/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.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d47b94137d5c7dd60722882962a90fb345e61909-d47b941 [2021-05-03 15:36:34,733 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-03 15:36:34,734 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-03 15:36:34,753 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-03 15:36:34,753 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-03 15:36:34,754 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-03 15:36:34,755 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-03 15:36:34,756 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-03 15:36:34,757 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-03 15:36:34,758 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-03 15:36:34,758 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-03 15:36:34,759 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-03 15:36:34,759 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-03 15:36:34,760 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-03 15:36:34,761 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-03 15:36:34,761 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-03 15:36:34,762 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-03 15:36:34,762 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-03 15:36:34,763 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-03 15:36:34,764 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-03 15:36:34,765 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-03 15:36:34,766 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-03 15:36:34,767 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-03 15:36:34,767 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-03 15:36:34,769 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-03 15:36:34,769 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-03 15:36:34,769 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-03 15:36:34,770 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-03 15:36:34,770 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-03 15:36:34,771 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-03 15:36:34,771 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-03 15:36:34,772 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-03 15:36:34,772 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-03 15:36:34,773 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-03 15:36:34,773 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-03 15:36:34,774 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-03 15:36:34,774 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-03 15:36:34,775 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-03 15:36:34,775 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-03 15:36:34,775 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-03 15:36:34,776 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-03 15:36:34,777 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-05-03 15:36:34,794 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-03 15:36:34,794 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-03 15:36:34,794 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-03 15:36:34,794 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-03 15:36:34,796 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-03 15:36:34,796 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-03 15:36:34,796 INFO L138 SettingsManager]: * Use SBE=true [2021-05-03 15:36:34,796 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-03 15:36:34,796 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-03 15:36:34,797 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-03 15:36:34,797 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-03 15:36:34,802 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-03 15:36:34,803 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-03 15:36:34,803 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-03 15:36:34,803 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-03 15:36:34,804 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-03 15:36:34,804 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-03 15:36:34,804 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-03 15:36:34,804 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-03 15:36:34,805 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-03 15:36:34,805 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-03 15:36:34,805 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-03 15:36:34,805 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-03 15:36:34,805 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 15:36:34,806 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-03 15:36:34,806 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-03 15:36:34,806 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-03 15:36:34,806 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-03 15:36:34,806 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-03 15:36:34,807 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-03 15:36:34,807 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-03 15:36:34,807 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-03 15:36:35,203 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-03 15:36:35,238 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-03 15:36:35,242 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-03 15:36:35,244 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-03 15:36:35,247 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-03 15:36:35,248 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/nonblocking-cntr.wvr.bpl [2021-05-03 15:36:35,249 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/nonblocking-cntr.wvr.bpl' [2021-05-03 15:36:35,294 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-03 15:36:35,297 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-03 15:36:35,300 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-03 15:36:35,300 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-03 15:36:35,301 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-03 15:36:35,317 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:36:35" (1/1) ... [2021-05-03 15:36:35,325 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:36:35" (1/1) ... [2021-05-03 15:36:35,336 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-03 15:36:35,339 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-03 15:36:35,339 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-03 15:36:35,340 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-03 15:36:35,347 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:36:35" (1/1) ... [2021-05-03 15:36:35,347 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:36:35" (1/1) ... [2021-05-03 15:36:35,348 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:36:35" (1/1) ... [2021-05-03 15:36:35,348 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:36:35" (1/1) ... [2021-05-03 15:36:35,352 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:36:35" (1/1) ... [2021-05-03 15:36:35,357 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:36:35" (1/1) ... [2021-05-03 15:36:35,359 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:36:35" (1/1) ... [2021-05-03 15:36:35,360 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-03 15:36:35,362 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-03 15:36:35,363 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-03 15:36:35,363 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-03 15:36:35,366 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:36:35" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 15:36:35,509 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-03 15:36:35,510 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-03 15:36:35,510 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-03 15:36:35,511 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-03 15:36:35,511 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-03 15:36:35,511 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-03 15:36:35,511 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-03 15:36:35,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-03 15:36:35,511 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-03 15:36:35,513 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-03 15:36:35,771 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-03 15:36:35,772 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-03 15:36:35,773 INFO L202 PluginConnector]: Adding new model nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 03:36:35 BoogieIcfgContainer [2021-05-03 15:36:35,774 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-03 15:36:35,775 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-03 15:36:35,775 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-03 15:36:35,778 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-03 15:36:35,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:36:35" (1/2) ... [2021-05-03 15:36:35,780 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77ce5a79 and model type nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 03:36:35, skipping insertion in model container [2021-05-03 15:36:35,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 03:36:35" (2/2) ... [2021-05-03 15:36:35,782 INFO L111 eAbstractionObserver]: Analyzing ICFG nonblocking-cntr.wvr.bpl [2021-05-03 15:36:35,794 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-03 15:36:35,795 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-03 15:36:35,800 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-03 15:36:35,801 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-03 15:36:35,869 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-05-03 15:36:35,907 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-05-03 15:36:35,933 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-03 15:36:35,934 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-03 15:36:35,934 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-03 15:36:35,934 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-03 15:36:35,934 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-03 15:36:35,934 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-03 15:36:35,934 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-03 15:36:35,935 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-03 15:36:35,946 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 23 transitions, 62 flow [2021-05-03 15:36:35,992 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) [2021-05-03 15:36:35,995 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) [2021-05-03 15:36:36,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 15:36:36,006 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:36:36,007 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:36:36,007 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:36:36,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:36:36,013 INFO L82 PathProgramCache]: Analyzing trace with hash 754791855, now seen corresponding path program 1 times [2021-05-03 15:36:36,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:36:36,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448497001] [2021-05-03 15:36:36,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:36:36,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:36:36,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:36:36,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448497001] [2021-05-03 15:36:36,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 15:36:36,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-03 15:36:36,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698037086] [2021-05-03 15:36:36,240 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 15:36:36,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:36:36,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 15:36:36,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 15:36:36,259 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), 4 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) [2021-05-03 15:36:36,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:36:36,325 INFO L93 Difference]: Finished difference Result 43 states and 77 transitions. [2021-05-03 15:36:36,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 15:36:36,327 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 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 [2021-05-03 15:36:36,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:36:36,336 INFO L225 Difference]: With dead ends: 43 [2021-05-03 15:36:36,336 INFO L226 Difference]: Without dead ends: 43 [2021-05-03 15:36:36,338 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 48.