=0, NotChecked=0, Total=18090 [2021-05-21 21:22:12,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1880 states. [2021-05-21 21:22:12,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1880 to 1159. [2021-05-21 21:22:12,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1159 states, 1158 states have (on average 2.2426597582037995) internal successors, (2597), 1158 states have internal predecessors, (2597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:12,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1159 states to 1159 states and 2597 transitions. [2021-05-21 21:22:12,688 INFO L78 Accepts]: Start accepts. Automaton has 1159 states and 2597 transitions. Word has length 51 [2021-05-21 21:22:12,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:22:12,688 INFO L482 AbstractCegarLoop]: Abstraction has 1159 states and 2597 transitions. [2021-05-21 21:22:12,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:12,688 INFO L276 IsEmpty]: Start isEmpty. Operand 1159 states and 2597 transitions. [2021-05-21 21:22:12,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-21 21:22:12,689 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:22:12,689 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:22:12,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable439,210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:22:12,889 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:22:12,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:22:12,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1929524315, now seen corresponding path program 210 times [2021-05-21 21:22:12,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:22:12,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929298137] [2021-05-21 21:22:12,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:22:12,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:22:13,241 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 64 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:22:13,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:22:13,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929298137] [2021-05-21 21:22:13,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929298137] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:22:13,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859916659] [2021-05-21 21:22:13,242 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:22:13,270 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-05-21 21:22:13,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:22:13,271 WARN L261 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 79 conjunts are in the unsatisfiable core [2021-05-21 21:22:13,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:22:13,958 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:22:13,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859916659] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:22:13,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:22:13,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-05-21 21:22:13,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673582839] [2021-05-21 21:22:13,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-05-21 21:22:13,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:22:13,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-05-21 21:22:13,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=2290, Unknown=0, NotChecked=0, Total=2550 [2021-05-21 21:22:13,959 INFO L87 Difference]: Start difference. First operand 1159 states and 2597 transitions. Second operand has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:17,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:22:17,574 INFO L93 Difference]: Finished difference Result 1946 states and 4091 transitions. [2021-05-21 21:22:17,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-05-21 21:22:17,574 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-05-21 21:22:17,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:22:17,576 INFO L225 Difference]: With dead ends: 1946 [2021-05-21 21:22:17,576 INFO L226 Difference]: Without dead ends: 1884 [2021-05-21 21:22:17,577 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5869 ImplicationChecksByTransitivity, 3469.6ms TimeCoverageRelationStatistics Valid=2235, Invalid=17225, Unknown=0, NotChecked=0, Total=19460 [2021-05-21 21:22:17,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1884 states. [2021-05-21 21:22:17,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1884 to 1161. [2021-05-21 21:22:17,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1161 states, 1160 states have (on average 2.242241379310345) internal successors, (2601), 1160 states have internal predecessors, (2601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:17,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1161 states to 1161 states and 2601 transitions. [2021-05-21 21:22:17,588 INFO L78 Accepts]: Start accepts. Automaton has 1161 states and 2601 transitions. Word has length 51 [2021-05-21 21:22:17,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:22:17,588 INFO L482 AbstractCegarLoop]: Abstraction has 1161 states and 2601 transitions. [2021-05-21 21:22:17,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:17,588 INFO L276 IsEmpty]: Start isEmpty. Operand 1161 states and 2601 transitions. [2021-05-21 21:22:17,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-21 21:22:17,589 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:22:17,589 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:22:17,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:22:17,789 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:22:17,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:22:17,790 INFO L82 PathProgramCache]: Analyzing trace with hash 425949855, now seen corresponding path program 211 times [2021-05-21 21:22:17,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:22:17,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781458895] [2021-05-21 21:22:17,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:22:17,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:22:18,135 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 64 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:22:18,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:22:18,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781458895] [2021-05-21 21:22:18,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781458895] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:22:18,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034721252] [2021-05-21 21:22:18,136 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 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:22:18,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:22:18,162 WARN L261 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 81 conjunts are in the unsatisfiable core [2021-05-21 21:22:18,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:22:18,810 