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 15:36:36,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-03 15:36:36,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2021-05-03 15:36:36,379 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) [2021-05-03 15:36:36,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 67 transitions. [2021-05-03 15:36:36,383 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 67 transitions. Word has length 15 [2021-05-03 15:36:36,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:36:36,384 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 67 transitions. [2021-05-03 15:36:36,385 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 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) [2021-05-03 15:36:36,385 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 67 transitions. [2021-05-03 15:36:36,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 15:36:36,387 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:36:36,387 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:36:36,388 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-03 15:36:36,389 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:36:36,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:36:36,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1417186195, now seen corresponding path program 1 times [2021-05-03 15:36:36,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:36:36,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105021348] [2021-05-03 15:36:36,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:36:36,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:36:36,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 15:36:36,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105021348] [2021-05-03 15:36:36,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 15:36:36,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-03 15:36:36,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217424266] [2021-05-03 15:36:36,510 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 15:36:36,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:36:36,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 15:36:36,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-03 15:36:36,513 INFO L87 Difference]: Start difference. First operand 38 states and 67 transitions. Second operand has 5 states, 5 states have (on average 3.4) 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) [2021-05-03 15:36:36,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:36:36,562 INFO L93 Difference]: Finished difference Result 50 states and 91 transitions. [2021-05-03 15:36:36,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 15:36:36,563 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) 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 [2021-05-03 15:36:36,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:36:36,566 INFO L225 Difference]: With dead ends: 50 [2021-05-03 15:36:36,566 INFO L226 Difference]: Without dead ends: 50 [2021-05-03 15:36:36,568 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 36.9ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-05-03 15:36:36,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-03 15:36:36,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2021-05-03 15:36:36,581 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) [2021-05-03 15:36:36,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 79 transitions. [2021-05-03 15:36:36,584 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 79 transitions. Word has length 17 [2021-05-03 15:36:36,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:36:36,584 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 79 transitions. [2021-05-03 15:36:36,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) 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) [2021-05-03 15:36:36,585 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 79 transitions. [2021-05-03 15:36:36,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 15:36:36,586 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:36:36,586 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:36:36,586 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-03 15:36:36,586 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:36:36,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:36:36,588 INFO L82 PathProgramCache]: Analyzing trace with hash -806719381, now seen corresponding path program 1 times [2021-05-03 15:36:36,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:36:36,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061460469] [2021-05-03 15:36:36,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:36:36,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:36:36,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:36:36,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061460469] [2021-05-03 15:36:36,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202171841] [2021-05-03 15:36:36,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:36:36,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:36:36,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 15:36:36,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:36:36,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:36:36,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:36:36,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-05-03 15:36:36,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072612289] [2021-05-03 15:36:36,999 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 15:36:36,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:36:36,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 15:36:37,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 15:36:37,001 INFO L87 Difference]: Start difference. First operand 44 states and 79 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 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) [2021-05-03 15:36:37,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:36:37,099 INFO L93 Difference]: Finished difference Result 99 states and 185 transitions. [2021-05-03 15:36:37,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-03 15:36:37,107 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 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 19 [2021-05-03 15:36:37,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:36:37,108 INFO L225 Difference]: With dead ends: 99 [2021-05-03 15:36:37,108 INFO L226 Difference]: Without dead ends: 78 [2021-05-03 15:36:37,109 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 42.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 15:36:37,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-05-03 15:36:37,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 59. [2021-05-03 15:36:37,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.9310344827586208) internal successors, (112), 58 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:36:37,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 112 transitions. [2021-05-03 15:36:37,116 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 112 transitions. Word has length 19 [2021-05-03 15:36:37,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:36:37,117 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 112 transitions. [2021-05-03 15:36:37,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 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) [2021-05-03 15:36:37,117 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 112 transitions. [2021-05-03 15:36:37,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 15:36:37,118 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:36:37,118 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:36:37,327 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-03 15:36:37,328 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:36:37,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:36:37,329 INFO L82 PathProgramCache]: Analyzing trace with hash -654987203, now seen corresponding path program 2 times [2021-05-03 15:36:37,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:36:37,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598982280] [2021-05-03 15:36:37,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:36:37,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:36:37,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:36:37,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598982280] [2021-05-03 15:36:37,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174497478] [2021-05-03 15:36:37,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:36:37,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:36:37,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:36:37,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 15:36:37,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:36:37,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:36:37,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:36:37,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-05-03 15:36:37,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037324079] [2021-05-03 15:36:37,542 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 15:36:37,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:36:37,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 15:36:37,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-03 15:36:37,543 INFO L87 Difference]: Start difference. First operand 59 states and 112 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 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) [2021-05-03 15:36:37,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:36:37,577 INFO L93 Difference]: Finished difference Result 80 states and 151 transitions. [2021-05-03 15:36:37,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 15:36:37,580 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 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 19 [2021-05-03 15:36:37,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:36:37,581 INFO L225 Difference]: With dead ends: 80 [2021-05-03 15:36:37,581 INFO L226 Difference]: Without dead ends: 77 [2021-05-03 15:36:37,582 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 34.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-03 15:36:37,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-03 15:36:37,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2021-05-03 15:36:37,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.9333333333333333) internal successors, (116), 60 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:36:37,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 116 transitions. [2021-05-03 15:36:37,590 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 116 transitions. Word has length 19 [2021-05-03 15:36:37,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:36:37,591 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 116 transitions. [2021-05-03 15:36:37,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 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) [2021-05-03 15:36:37,591 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 116 transitions. [2021-05-03 15:36:37,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 15:36:37,593 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:36:37,594 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:36:37,815 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:36:37,816 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:36:37,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:36:37,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1736336617, now seen corresponding path program 3 times [2021-05-03 15:36:37,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:36:37,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933458465] [2021-05-03 15:36:37,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:36:37,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:36:37,936 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:36:37,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933458465] [2021-05-03 15:36:37,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664581466] [2021-05-03 15:36:37,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:36:38,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 15:36:38,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:36:38,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 15:36:38,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:36:38,246 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:36:38,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:36:38,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-05-03 15:36:38,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438846456] [2021-05-03 15:36:38,247 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 15:36:38,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:36:38,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 15:36:38,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-05-03 15:36:38,248 INFO L87 Difference]: Start difference. First operand 61 states and 116 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:36:38,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:36:38,587 INFO L93 Difference]: Finished difference Result 198 states and 365 transitions. [2021-05-03 15:36:38,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 15:36:38,590 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 15:36:38,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:36:38,595 INFO L225 Difference]: With dead ends: 198 [2021-05-03 15:36:38,595 INFO L226 Difference]: Without dead ends: 192 [2021-05-03 15:36:38,596 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 316.4ms TimeCoverageRelationStatistics Valid=199, Invalid=503, Unknown=0, NotChecked=0, Total=702 [2021-05-03 15:36:38,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-05-03 15:36:38,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 90. [2021-05-03 15:36:38,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.033707865168539) internal successors, (181), 89 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:36:38,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 181 transitions. [2021-05-03 15:36:38,616 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 181 transitions. Word has length 21 [2021-05-03 15:36:38,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:36:38,616 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 181 transitions. [2021-05-03 15:36:38,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:36:38,617 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 181 transitions. [2021-05-03 15:36:38,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 15:36:38,617 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:36:38,617 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:36:38,837 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:36:38,837 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:36:38,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:36:38,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1986148955, now seen corresponding path program 4 times [2021-05-03 15:36:38,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:36:38,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576093665] [2021-05-03 15:36:38,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:36:38,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:36:38,883 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:36:38,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576093665] [2021-05-03 15:36:38,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950774113] [2021-05-03 