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:22:18,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034721252] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:22:18,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:22:18,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-05-21 21:22:18,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685145895] [2021-05-21 21:22:18,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-05-21 21:22:18,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:22:18,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-05-21 21:22:18,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=2285, Unknown=0, NotChecked=0, Total=2550 [2021-05-21 21:22:18,811 INFO L87 Difference]: Start difference. First operand 1161 states and 2601 transitions. Second operand has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:22,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:22:22,737 INFO L93 Difference]: Finished difference Result 1944 states and 4089 transitions. [2021-05-21 21:22:22,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-05-21 21:22:22,737 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-05-21 21:22:22,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:22:22,738 INFO L225 Difference]: With dead ends: 1944 [2021-05-21 21:22:22,739 INFO L226 Difference]: Without dead ends: 1888 [2021-05-21 21:22:22,740 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6469 ImplicationChecksByTransitivity, 3437.0ms TimeCoverageRelationStatistics Valid=2387, Invalid=18493, Unknown=0, NotChecked=0, Total=20880 [2021-05-21 21:22:22,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1888 states. [2021-05-21 21:22:22,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1888 to 1163. [2021-05-21 21:22:22,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1163 states, 1162 states have (on average 2.2418244406196215) internal successors, (2605), 1162 states have internal predecessors, (2605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:22,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1163 states to 1163 states and 2605 transitions. [2021-05-21 21:22:22,751 INFO L78 Accepts]: Start accepts. Automaton has 1163 states and 2605 transitions. Word has length 51 [2021-05-21 21:22:22,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:22:22,751 INFO L482 AbstractCegarLoop]: Abstraction has 1163 states and 2605 transitions. [2021-05-21 21:22:22,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:22,751 INFO L276 IsEmpty]: Start isEmpty. Operand 1163 states and 2605 transitions. [2021-05-21 21:22:22,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-21 21:22:22,752 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:22:22,752 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:22:22,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable446 [2021-05-21 21:22:22,952 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:22:22,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:22:22,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1725333021, now seen corresponding path program 212 times [2021-05-21 21:22:22,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:22:22,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907326688] [2021-05-21 21:22:22,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:22:22,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:22:23,301 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 64 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:22:23,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:22:23,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907326688] [2021-05-21 21:22:23,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907326688] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:22:23,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609864142] [2021-05-21 21:22:23,301 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 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:22:23,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:22:23,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:22:23,329 WARN L261 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 81 conjunts are in the unsatisfiable core [2021-05-21 21:22:23,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:22:23,970 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:22:23,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609864142] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:22:23,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:22:23,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-05-21 21:22:23,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349088997] [2021-05-21 21:22:23,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-05-21 21:22:23,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:22:23,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-05-21 21:22:23,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=2281, Unknown=0, NotChecked=0, Total=2550 [2021-05-21 21:22:23,971 INFO L87 Difference]: Start difference. First operand 1163 states and 2605 transitions. Second operand has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:27,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:22:27,742 INFO L93 Difference]: Finished difference Result 1942 states and 4087 transitions. [2021-05-21 21:22:27,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-05-21 21:22:27,742 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-05-21 21:22:27,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:22:27,743 INFO L225 Difference]: With dead ends: 1942 [2021-05-21 21:22:27,743 INFO L226 Difference]: Without dead ends: 1892 [2021-05-21 21:22:27,745 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6976 ImplicationChecksByTransitivity, 3567.9ms TimeCoverageRelationStatistics Valid=2559, Invalid=19791, Unknown=0, NotChecked=0, Total=22350 [2021-05-21 21:22:27,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1892 states. [2021-05-21 21:22:27,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1892 to 1165. [2021-05-21 21:22:27,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1165 states, 1164 states have (on average 2.241408934707904) internal successors, (2609), 1164 states have internal predecessors, (2609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:27,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1165 states to 1165 states and 2609 transitions. [2021-05-21 21:22:27,756 INFO L78 Accepts]: Start accepts. Automaton has 1165 states and 2609 transitions. Word has length 51 [2021-05-21 21:22:27,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:22:27,756 INFO L482 AbstractCegarLoop]: Abstraction has 1165 states and 2609 transitions. [2021-05-21 21:22:27,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:27,756 INFO L276 IsEmpty]: Start isEmpty. Operand 1165 states and 2609 transitions. [2021-05-21 21:22:27,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-21 21:22:27,757 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:22:27,757 