15:36:38,883 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 [2021-05-03 15:36:38,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:36:38,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:36:38,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 15:36:38,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:36:39,146 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:36:39,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:36:39,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 12 [2021-05-03 15:36:39,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79622497] [2021-05-03 15:36:39,147 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 15:36:39,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:36:39,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 15:36:39,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-05-03 15:36:39,148 INFO L87 Difference]: Start difference. First operand 90 states and 181 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:36:39,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:36:39,589 INFO L93 Difference]: Finished difference Result 170 states and 325 transitions. [2021-05-03 15:36:39,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 15:36:39,590 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-05-03 15:36:39,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:36:39,595 INFO L225 Difference]: With dead ends: 170 [2021-05-03 15:36:39,605 INFO L226 Difference]: Without dead ends: 166 [2021-05-03 15:36:39,605 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 361.9ms TimeCoverageRelationStatistics Valid=186, Invalid=464, Unknown=0, NotChecked=0, Total=650 [2021-05-03 15:36:39,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-05-03 15:36:39,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 92. [2021-05-03 15:36:39,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.010989010989011) internal successors, (183), 91 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:36:39,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 183 transitions. [2021-05-03 15:36:39,611 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 183 transitions. Word has length 21 [2021-05-03 15:36:39,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:36:39,612 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 183 transitions. [2021-05-03 15:36:39,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:36:39,612 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 183 transitions. [2021-05-03 15:36:39,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 15:36:39,613 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:36:39,613 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:36:39,834 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:36:39,842 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:36:39,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:36:39,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1249492263, now seen corresponding path program 5 times [2021-05-03 15:36:39,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:36:39,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679131522] [2021-05-03 15:36:39,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:36:39,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:36:39,951 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:36:39,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679131522] [2021-05-03 15:36:39,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085823200] [2021-05-03 15:36:39,952 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:36:39,993 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 15:36:39,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:36:39,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 15:36:39,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:36:40,085 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:36:40,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:36:40,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-05-03 15:36:40,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857589760] [2021-05-03 15:36:40,087 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 15:36:40,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:36:40,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 15:36:40,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-03 15:36:40,088 INFO L87 Difference]: Start difference. First operand 92 states and 183 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:36:40,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:36:40,120 INFO L93 Difference]: Finished difference Result 190 states and 376 transitions. [2021-05-03 15:36:40,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 15:36:40,120 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-03 15:36:40,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:36:40,121 INFO L225 Difference]: With dead ends: 190 [2021-05-03 15:36:40,122 INFO L226 Difference]: Without dead ends: 163 [2021-05-03 15:36:40,122 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 52.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-03 15:36:40,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-05-03 15:36:40,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 120. [2021-05-03 15:36:40,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.0840336134453783) internal successors, (248), 119 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:36:40,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 248 transitions. [2021-05-03 15:36:40,130 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 248 transitions. Word has length 23 [2021-05-03 15:36:40,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:36:40,131 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 248 transitions. [2021-05-03 15:36:40,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:36:40,131 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 248 transitions. [2021-05-03 15:36:40,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 15:36:40,132 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:36:40,132 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:36:40,349 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:36:40,349 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:36:40,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:36:40,350 INFO L82 PathProgramCache]: Analyzing trace with hash -145594503, now seen corresponding path program 6 times [2021-05-03 15:36:40,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:36:40,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799562250] [2021-05-03 15:36:40,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:36:40,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:36:40,476 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:36:40,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799562250] [2021-05-03 15:36:40,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954686152] [2021-05-03 15:36:40,477 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:36:40,508 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 15:36:40,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:36:40,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 15:36:40,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:36:40,760 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:36:40,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:36:40,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-05-03 15:36:40,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584012072] [2021-05-03 15:36:40,761 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 15:36:40,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:36:40,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 15:36:40,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-05-03 15:36:40,762 INFO L87 Difference]: Start difference. First operand 120 states and 248 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:36:41,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:36:41,317 INFO L93 Difference]: Finished difference Result 320 states and 619 transitions. [2021-05-03 15:36:41,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 15:36:41,317 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-03 15:36:41,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:36:41,320 INFO L225 Difference]: With dead ends: 320 [2021-05-03 15:36:41,321 INFO L226 Difference]: Without dead ends: 302 [2021-05-03 15:36:41,321 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 510.6ms TimeCoverageRelationStatistics Valid=246, Invalid=876, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 15:36:41,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-05-03 15:36:41,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 141. [2021-05-03 15:36:41,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.092857142857143) internal successors, (293), 140 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:36:41,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 293 transitions. [2021-05-03 15:36:41,328 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 293 transitions. Word has length 23 [2021-05-03 15:36:41,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:36:41,329 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 293 transitions. [2021-05-03 15:36:41,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:36:41,329 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 293 transitions. [2021-05-03 15:36:41,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 15:36:41,330 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:36:41,330 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:36:41,545 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:36:41,545 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:36:41,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:36:41,546 INFO L82 PathProgramCache]: Analyzing trace with hash -214603481, now seen corresponding path program 7 times [2021-05-03 15:36:41,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:36:41,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120935047] [2021-05-03 15:36:41,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:36:41,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:36:41,632 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:36:41,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120935047] [2021-05-03 15:36:41,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255735] [2021-05-03 15:36:41,633 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:36:41,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:36:41,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-03 15:36:41,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:36:41,815 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:36:41,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:36:41,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-05-03 15:36:41,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20278125] [2021-05-03 15:36:41,817 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 15:36:41,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:36:41,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 15:36:41,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-05-03 15:36:41,818 INFO L87 Difference]: Start difference. First operand 141 states and 293 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:36:42,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:36:42,151 INFO L93 Difference]: Finished difference Result 321 states and 651 transitions. [2021-05-03 15:36:42,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 15:36:42,152 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-03 15:36:42,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:36:42,154 INFO L225 Difference]: With dead ends: 321 [2021-05-03 15:36:42,154 INFO L226 Difference]: Without dead ends: 317 [2021-05-03 15:36:42,154 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 284.6ms TimeCoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2021-05-03 15:36:42,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-05-03 15:36:42,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 173. [2021-05-03 15:36:42,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.1744186046511627) internal successors, (374), 172 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:36:42,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 374 transitions. [2021-05-03 15:36:42,166 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 374 transitions. Word has length 23 [2021-05-03 15:36:42,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:36:42,166 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 374 transitions. [2021-05-03 15:36:42,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:36:42,167 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 374 transitions. [2021-05-03 15:36:42,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 15:36:42,168 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:36:42,168 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:36:42,373 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-03 15:36:42,373 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:36:42,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:36:42,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1440957093, now seen corresponding path program 8 times [2021-05-03 15:36:42,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:36:42,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456356643] [2021-05-03 15:36:42,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:36:42,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:36:42,478 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:36:42,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456356643] [2021-05-03 15:36:42,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040365181] [2021-05-03 15:36:42,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:36:42,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:36:42,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:36:42,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 15:36:42,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:36:42,749 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:36:42,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:36:42,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-05-03 15:36:42,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453329095] [2021-05-03 15:36:42,750 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 15:36:42,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:36:42,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 15:36:42,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-05-03 15:36:42,751 INFO L87 Difference]: Start difference. First operand 173 states and 374 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:36:43,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:36:43,352 INFO L93 Difference]: Finished difference Result 435 states and 865 transitions. [2021-05-03 15:36:43,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 15:36:43,353 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 15:36:43,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:36:43,355 INFO L225 Difference]: With dead ends: 435 [2021-05-03 15:36:43,355 INFO L226 Difference]: Without dead ends: 417 [2021-05-03 15:36:43,356 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 500.4ms TimeCoverageRelationStatistics Valid=465, Invalid=1257, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 15:36:43,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-05-03 15:36:43,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 186. [2021-05-03 15:36:43,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.156756756756757) internal successors, (399), 185 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:36:43,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 399 transitions. [2021-05-03 15:36:43,363 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 399 transitions. Word has length 25 [2021-05-03 15:36:43,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:36:43,363 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 399 transitions. [2021-05-03 15:36:43,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:36:43,364 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 399 transitions. [2021-05-03 15:36:43,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 15:36:43,364 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:36:43,365 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:36:43,581 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-03 15:36:43,581 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:36:43,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:36:43,582 INFO L82 PathProgramCache]: Analyzing trace with hash 2077134939, now seen corresponding path program 9 times [2021-05-03 15:36:43,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:36:43,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951431561] [2021-05-03 15:36:43,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:36:43,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:36:43,662 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:36:43,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951431561] [2021-05-03 15:36:43,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111322392] [2021-05-03 15:36:43,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:36:43,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 15:36:43,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:36:43,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 15:36:43,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:36:43,871 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:36:43,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:36:43,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 15 [2021-05-03 15:36:43,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143217906] [2021-05-03 15:36:43,872 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 15:36:43,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:36:43,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 15:36:43,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-05-03 15:36:43,873 INFO L87 Difference]: Start difference. First operand 186 states and 399 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:36:44,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:36:44,452 INFO L93 Difference]: Finished difference Result 340 states and 687 transitions. [2021-05-03 15:36:44,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 15:36:44,452 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 15:36:44,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:36:44,454 INFO L225 Difference]: With dead ends: 340 [2021-05-03 15:36:44,454 INFO L226 Difference]: Without dead ends: 336 [2021-05-03 15:36:44,455 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 491.3ms TimeCoverageRelationStatistics Valid=368, Invalid=1038, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 15:36:44,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-05-03 15:36:44,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 186. [2021-05-03 15:36:44,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.151351351351351) internal successors, (398), 185 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:36:44,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 398 transitions. [2021-05-03 15:36:44,462 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 398 transitions. Word has length 25 [2021-05-03 15:36:44,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:36:44,462 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 398 transitions. [2021-05-03 15:36:44,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:36:44,463 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 398 transitions. [2021-05-03 15:36:44,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 15:36:44,463 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:36:44,463 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:36:44,677 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:36:44,677 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:36:44,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:36:44,678 INFO L82 PathProgramCache]: Analyzing trace with hash 857611235, now seen corresponding path program 10 times [2021-05-03 15:36:44,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:36:44,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333913681] [2021-05-03 15:36:44,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:36:44,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:36:44,768 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:36:44,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333913681] [2021-05-03 15:36:44,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296312387] [2021-05-03 15:36:44,768 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 [2021-05-03 15:36:44,819 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:36:44,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:36:44,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 15:36:44,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:36:44,884 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:36:44,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:36:44,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-05-03 15:36:44,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093299229] [2021-05-03 15:36:44,885 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 15:36:44,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:36:44,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 15:36:44,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-03 15:36:44,886 INFO L87 Difference]: Start difference. First operand 186 states and 398 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 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) [2021-05-03 15:36:44,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:36:44,921 INFO L93 Difference]: Finished difference Result 354 states and 734 transitions. [2021-05-03 15:36:44,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 15:36:44,921 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 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 27 [2021-05-03 15:36:44,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:36:44,922 INFO L225 Difference]: With dead ends: 354 [2021-05-03 15:36:44,923 INFO L226 Difference]: Without dead ends: 321 [2021-05-03 15:36:44,923 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 39.9ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-03 15:36:44,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-05-03 15:36:44,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 242. [2021-05-03 15:36:44,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.203319502074689) internal successors, (531), 241 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:36:44,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 531 transitions. [2021-05-03 15:36:44,931 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 531 transitions. Word has length 27 [2021-05-03 15:36:44,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:36:44,931 INFO L480 AbstractCegarLoop]: Abstraction has 242 states and 531 transitions. [2021-05-03 15:36:44,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 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) [2021-05-03 15:36:44,931 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 531 transitions. [2021-05-03 15:36:44,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 15:36:44,932 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:36:44,932 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:36:45,141 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:36:45,142 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:36:45,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:36:45,143 INFO L82 PathProgramCache]: Analyzing trace with hash -971796299, now seen corresponding path program 11 times [2021-05-03 15:36:45,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:36:45,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622651563] [2021-05-03 15:36:45,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:36:45,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:36:45,294 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:36:45,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622651563] [2021-05-03 15:36:45,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236197489] [2021-05-03 15:36:45,295 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:36:45,318 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 15:36:45,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:36:45,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-03 15:36:45,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:36:45,549 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:36:45,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:36:45,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-05-03 15:36:45,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059087677] [2021-05-03 15:36:45,552 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 15:36:45,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:36:45,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 15:36:45,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-05-03 15:36:45,554 INFO L87 Difference]: Start difference. First operand 242 states and 531 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:36:46,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:36:46,494 INFO L93 Difference]: Finished difference Result 559 states and 1127 transitions. [2021-05-03 15:36:46,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 15:36:46,495 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 15:36:46,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:36:46,497 INFO L225 Difference]: With dead ends: 559 [2021-05-03 15:36:46,497 INFO L226 Difference]: Without dead ends: 553 [2021-05-03 15:36:46,498 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 736.0ms TimeCoverageRelationStatistics Valid=368, Invalid=1702, Unknown=0, NotChecked=0, Total=2070 [2021-05-03 15:36:46,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-05-03 15:36:46,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 234. [2021-05-03 15:36:46,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.2060085836909873) internal successors, (514), 233 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:36:46,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 514 transitions. [2021-05-03 15:36:46,522 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 514 transitions. Word has length 27 [2021-05-03 15:36:46,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:36:46,522 INFO L480 AbstractCegarLoop]: Abstraction has 234 states and 514 transitions. [2021-05-03 15:36:46,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:36:46,522 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 514 transitions. [2021-05-03 15:36:46,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 15:36:46,524 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:36:46,525 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:36:46,737 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-03 15:36:46,737 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:36:46,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:36:46,738 INFO L82 PathProgramCache]: Analyzing trace with hash -986406343, now seen corresponding path program 12 times [2021-05-03 15:36:46,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:36:46,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679619111] [2021-05-03 15:36:46,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:36:46,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:36:46,860 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:36:46,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679619111] [2021-05-03 15:36:46,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756364262] [2021-05-03 15:36:46,861 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:36:46,888 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 15:36:46,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:36:46,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-03 15:36:46,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:36:47,145 