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:22:27,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable447,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:22:27,957 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:22:27,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:22:27,957 INFO L82 PathProgramCache]: Analyzing trace with hash -695170521, now seen corresponding path program 213 times [2021-05-21 21:22:27,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:22:27,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886115007] [2021-05-21 21:22:27,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:22:27,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:22:28,308 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 64 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:22:28,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:22:28,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886115007] [2021-05-21 21:22:28,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886115007] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:22:28,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915497464] [2021-05-21 21:22:28,308 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 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:22:28,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-05-21 21:22:28,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:22:28,342 WARN L261 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 81 conjunts are in the unsatisfiable core [2021-05-21 21:22:28,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:22:28,968 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:22:28,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915497464] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:22:28,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:22:28,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-05-21 21:22:28,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975934132] [2021-05-21 21:22:28,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-05-21 21:22:28,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:22:28,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-05-21 21:22:28,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=2273, Unknown=0, NotChecked=0, Total=2550 [2021-05-21 21:22:28,969 INFO L87 Difference]: Start difference. First operand 1165 states and 2609 transitions. Second operand has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:33,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:22:33,081 INFO L93 Difference]: Finished difference Result 1940 states and 4085 transitions. [2021-05-21 21:22:33,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2021-05-21 21:22:33,082 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-05-21 21:22:33,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:22:33,083 INFO L225 Difference]: With dead ends: 1940 [2021-05-21 21:22:33,083 INFO L226 Difference]: Without dead ends: 1896 [2021-05-21 21:22:33,085 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7501 ImplicationChecksByTransitivity, 3676.6ms TimeCoverageRelationStatistics Valid=2756, Invalid=21114, Unknown=0, NotChecked=0, Total=23870 [2021-05-21 21:22:33,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1896 states. [2021-05-21 21:22:33,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1896 to 1167. [2021-05-21 21:22:33,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1167 states, 1166 states have (on average 2.2409948542024014) internal successors, (2613), 1166 states have internal predecessors, (2613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:33,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1167 states to 1167 states and 2613 transitions. [2021-05-21 21:22:33,096 INFO L78 Accepts]: Start accepts. Automaton has 1167 states and 2613 transitions. Word has length 51 [2021-05-21 21:22:33,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:22:33,096 INFO L482 AbstractCegarLoop]: Abstraction has 1167 states and 2613 transitions. [2021-05-21 21:22:33,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:33,096 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states and 2613 transitions. [2021-05-21 21:22:33,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-21 21:22:33,097 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:22:33,097 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:22:33,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable448 [2021-05-21 21:22:33,297 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:22:33,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:22:33,297 INFO L82 PathProgramCache]: Analyzing trace with hash 400872299, now seen corresponding path program 214 times [2021-05-21 21:22:33,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:22:33,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846523188] [2021-05-21 21:22:33,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:22:33,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:22:33,651 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 64 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:22:33,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:22:33,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846523188] [2021-05-21 21:22:33,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846523188] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:22:33,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002589586] [2021-05-21 21:22:33,651 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 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:22:33,677 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:22:33,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:22:33,678 WARN L261 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 81 conjunts are in the unsatisfiable core [2021-05-21 21:22:33,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:22:34,304 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:22:34,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002589586] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:22:34,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:22:34,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-05-21 21:22:34,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240396108] [2021-05-21 21:22:34,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-05-21 21:22:34,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:22:34,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-05-21 21:22:34,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=2261, Unknown=0, NotChecked=0, Total=2550 [2021-05-21 21:22:34,305 INFO L87 Difference]: Start difference. First operand 1167 states and 2613 transitions. Second operand has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:38,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:22:38,535 INFO L93 Difference]: Finished difference Result 1940 states and 4087 transitions. [2021-05-21 21:22:38,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2021-05-21 21:22:38,535 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-05-21 21:22:38,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:22:38,536 INFO L225 Difference]: With dead ends: 1940 [2021-05-21 21:22:38,536 INFO L226 Difference]: Without dead ends: 1902 [2021-05-21 21:22:38,538 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8042 ImplicationChecksByTransitivity, 3859.6ms TimeCoverageRelationStatistics Valid=2978, Invalid=22462, Unknown=0, NotChecked=0, Total=25440 [2021-05-21 21:22:38,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1902 states. [2021-05-21 21:22:38,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1902 to 1169. [2021-05-21 21:22:38,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1169 states, 1168 states have (on average 2.2405821917808217) internal successors, (2617), 1168 states have internal predecessors, (2617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:38,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1169 states to 1169 states and 2617 transitions. [2021-05-21 21:22:38,549 INFO L78 Accepts]: Start accepts. Automaton has 1169 states and 2617 transitions. Word has length 51 [2021-05-21 21:22:38,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:22:38,549 INFO L482 AbstractCegarLoop]: Abstraction has 1169 states and 2617 transitions. [2021-05-21 21:22:38,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:38,549 INFO L276 IsEmpty]: Start isEmpty. Operand 1169 states and 2617 transitions. [2021-05-21 21:22:38,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-21 21:22:38,550 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:22:38,550 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:22:38,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable449,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:22:38,750 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:22:38,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:22:38,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1233296815, now seen corresponding path program 215 times [2021-05-21 21:22:38,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:22:38,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752679065] [2021-05-21 21:22:38,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:22:38,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:22:39,146 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 64 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:22:39,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:22:39,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752679065] [2021-05-21 21:22:39,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752679065] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:22:39,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512359964] [2021-05-21 21:22:39,146 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 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:22:39,175 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-05-21 21:22:39,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:22:39,176 WARN L261 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 81 conjunts are in the unsatisfiable core [2021-05-21 21:22:39,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:22:39,795 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:22:39,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512359964] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:22:39,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:22:39,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-05-21 21:22:39,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244195308] [2021-05-21 21:22:39,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-05-21 21:22:39,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:22:39,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-05-21 21:22:39,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=2242, Unknown=0, NotChecked=0, Total=2550 [2021-05-21 21:22:39,796 INFO L87 Difference]: Start difference. First operand 1169 states and 2617 transitions. Second operand has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:44,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:22:44,584 INFO L93 Difference]: Finished difference Result 2015 states and 4220 transitions. [2021-05-21 21:22:44,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2021-05-21 21:22:44,584 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-05-21 21:22:44,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:22:44,586 INFO L225 Difference]: With dead ends: 2015 [2021-05-21 21:22:44,586 INFO L226 Difference]: Without dead ends: 1970 [2021-05-21 21:22:44,587 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8420 ImplicationChecksByTransitivity, 4269.6ms TimeCoverageRelationStatistics Valid=3200, Invalid=23532, Unknown=0, NotChecked=0, Total=26732 [2021-05-21 21:22:44,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1970 states. [2021-05-21 21:22:44,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1970 to 1172. [2021-05-21 21:22:44,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1172 states, 1171 states have (on average 2.241673783091375) internal successors, (2625), 1171 states have internal predecessors, (2625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:44,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1172 states to 1172 states and 2625 transitions. [2021-05-21 21:22:44,597 INFO L78 Accepts]: Start accepts. Automaton has 1172 states and 2625 transitions. Word has length 51 [2021-05-21 21:22:44,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:22:44,598 INFO L482 AbstractCegarLoop]: Abstraction has 1172 states and 2625 transitions. [2021-05-21 21:22:44,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:44,598 INFO L276 IsEmpty]: Start isEmpty. Operand 1172 states and 2625 transitions. [2021-05-21 21:22:44,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-21 21:22:44,598 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:22:44,598 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:22:44,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable450,216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:22:44,799 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:22:44,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:22:44,799 INFO L82 PathProgramCache]: Analyzing trace with hash -31631045, now seen corresponding path program 216 times [2021-05-21 21:22:44,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:22:44,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429577980] [2021-05-21 21:22:44,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:22:44,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:22:45,189 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 64 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:22:45,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:22:45,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429577980] [2021-05-21 