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:36:47,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:36:47,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-05-03 15:36:47,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846452065] [2021-05-03 15:36:47,147 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 15:36:47,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:36:47,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 15:36:47,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-05-03 15:36:47,148 INFO L87 Difference]: Start difference. First operand 234 states and 514 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:36:47,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:36:47,972 INFO L93 Difference]: Finished difference Result 976 states and 2009 transitions. [2021-05-03 15:36:47,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 15:36:47,974 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 15:36:47,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:36:47,977 INFO L225 Difference]: With dead ends: 976 [2021-05-03 15:36:47,978 INFO L226 Difference]: Without dead ends: 940 [2021-05-03 15:36:47,979 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 702.5ms TimeCoverageRelationStatistics Valid=488, Invalid=1864, Unknown=0, NotChecked=0, Total=2352 [2021-05-03 15:36:47,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 940 states. [2021-05-03 15:36:47,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 940 to 311. [2021-05-03 15:36:47,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 2.229032258064516) internal successors, (691), 310 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:36:47,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 691 transitions. [2021-05-03 15:36:47,994 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 691 transitions. Word has length 27 [2021-05-03 15:36:47,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:36:47,994 INFO L480 AbstractCegarLoop]: Abstraction has 311 states and 691 transitions. [2021-05-03 15:36:47,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:36:47,994 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 691 transitions. [2021-05-03 15:36:47,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 15:36:47,995 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:36:47,995 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:36:48,200 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-03 15:36:48,200 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:36:48,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:36:48,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1716772253, now seen corresponding path program 13 times [2021-05-03 15:36:48,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:36:48,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522571264] [2021-05-03 15:36:48,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:36:48,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:36:48,308 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:36:48,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522571264] [2021-05-03 15:36:48,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117727039] [2021-05-03 15:36:48,309 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:36:48,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:36:48,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-03 15:36:48,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:36:48,592 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:36:48,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:36:48,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-05-03 15:36:48,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771587552] [2021-05-03 15:36:48,593 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 15:36:48,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:36:48,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 15:36:48,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-05-03 15:36:48,594 INFO L87 Difference]: Start difference. First operand 311 states and 691 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:36:49,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:36:49,348 INFO L93 Difference]: Finished difference Result 802 states and 1701 transitions. [2021-05-03 15:36:49,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-03 15:36:49,349 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 15:36:49,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:36:49,352 INFO L225 Difference]: With dead ends: 802 [2021-05-03 15:36:49,352 INFO L226 Difference]: Without dead ends: 794 [2021-05-03 15:36:49,353 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 685.9ms TimeCoverageRelationStatistics Valid=469, Invalid=1981, Unknown=0, NotChecked=0, Total=2450 [2021-05-03 15:36:49,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2021-05-03 15:36:49,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 259. [2021-05-03 15:36:49,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 2.182170542635659) internal successors, (563), 258 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:36:49,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 563 transitions. [2021-05-03 15:36:49,365 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 563 transitions. Word has length 27 [2021-05-03 15:36:49,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:36:49,365 INFO L480 AbstractCegarLoop]: Abstraction has 259 states and 563 transitions. [2021-05-03 15:36:49,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:36:49,365 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 563 transitions. [2021-05-03 15:36:49,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:36:49,366 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:36:49,366 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:36:49,580 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-03 15:36:49,581 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:36:49,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:36:49,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1154698655, now seen corresponding path program 14 times [2021-05-03 15:36:49,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:36:49,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665790834] [2021-05-03 15:36:49,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:36:49,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:36:49,670 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:36:49,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665790834] [2021-05-03 15:36:49,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38602960] [2021-05-03 15:36:49,671 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 [2021-05-03 15:36:49,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:36:49,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:36:49,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-03 15:36:49,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:36:49,977 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:36:49,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:36:49,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-05-03 15:36:49,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923827909] [2021-05-03 15:36:49,978 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 15:36:49,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:36:49,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 15:36:49,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2021-05-03 15:36:49,979 INFO L87 Difference]: Start difference. First operand 259 states and 563 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:36:50,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:36:50,895 INFO L93 Difference]: Finished difference Result 680 states and 1358 transitions. [2021-05-03 15:36:50,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-03 15:36:50,896 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:36:50,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:36:50,899 INFO L225 Difference]: With dead ends: 680 [2021-05-03 15:36:50,899 INFO L226 Difference]: Without dead ends: 638 [2021-05-03 15:36:50,900 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 778.7ms TimeCoverageRelationStatistics Valid=840, Invalid=2352, Unknown=0, NotChecked=0, Total=3192 [2021-05-03 15:36:50,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-05-03 15:36:50,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 270. [2021-05-03 15:36:50,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.163568773234201) internal successors, (582), 269 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) [2021-05-03 15:36:50,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 582 transitions. [2021-05-03 15:36:50,909 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 582 transitions. Word has length 29 [2021-05-03 15:36:50,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:36:50,909 INFO L480 AbstractCegarLoop]: Abstraction has 270 states and 582 transitions. [2021-05-03 15:36:50,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:36:50,909 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 582 transitions. [2021-05-03 15:36:50,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:36:50,910 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:36:50,910 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:36:51,129 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:36:51,129 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:36:51,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:36:51,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1411544923, now seen corresponding path program 15 times [2021-05-03 15:36:51,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:36:51,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252250375] [2021-05-03 15:36:51,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:36:51,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:36:51,194 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:36:51,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252250375] [2021-05-03 15:36:51,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594316983] [2021-05-03 15:36:51,194 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 [2021-05-03 15:36:51,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-03 15:36:51,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:36:51,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 15:36:51,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:36:51,464 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:36:51,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:36:51,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12] total 18 [2021-05-03 15:36:51,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952547257] [2021-05-03 15:36:51,465 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 15:36:51,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:36:51,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 15:36:51,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-05-03 15:36:51,466 INFO L87 Difference]: Start difference. First operand 270 states and 582 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:36:52,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:36:52,250 INFO L93 Difference]: Finished difference Result 520 states and 1058 transitions. [2021-05-03 15:36:52,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-03 15:36:52,251 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:36:52,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:36:52,257 INFO L225 Difference]: With dead ends: 520 [2021-05-03 15:36:52,257 INFO L226 Difference]: Without dead ends: 516 [2021-05-03 15:36:52,258 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 743.1ms TimeCoverageRelationStatistics Valid=661, Invalid=1991, Unknown=0, NotChecked=0, Total=2652 [2021-05-03 15:36:52,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-05-03 15:36:52,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 270. [2021-05-03 15:36:52,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.159851301115242) internal successors, (581), 269 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:36:52,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 581 transitions. [2021-05-03 15:36:52,269 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 581 transitions. Word has length 29 [2021-05-03 15:36:52,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:36:52,269 INFO L480 AbstractCegarLoop]: Abstraction has 270 states and 581 transitions. [2021-05-03 15:36:52,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:36:52,269 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 581 transitions. [2021-05-03 15:36:52,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-03 15:36:52,270 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:36:52,270 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:36:52,489 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:36:52,489 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:36:52,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:36:52,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1808436383, now seen corresponding path program 16 times [2021-05-03 15:36:52,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:36:52,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410960386] [2021-05-03 15:36:52,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:36:52,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:36:52,597 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:36:52,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410960386] [2021-05-03 15:36:52,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401632100] [2021-05-03 15:36:52,598 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 [2021-05-03 15:36:52,651 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:36:52,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:36:52,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-03 15:36:52,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:36:52,716 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:36:52,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:36:52,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-05-03 15:36:52,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667059662] [2021-05-03 