21:22:45,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429577980] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:22:45,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483194993] [2021-05-21 21:22:45,190 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 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:22:45,219 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-05-21 21:22:45,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:22:45,220 WARN L261 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 75 conjunts are in the unsatisfiable core [2021-05-21 21:22:45,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:22:46,024 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:22:46,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483194993] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:22:46,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:22:46,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-05-21 21:22:46,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965003423] [2021-05-21 21:22:46,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-05-21 21:22:46,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:22:46,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-05-21 21:22:46,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=2266, Unknown=0, NotChecked=0, Total=2550 [2021-05-21 21:22:46,025 INFO L87 Difference]: Start difference. First operand 1172 states and 2625 transitions. Second operand has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:50,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:22:50,765 INFO L93 Difference]: Finished difference Result 1657 states and 3473 transitions. [2021-05-21 21:22:50,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-05-21 21:22:50,765 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-05-21 21:22:50,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:22:50,766 INFO L225 Difference]: With dead ends: 1657 [2021-05-21 21:22:50,766 INFO L226 Difference]: Without dead ends: 1637 [2021-05-21 21:22:50,767 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6634 ImplicationChecksByTransitivity, 4386.9ms TimeCoverageRelationStatistics Valid=2918, Invalid=19732, Unknown=0, NotChecked=0, Total=22650 [2021-05-21 21:22:50,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2021-05-21 21:22:50,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1173. [2021-05-21 21:22:50,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1173 states, 1172 states have (on average 2.241467576791809) internal successors, (2627), 1172 states have internal predecessors, (2627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:50,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1173 states to 1173 states and 2627 transitions. [2021-05-21 21:22:50,777 INFO L78 Accepts]: Start accepts. Automaton has 1173 states and 2627 transitions. Word has length 51 [2021-05-21 21:22:50,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:22:50,778 INFO L482 AbstractCegarLoop]: Abstraction has 1173 states and 2627 transitions. [2021-05-21 21:22:50,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:50,778 INFO L276 IsEmpty]: Start isEmpty. Operand 1173 states and 2627 transitions. [2021-05-21 21:22:50,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-21 21:22:50,778 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:22:50,778 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:22:50,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable451,217 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:22:50,979 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:22:50,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:22:50,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1870003939, now seen corresponding path program 217 times [2021-05-21 21:22:50,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:22:50,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195717524] [2021-05-21 21:22:50,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:22:50,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:22:51,298 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 64 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:22:51,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:22:51,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195717524] [2021-05-21 21:22:51,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195717524] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:22:51,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194197428] [2021-05-21 21:22:51,298 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 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:22:51,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:22:51,326 WARN L261 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 81 conjunts are in the unsatisfiable core [2021-05-21 21:22:51,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:22:51,957 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:22:51,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194197428] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:22:51,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:22:51,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-05-21 21:22:51,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643543027] [2021-05-21 21:22:51,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-05-21 21:22:51,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:22:51,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-05-21 21:22:51,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=2268, Unknown=0, NotChecked=0, Total=2550 [2021-05-21 21:22:51,958 INFO L87 Difference]: Start difference. First operand 1173 states and 2627 transitions. Second operand has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:55,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:22:55,195 INFO L93 Difference]: Finished difference Result 1919 states and 4029 transitions. [2021-05-21 21:22:55,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-05-21 21:22:55,195 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-05-21 21:22:55,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:22:55,196 INFO L225 Difference]: With dead ends: 1919 [2021-05-21 21:22:55,197 INFO L226 Difference]: Without dead ends: 1851 [2021-05-21 21:22:55,197 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5122 ImplicationChecksByTransitivity, 2923.0ms TimeCoverageRelationStatistics Valid=1897, Invalid=14873, Unknown=0, NotChecked=0, Total=16770 [2021-05-21 21:22:55,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1851 states. [2021-05-21 21:22:55,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1851 to 1179. [2021-05-21 21:22:55,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1179 states, 1178 states have (on average 2.2402376910016977) internal successors, (2639), 1178 states have internal predecessors, (2639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:55,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1179 states to 1179 states and 2639 transitions. [2021-05-21 21:22:55,208 INFO L78 Accepts]: Start accepts. Automaton has 1179 states and 2639 transitions. Word has length 51 [2021-05-21 21:22:55,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:22:55,208 INFO L482 AbstractCegarLoop]: Abstraction has 1179 states and 2639 transitions. [2021-05-21 21:22:55,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:55,208 INFO L276 IsEmpty]: Start isEmpty. Operand 1179 states and 2639 transitions. [2021-05-21 21:22:55,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-21 21:22:55,209 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:22:55,209 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:22:55,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable469,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:22:55,409 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:22:55,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:22:55,410 INFO L82 PathProgramCache]: Analyzing trace with hash 598918753, now seen corresponding path program 218 times [2021-05-21 21:22:55,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:22:55,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308744365] [2021-05-21 21:22:55,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:22:55,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:22:55,755 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 64 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:22:55,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:22:55,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308744365] [2021-05-21 21:22:55,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308744365] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:22:55,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401551511] [2021-05-21 21:22:55,756 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 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:22:55,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:22:55,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:22:55,783 WARN L261 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 81 conjunts are in the unsatisfiable core [2021-05-21 21:22:55,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:22:56,409 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:22:56,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401551511] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:22:56,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:22:56,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-05-21 21:22:56,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95799809] [2021-05-21 21:22:56,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-05-21 21:22:56,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:22:56,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-05-21 21:22:56,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=2270, Unknown=0, NotChecked=0, Total=2550 [2021-05-21 21:22:56,410 INFO L87 Difference]: Start difference. First operand 1179 states and 2639 transitions. Second operand has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:59,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:22:59,658 INFO L93 Difference]: Finished difference Result 1942 states and 4098 transitions. [2021-05-21 21:22:59,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-05-21 21:22:59,658 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-05-21 21:22:59,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:22:59,659 INFO L225 Difference]: With dead ends: 1942 [2021-05-21 21:22:59,659 INFO L226 Difference]: Without dead ends: 1880 [2021-05-21 21:22:59,660 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5566 ImplicationChecksByTransitivity, 3114.1ms TimeCoverageRelationStatistics Valid=2033, Invalid=16057, Unknown=0, NotChecked=0, Total=18090 [2021-05-21 21:22:59,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1880 states. [2021-05-21 21:22:59,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1880 to 1197. [2021-05-21 21:22:59,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1197 states, 1196 states have (on average 2.25) internal successors, (2691), 1196 states have internal predecessors, (2691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:59,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1197 states to 1197 states and 2691 transitions. [2021-05-21 21:22:59,671 INFO L78 Accepts]: Start accepts. Automaton has 1197 states and 2691 transitions. Word has length 51 [2021-05-21 21:22:59,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:22:59,671 INFO L482 AbstractCegarLoop]: Abstraction has 1197 states and 2691 transitions. [2021-05-21 21:22:59,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:22:59,671 INFO L276 IsEmpty]: Start isEmpty. Operand 1197 states and 2691 transitions. [2021-05-21 21:22:59,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-21 21:22:59,672 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:22:59,672 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:22:59,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable470,219 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:22:59,872 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:22:59,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:22:59,873 INFO L82 PathProgramCache]: Analyzing trace with hash -904655707, now seen corresponding path program 219 times [2021-05-21 21:22:59,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:22:59,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273711875] [2021-05-21 21:22:59,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:22:59,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:23:00,218 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 64 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:23:00,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:23:00,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273711875] [2021-05-21 21:23:00,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273711875] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:00,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826765037] [2021-05-21 21:23:00,219 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 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:23:00,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-05-21 21:23:00,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:23:00,252 WARN L261 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 81 conjunts are in the unsatisfiable core [2021-05-21 21:23:00,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:23:00,879 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:23:00,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826765037] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:00,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:23:00,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-05-21 21:23:00,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154716978] [2021-05-21 21:23:00,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-05-21 