15:36:52,716 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 15:36:52,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:36:52,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 15:36:52,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-03 15:36:52,717 INFO L87 Difference]: Start difference. First operand 270 states and 581 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 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) [2021-05-03 15:36:52,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:36:52,763 INFO L93 Difference]: Finished difference Result 492 states and 1028 transitions. [2021-05-03 15:36:52,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 15:36:52,764 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 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 31 [2021-05-03 15:36:52,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:36:52,766 INFO L225 Difference]: With dead ends: 492 [2021-05-03 15:36:52,766 INFO L226 Difference]: Without dead ends: 453 [2021-05-03 15:36:52,767 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 42.2ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-03 15:36:52,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-05-03 15:36:52,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 337. [2021-05-03 15:36:52,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.1845238095238093) internal successors, (734), 336 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) [2021-05-03 15:36:52,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 734 transitions. [2021-05-03 15:36:52,775 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 734 transitions. Word has length 31 [2021-05-03 15:36:52,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:36:52,776 INFO L480 AbstractCegarLoop]: Abstraction has 337 states and 734 transitions. [2021-05-03 15:36:52,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 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) [2021-05-03 15:36:52,776 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 734 transitions. [2021-05-03 15:36:52,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-03 15:36:52,776 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:36:52,777 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:36:52,992 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:36:52,993 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:36:52,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:36:52,993 INFO L82 PathProgramCache]: Analyzing trace with hash -791401487, now seen corresponding path program 17 times [2021-05-03 15:36:52,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:36:52,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701589980] [2021-05-03 15:36:52,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:36:53,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:36:53,155 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:36:53,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701589980] [2021-05-03 15:36:53,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497457438] [2021-05-03 15:36:53,155 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 [2021-05-03 15:36:53,179 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 15:36:53,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:36:53,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 15:36:53,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:36:53,464 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:36:53,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:36:53,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-05-03 15:36:53,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350429072] [2021-05-03 15:36:53,467 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 15:36:53,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:36:53,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 15:36:53,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-05-03 15:36:53,468 INFO L87 Difference]: Start difference. First operand 337 states and 734 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:36:54,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:36:54,563 INFO L93 Difference]: Finished difference Result 772 states and 1552 transitions. [2021-05-03 15:36:54,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-03 15:36:54,563 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-05-03 15:36:54,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:36:54,566 INFO L225 Difference]: With dead ends: 772 [2021-05-03 15:36:54,566 INFO L226 Difference]: Without dead ends: 766 [2021-05-03 15:36:54,567 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 785 ImplicationChecksByTransitivity, 984.1ms TimeCoverageRelationStatistics Valid=490, Invalid=2816, Unknown=0, NotChecked=0, Total=3306 [2021-05-03 15:36:54,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2021-05-03 15:36:54,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 328. [2021-05-03 15:36:54,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.2110091743119265) internal successors, (723), 327 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) [2021-05-03 15:36:54,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 723 transitions. [2021-05-03 15:36:54,578 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 723 transitions. Word has length 31 [2021-05-03 15:36:54,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:36:54,578 INFO L480 AbstractCegarLoop]: Abstraction has 328 states and 723 transitions. [2021-05-03 15:36:54,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:36:54,578 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 723 transitions. [2021-05-03 15:36:54,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-03 15:36:54,579 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:36:54,579 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:36:54,793 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-03 15:36:54,793 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:36:54,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:36:54,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1870213771, now seen corresponding path program 18 times [2021-05-03 15:36:54,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:36:54,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252179495] [2021-05-03 15:36:54,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:36:54,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:36:54,924 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:36:54,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252179495] [2021-05-03 15:36:54,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252188590] [2021-05-03 15:36:54,924 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 [2021-05-03 15:36:54,948 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-03 15:36:54,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:36:54,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 15:36:54,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:36:55,195 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:36:55,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:36:55,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-05-03 15:36:55,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178370747] [2021-05-03 15:36:55,196 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 15:36:55,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:36:55,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 15:36:55,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-05-03 15:36:55,197 INFO L87 Difference]: Start difference. First operand 328 states and 723 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:36:56,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:36:56,572 INFO L93 Difference]: Finished difference Result 1342 states and 2716 transitions. [2021-05-03 15:36:56,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-03 15:36:56,573 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-05-03 15:36:56,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:36:56,577 INFO L225 Difference]: With dead ends: 1342 [2021-05-03 15:36:56,577 INFO L226 Difference]: Without dead ends: 1318 [2021-05-03 15:36:56,579 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1165 ImplicationChecksByTransitivity, 1055.0ms TimeCoverageRelationStatistics Valid=720, Invalid=3312, Unknown=0, NotChecked=0, Total=4032 [2021-05-03 15:36:56,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2021-05-03 15:36:56,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 404. [2021-05-03 15:36:56,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.2531017369727047) internal successors, (908), 403 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:36:56,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 908 transitions. [2021-05-03 15:36:56,594 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 908 transitions. Word has length 31 [2021-05-03 15:36:56,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:36:56,594 INFO L480 AbstractCegarLoop]: Abstraction has 404 states and 908 transitions. [2021-05-03 15:36:56,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:36:56,595 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 908 transitions. [2021-05-03 15:36:56,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-03 15:36:56,596 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:36:56,596 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:36:56,816 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-03 15:36:56,817 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:36:56,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:36:56,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1694387615, now seen corresponding path program 19 times [2021-05-03 15:36:56,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:36:56,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282357076] [2021-05-03 15:36:56,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:36:56,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:36:56,923 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:36:56,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282357076] [2021-05-03 15:36:56,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741801659] [2021-05-03 15:36:56,923 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:36:56,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:36:56,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 15:36:56,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:36:57,256 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:36:57,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:36:57,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-05-03 15:36:57,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580870512] [2021-05-03 15:36:57,257 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 15:36:57,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:36:57,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 15:36:57,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-05-03 15:36:57,258 INFO L87 Difference]: Start difference. First operand 404 states and 908 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:36:58,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:36:58,544 INFO L93 Difference]: Finished difference Result 1094 states and 2288 transitions. [2021-05-03 15:36:58,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-03 15:36:58,545 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-05-03 15:36:58,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:36:58,548 INFO L225 Difference]: With dead ends: 1094 [2021-05-03 15:36:58,548 INFO L226 Difference]: Without dead ends: 1090 [2021-05-03 15:36:58,550 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 1074.3ms TimeCoverageRelationStatistics Valid=599, Invalid=3061, Unknown=0, NotChecked=0, Total=3660 [2021-05-03 15:36:58,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2021-05-03 15:36:58,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 333. [2021-05-03 15:36:58,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 2.2198795180722892) internal successors, (737), 332 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:36:58,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 737 transitions. [2021-05-03 15:36:58,576 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 737 transitions. Word has length 31 [2021-05-03 15:36:58,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:36:58,577 INFO L480 AbstractCegarLoop]: Abstraction has 333 states and 737 transitions. [2021-05-03 15:36:58,577 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:36:58,577 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 737 transitions. [2021-05-03 15:36:58,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-03 15:36:58,578 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:36:58,578 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:36:58,799 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-03 15:36:58,799 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:36:58,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:36:58,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1317542905, now seen corresponding path program 20 times [2021-05-03 15:36:58,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:36:58,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454134909] [2021-05-03 15:36:58,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:36:58,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:36:58,953 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:36:58,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454134909] [2021-05-03 15:36:58,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871730105] [2021-05-03 15:36:58,953 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 [2021-05-03 15:36:58,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:36:58,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:36:58,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-03 15:36:58,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:36:59,248 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:36:59,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:36:59,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-05-03 