21:23:00,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:23:00,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-05-21 21:23:00,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=2270, Unknown=0, NotChecked=0, Total=2550 [2021-05-21 21:23:00,880 INFO L87 Difference]: Start difference. First operand 1197 states and 2691 transitions. Second operand has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:04,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:23:04,541 INFO L93 Difference]: Finished difference Result 1962 states and 4156 transitions. [2021-05-21 21:23:04,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-05-21 21:23:04,541 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-05-21 21:23:04,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:23:04,543 INFO L225 Difference]: With dead ends: 1962 [2021-05-21 21:23:04,543 INFO L226 Difference]: Without dead ends: 1906 [2021-05-21 21:23:04,543 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6027 ImplicationChecksByTransitivity, 3261.2ms TimeCoverageRelationStatistics Valid=2180, Invalid=17280, Unknown=0, NotChecked=0, Total=19460 [2021-05-21 21:23:04,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1906 states. [2021-05-21 21:23:04,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1906 to 1211. [2021-05-21 21:23:04,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1211 states, 1210 states have (on average 2.2570247933884295) internal successors, (2731), 1210 states have internal predecessors, (2731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:04,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1211 states to 1211 states and 2731 transitions. [2021-05-21 21:23:04,555 INFO L78 Accepts]: Start accepts. Automaton has 1211 states and 2731 transitions. Word has length 51 [2021-05-21 21:23:04,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:23:04,555 INFO L482 AbstractCegarLoop]: Abstraction has 1211 states and 2731 transitions. [2021-05-21 21:23:04,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:04,555 INFO L276 IsEmpty]: Start isEmpty. Operand 1211 states and 2731 transitions. [2021-05-21 21:23:04,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-21 21:23:04,556 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:23:04,556 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:23:04,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable471,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:23:04,756 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:23:04,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:23:04,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1239028713, now seen corresponding path program 220 times [2021-05-21 21:23:04,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:23:04,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091489661] [2021-05-21 21:23:04,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:23:04,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:23:05,124 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 64 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:23:05,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:23:05,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091489661] [2021-05-21 21:23:05,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091489661] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:05,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188978876] [2021-05-21 21:23:05,125 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 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:23:05,161 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:23:05,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:23:05,162 WARN L261 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 81 conjunts are in the unsatisfiable core [2021-05-21 21:23:05,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:23:05,793 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:23:05,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188978876] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:05,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:23:05,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-05-21 21:23:05,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239907999] [2021-05-21 21:23:05,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-05-21 21:23:05,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:23:05,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-05-21 21:23:05,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=2266, Unknown=0, NotChecked=0, Total=2550 [2021-05-21 21:23:05,794 INFO L87 Difference]: Start difference. First operand 1211 states and 2731 transitions. Second operand has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:09,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:23:09,712 INFO L93 Difference]: Finished difference Result 1978 states and 4206 transitions. [2021-05-21 21:23:09,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-05-21 21:23:09,712 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-05-21 21:23:09,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:23:09,714 INFO L225 Difference]: With dead ends: 1978 [2021-05-21 21:23:09,714 INFO L226 Difference]: Without dead ends: 1928 [2021-05-21 21:23:09,714 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6505 ImplicationChecksByTransitivity, 3415.5ms TimeCoverageRelationStatistics Valid=2352, Invalid=18528, Unknown=0, NotChecked=0, Total=20880 [2021-05-21 21:23:09,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1928 states. [2021-05-21 21:23:09,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1928 to 1225. [2021-05-21 21:23:09,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1225 states, 1224 states have (on average 2.263888888888889) internal successors, (2771), 1224 states have internal predecessors, (2771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:09,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1225 states to 1225 states and 2771 transitions. [2021-05-21 21:23:09,726 INFO L78 Accepts]: Start accepts. Automaton has 1225 states and 2771 transitions. Word has length 51 [2021-05-21 21:23:09,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:23:09,726 INFO L482 AbstractCegarLoop]: Abstraction has 1225 states and 2771 transitions. [2021-05-21 21:23:09,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:23:09,726 INFO L276 IsEmpty]: Start isEmpty. Operand 1225 states and 2771 transitions. [2021-05-21 21:23:09,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-21 21:23:09,727 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:23:09,727 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:23:09,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:23:09,928 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:23:09,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:23:09,928 INFO L82 PathProgramCache]: Analyzing trace with hash -2025776083, now seen corresponding path program 221 times [2021-05-21 