15:36:59,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494938754] [2021-05-03 15:36:59,248 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 15:36:59,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:36:59,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 15:36:59,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2021-05-03 15:36:59,249 INFO L87 Difference]: Start difference. First operand 333 states and 737 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:37:00,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:37:00,299 INFO L93 Difference]: Finished difference Result 1727 states and 3552 transitions. [2021-05-03 15:37:00,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-03 15:37:00,306 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-05-03 15:37:00,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:37:00,311 INFO L225 Difference]: With dead ends: 1727 [2021-05-03 15:37:00,311 INFO L226 Difference]: Without dead ends: 1631 [2021-05-03 15:37:00,312 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 925.6ms TimeCoverageRelationStatistics Valid=702, Invalid=2958, Unknown=0, NotChecked=0, Total=3660 [2021-05-03 15:37:00,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1631 states. [2021-05-03 15:37:00,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1631 to 419. [2021-05-03 15:37:00,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 2.229665071770335) internal successors, (932), 418 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) [2021-05-03 15:37:00,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 932 transitions. [2021-05-03 15:37:00,327 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 932 transitions. Word has length 31 [2021-05-03 15:37:00,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:37:00,327 INFO L480 AbstractCegarLoop]: Abstraction has 419 states and 932 transitions. [2021-05-03 15:37:00,328 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:37:00,328 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 932 transitions. [2021-05-03 15:37:00,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-03 15:37:00,328 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:37:00,329 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:37:00,544 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-03 15:37:00,545 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:37:00,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:37:00,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1208538321, now seen corresponding path program 21 times [2021-05-03 15:37:00,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:37:00,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148929263] [2021-05-03 15:37:00,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:37:00,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:37:00,652 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:37:00,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148929263] [2021-05-03 15:37:00,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498856805] [2021-05-03 15:37:00,652 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 [2021-05-03 15:37:00,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 15:37:00,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:37:00,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-03 15:37:00,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:37:00,967 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:37:00,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:37:00,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-05-03 15:37:00,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856589078] [2021-05-03 15:37:00,967 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 15:37:00,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:37:00,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 15:37:00,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-05-03 15:37:00,968 INFO L87 Difference]: Start difference. First operand 419 states and 932 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:37:02,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:37:02,283 INFO L93 Difference]: Finished difference Result 1314 states and 2779 transitions. [2021-05-03 15:37:02,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-03 15:37:02,283 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-05-03 15:37:02,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:37:02,287 INFO L225 Difference]: With dead ends: 1314 [2021-05-03 15:37:02,287 INFO L226 Difference]: Without dead ends: 1310 [2021-05-03 15:37:02,288 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1423 ImplicationChecksByTransitivity, 1182.6ms TimeCoverageRelationStatistics Valid=1021, Invalid=3535, Unknown=0, NotChecked=0, Total=4556 [2021-05-03 15:37:02,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1310 states. [2021-05-03 15:37:02,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1310 to 563. [2021-05-03 15:37:02,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 562 states have (on average 2.314946619217082) internal successors, (1301), 562 states have internal predecessors, (1301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:37:02,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 1301 transitions. [2021-05-03 15:37:02,303 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 1301 transitions. Word has length 31 [2021-05-03 15:37:02,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:37:02,303 INFO L480 AbstractCegarLoop]: Abstraction has 563 states and 1301 transitions. [2021-05-03 15:37:02,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:37:02,303 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 1301 transitions. [2021-05-03 15:37:02,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-03 15:37:02,305 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:37:02,305 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:37:02,524 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:37:02,525 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:37:02,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:37:02,525 INFO L82 PathProgramCache]: Analyzing trace with hash -2054310883, now seen corresponding path program 22 times [2021-05-03 15:37:02,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:37:02,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137539921] [2021-05-03 15:37:02,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:37:02,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:37:02,642 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:37:02,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137539921] [2021-05-03 15:37:02,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070694352] [2021-05-03 15:37:02,643 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) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:37:02,679 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:37:02,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:37:02,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 15:37:02,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:37:02,960 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:37:02,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:37:02,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-05-03 15:37:02,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324583730] [2021-05-03 15:37:02,962 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 15:37:02,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:37:02,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 15:37:02,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=603, Unknown=0, NotChecked=0, Total=756 [2021-05-03 15:37:02,962 INFO L87 Difference]: Start difference. First operand 563 states and 1301 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:37:04,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:37:04,249 INFO L93 Difference]: Finished difference Result 1171 states and 2456 transitions. [2021-05-03 15:37:04,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-03 15:37:04,250 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-03 15:37:04,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:37:04,253 INFO L225 Difference]: With dead ends: 1171 [2021-05-03 15:37:04,253 INFO L226 Difference]: Without dead ends: 1099 [2021-05-03 15:37:04,255 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1517 ImplicationChecksByTransitivity, 1136.6ms TimeCoverageRelationStatistics Valid=1404, Invalid=3998, Unknown=0, NotChecked=0, Total=5402 [2021-05-03 15:37:04,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2021-05-03 15:37:04,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 572. [2021-05-03 15:37:04,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 571 states have (on average 2.3012259194395797) internal successors, (1314), 571 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:37:04,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 1314 transitions. [2021-05-03 15:37:04,268 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 1314 transitions. Word has length 33 [2021-05-03 15:37:04,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:37:04,268 INFO L480 AbstractCegarLoop]: Abstraction has 572 states and 1314 transitions. [2021-05-03 15:37:04,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:37:04,268 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 1314 transitions. [2021-05-03 15:37:04,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-03 15:37:04,270 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:37:04,270 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:37:04,484 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:37:04,485 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:37:04,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:37:04,485 INFO L82 PathProgramCache]: Analyzing trace with hash -120770725, now seen corresponding path program 23 times [2021-05-03 15:37:04,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:37:04,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388255243] [2021-05-03 15:37:04,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:37:04,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:37:04,553 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:37:04,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388255243] [2021-05-03 15:37:04,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775310933] [2021-05-03 15:37:04,554 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 [2021-05-03 15:37:04,577 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-03 15:37:04,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:37:04,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 15:37:04,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:37:04,844 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:37:04,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:37:04,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14] total 21 [2021-05-03 15:37:04,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457865621] [2021-05-03 15:37:04,845 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 15:37:04,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:37:04,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 15:37:04,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2021-05-03 15:37:04,845 INFO L87 Difference]: Start difference. First operand 572 states and 1314 transitions. Second operand has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:37:06,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:37:06,663 INFO L93 Difference]: Finished difference Result 984 states and 2110 transitions. [2021-05-03 15:37:06,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-05-03 15:37:06,664 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-03 15:37:06,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:37:06,667 INFO L225 Difference]: With dead ends: 984 [2021-05-03 15:37:06,667 INFO L226 Difference]: Without dead ends: 980 [2021-05-03 15:37:06,670 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2577 ImplicationChecksByTransitivity, 1650.8ms TimeCoverageRelationStatistics Valid=1834, Invalid=5822, Unknown=0, NotChecked=0, Total=7656 [2021-05-03 15:37:06,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2021-05-03 15:37:06,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 572. [2021-05-03 15:37:06,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 571 states have (on average 2.2994746059544657) internal successors, (1313), 571 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:37:06,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 1313 transitions. [2021-05-03 15:37:06,685 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 1313 transitions. Word has length 33 [2021-05-03 15:37:06,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:37:06,685 INFO L480 AbstractCegarLoop]: Abstraction has 572 states and 1313 transitions. [2021-05-03 15:37:06,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:37:06,686 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 1313 transitions. [2021-05-03 15:37:06,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-03 15:37:06,692 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:37:06,692 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:37:06,904 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-03 15:37:06,905 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:37:06,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:37:06,905 INFO L82 PathProgramCache]: Analyzing trace with hash 569511771, now seen corresponding path program 24 times [2021-05-03 15:37:06,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:37:06,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89704701] [2021-05-03 15:37:06,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:37:06,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:37:07,011 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:37:07,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89704701] [2021-05-03 15:37:07,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820875512] [2021-05-03 15:37:07,011 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 [2021-05-03 15:37:07,038 