21:23:09,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:23:09,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49717619] [2021-05-21 21:23:09,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:23:09,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:23:10,283 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 64 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:23:10,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:23:10,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49717619] [2021-05-21 21:23:10,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49717619] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:10,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606487790] [2021-05-21 21:23:10,283 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 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:23:10,312 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-05-21 21:23:10,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:23:10,313 WARN L261 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 81 conjunts are in the unsatisfiable core [2021-05-21 21:23:10,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:23:10,945 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:23:10,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606487790] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:23:10,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:23:10,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-05-21 21:23:10,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670674853] [2021-05-21 21:23:10,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-05-21 21:23:10,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:23:10,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-05-21 21:23:10,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=2258, Unknown=0, NotChecked=0, Total=2550 [2021-05-21 21:23:10,946 INFO L87 Difference]: Start difference. First operand 1225 states and 2771 transitions. Second operand has 51 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 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... [2021-05-21 21:23:11,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-21 21:23:11,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable473,222 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:23:11,760 WARN L547 AbstractCegarLoop]: Verification canceled [2021-05-21 21:23:11,761 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-05-21 21:23:11,763 WARN L196 ceAbstractionStarter]: Timeout [2021-05-21 21:23:11,763 INFO L202 PluginConnector]: Adding new model nonblocking-cntr-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.05 09:23:11 BasicIcfg [2021-05-21 21:23:11,763 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-21 21:23:11,763 INFO L168 Benchmark]: Toolchain (without parser) took 771660.38 ms. Allocated memory was 356.5 MB in the beginning and 1.1 GB in the end (delta: 742.4 MB). Free memory was 336.5 MB in the beginning and 495.8 MB in the end (delta: -159.2 MB). Peak memory consumption was 584.6 MB. Max. memory is 16.0 GB. [2021-05-21 21:23:11,763 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 356.5 MB. Free memory was 337.6 MB in the beginning and 337.6 MB in the end (delta: 76.2 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-21 21:23:11,763 INFO L168 Benchmark]: Boogie Procedure Inliner took 16.72 ms. Allocated memory is still 356.5 MB. Free memory was 336.5 MB in the beginning and 335.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-21 21:23:11,764 INFO L168 Benchmark]: Boogie Preprocessor took 11.58 ms. Allocated memory is still 356.5 MB. Free memory was 335.0 MB in the beginning and 334.1 MB in the end (delta: 923.8 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-21 21:23:11,764 INFO L168 Benchmark]: RCFGBuilder took 199.76 ms. Allocated memory is still 356.5 MB. Free memory was 334.0 MB in the beginning and 322.7 MB in the end (delta: 11.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-05-21 21:23:11,764 INFO L168 Benchmark]: TraceAbstraction took 771422.89 ms. Allocated memory was 356.5 MB in the beginning and 1.1 GB in the end (delta: 742.4 MB). Free memory was 322.2 MB in the beginning and 495.8 MB in the end (delta: -173.5 MB). Peak memory consumption was 569.9 MB. Max. memory is 16.0 GB. [2021-05-21 21:23:11,764 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 356.5 MB. Free memory was 337.6 MB in the beginning and 337.6 MB in the end (delta: 76.2 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 16.72 ms. Allocated memory is still 356.5 MB. Free memory was 336.5 MB in the beginning and 335.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 11.58 ms. Allocated memory is still 356.5 MB. Free memory was 335.0 MB in the beginning and 334.1 MB in the end (delta: 923.8 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 199.76 ms. Allocated memory is still 356.5 MB. Free memory was 334.0 MB in the beginning and 322.7 MB in the end (delta: 11.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 771422.89 ms. Allocated memory was 356.5 MB in the beginning and 1.1 GB in the end (delta: 742.4 MB). Free memory was 322.2 MB in the beginning and 495.8 MB in the end (delta: -173.5 MB). Peak memory consumption was 569.9 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 50]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (1225states) and FLOYD_HOARE automaton (currently 30 states, 51 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 66 known predicates. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 32 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 771372.0ms, OverallIterations: 223, TraceHistogramMax: 9, EmptinessCheckTime: 124.8ms, AutomataDifference: 574553.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 12.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 10407 SDtfs, 63747 SDslu, 178078 SDs, 0 SdLazy, 409514 SolverSat, 18239 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 125257.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 26270 GetRequests, 4405 SyntacticMatches, 266 SemanticMatches, 21598 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 885527 ImplicationChecksByTransitivity, 535162.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1225occurred in iteration=222, InterpolantAutomatonStates: 17463, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1272.0ms AutomataMinimizationTime, 222 MinimizatonAttempts, 79611 StatesRemovedByMinimization, 222 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 590.7ms SsaConstructionTime, 2746.0ms SatisfiabilityAnalysisTime, 142994.5ms InterpolantComputationTime, 16398 NumberOfCodeBlocks, 16398 NumberOfCodeBlocksAsserted, 1129 NumberOfCheckSat, 15954 ConstructedInterpolants, 0 QuantifiedInterpolants, 237581 SizeOfPredicates, 1075 NumberOfNonLiveVariables, 18358 ConjunctsInSsa, 11396 ConjunctsInUnsatCore, 444 InterpolantComputations, 2 PerfectInterpolantSequences, 4799/31805 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