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 15:37:07,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:37:07,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 15:37:07,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:37:07,098 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:37:07,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:37:07,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-05-03 15:37:07,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580675082] [2021-05-03 15:37:07,099 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 15:37:07,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:37:07,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 15:37:07,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-03 15:37:07,101 INFO L87 Difference]: Start difference. First operand 572 states and 1313 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:37:07,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:37:07,155 INFO L93 Difference]: Finished difference Result 922 states and 2046 transitions. [2021-05-03 15:37:07,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 15:37:07,156 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 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 35 [2021-05-03 15:37:07,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:37:07,158 INFO L225 Difference]: With dead ends: 922 [2021-05-03 15:37:07,159 INFO L226 Difference]: Without dead ends: 877 [2021-05-03 15:37:07,159 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 59.3ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-03 15:37:07,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2021-05-03 15:37:07,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 720. [2021-05-03 15:37:07,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 720 states, 719 states have (on average 2.3379694019471486) internal successors, (1681), 719 states have internal predecessors, (1681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:37:07,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 1681 transitions. [2021-05-03 15:37:07,173 INFO L78 Accepts]: Start accepts. Automaton has 720 states and 1681 transitions. Word has length 35 [2021-05-03 15:37:07,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:37:07,173 INFO L480 AbstractCegarLoop]: Abstraction has 720 states and 1681 transitions. [2021-05-03 15:37:07,173 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:37:07,174 INFO L276 IsEmpty]: Start isEmpty. Operand 720 states and 1681 transitions. [2021-05-03 15:37:07,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-03 15:37:07,176 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:37:07,176 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:37:07,395 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:37:07,396 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:37:07,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:37:07,396 INFO L82 PathProgramCache]: Analyzing trace with hash 615463213, now seen corresponding path program 25 times [2021-05-03 15:37:07,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:37:07,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578818575] [2021-05-03 15:37:07,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:37:07,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:37:07,578 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:37:07,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578818575] [2021-05-03 15:37:07,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062666126] [2021-05-03 15:37:07,580 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 [2021-05-03 15:37:07,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:37:07,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 15:37:07,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:37:07,940 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:37:07,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:37:07,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-05-03 15:37:07,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960811006] [2021-05-03 15:37:07,941 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-03 15:37:07,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:37:07,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-03 15:37:07,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2021-05-03 15:37:07,943 INFO L87 Difference]: Start difference. First operand 720 states and 1681 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:37:09,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:37:09,655 INFO L93 Difference]: Finished difference Result 1286 states and 2740 transitions. [2021-05-03 15:37:09,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-03 15:37:09,655 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-03 15:37:09,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:37:09,659 INFO L225 Difference]: With dead ends: 1286 [2021-05-03 15:37:09,659 INFO L226 Difference]: Without dead ends: 1280 [2021-05-03 15:37:09,660 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1182 ImplicationChecksByTransitivity, 1381.2ms TimeCoverageRelationStatistics Valid=612, Invalid=4218, Unknown=0, NotChecked=0, Total=4830 [2021-05-03 15:37:09,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1280 states. [2021-05-03 15:37:09,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1280 to 707. [2021-05-03 15:37:09,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 707 states, 706 states have (on average 2.3427762039660056) internal successors, (1654), 706 states have internal predecessors, (1654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:37:09,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 1654 transitions. [2021-05-03 15:37:09,682 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 1654 transitions. Word has length 35 [2021-05-03 15:37:09,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:37:09,683 INFO L480 AbstractCegarLoop]: Abstraction has 707 states and 1654 transitions. [2021-05-03 15:37:09,683 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:37:09,683 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 1654 transitions. [2021-05-03 15:37:09,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-03 15:37:09,684 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:37:09,684 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:37:09,900 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-05-03 15:37:09,901 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:37:09,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:37:09,901 INFO L82 PathProgramCache]: Analyzing trace with hash -959485263, now seen corresponding path program 26 times [2021-05-03 15:37:09,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:37:09,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643598621] [2021-05-03 15:37:09,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:37:09,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:37:10,042 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:37:10,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643598621] [2021-05-03 15:37:10,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213615902] [2021-05-03 15:37:10,043 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 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 [2021-05-03 15:37:10,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:37:10,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:37:10,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-03 15:37:10,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:37:10,397 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:37:10,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:37:10,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-05-03 15:37:10,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607733426] [2021-05-03 15:37:10,398 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 15:37:10,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:37:10,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 15:37:10,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-05-03 15:37:10,399 INFO L87 Difference]: Start difference. First operand 707 states and 1654 transitions. Second operand has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:37:12,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:37:12,337 INFO L93 Difference]: Finished difference Result 2198 states and 4644 transitions. [2021-05-03 15:37:12,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-03 15:37:12,337 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-03 15:37:12,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:37:12,346 INFO L225 Difference]: With dead ends: 2198 [2021-05-03 15:37:12,347 INFO L226 Difference]: Without dead ends: 2174 [2021-05-03 15:37:12,348 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1896 ImplicationChecksByTransitivity, 1448.7ms TimeCoverageRelationStatistics Valid=967, Invalid=5353, Unknown=0, NotChecked=0, Total=6320 [2021-05-03 15:37:12,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2174 states. [2021-05-03 15:37:12,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2174 to 830. [2021-05-03 15:37:12,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 2.365500603136309) internal successors, (1961), 829 states have internal predecessors, (1961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:37:12,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 1961 transitions. [2021-05-03 15:37:12,375 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 1961 transitions. Word has length 35 [2021-05-03 15:37:12,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:37:12,375 INFO L480 AbstractCegarLoop]: Abstraction has 830 states and 1961 transitions. [2021-05-03 15:37:12,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:37:12,375 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 1961 transitions. [2021-05-03 15:37:12,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-03 15:37:12,378 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:37:12,378 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:37:12,592 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-05-03 15:37:12,593 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:37:12,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:37:12,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1689851173, now seen corresponding path program 27 times [2021-05-03 15:37:12,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:37:12,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684695454] [2021-05-03 15:37:12,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:37:12,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:37:12,748 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:37:12,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684695454] [2021-05-03 15:37:12,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497240280] [2021-05-03 15:37:12,749 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 [2021-05-03 15:37:12,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-05-03 15:37:12,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:37:12,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-03 15:37:12,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:37:13,097 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:37:13,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:37:13,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 26 [2021-05-03 15:37:13,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968968050] [2021-05-03 15:37:13,098 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 15:37:13,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:37:13,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 15:37:13,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2021-05-03 15:37:13,099 INFO L87 Difference]: Start difference. First operand 830 states and 1961 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:37:13,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:37:13,861 INFO L93 Difference]: Finished difference Result 1909 states and 4177 transitions. [2021-05-03 15:37:13,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 15:37:13,861 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-03 15:37:13,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:37:13,867 INFO L225 Difference]: With dead ends: 1909 [2021-05-03 15:37:13,868 INFO L226 Difference]: Without dead ends: 1905 [2021-05-03 15:37:13,868 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 712.4ms TimeCoverageRelationStatistics Valid=348, Invalid=1632, Unknown=0, NotChecked=0, Total=1980 [2021-05-03 15:37:13,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1905 states. [2021-05-03 15:37:13,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1905 to 891. [2021-05-03 15:37:13,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 890 states have (on average 2.344943820224719) internal successors, (2087), 890 states have internal predecessors, (2087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:37:13,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 2087 transitions. [2021-05-03 15:37:13,889 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 2087 transitions. Word has length 35 [2021-05-03 15:37:13,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:37:13,889 INFO L480 AbstractCegarLoop]: Abstraction has 891 states and 2087 transitions. [2021-05-03 15:37:13,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:37:13,890 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 2087 transitions. [2021-05-03 15:37:13,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-03 15:37:13,891 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:37:13,891 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:37:14,104 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-05-03 15:37:14,105 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:37:14,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:37:14,105 INFO L82 PathProgramCache]: Analyzing trace with hash -2112206539, now seen corresponding path program 28 times [2021-05-03 15:37:14,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:37:14,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9551730] [2021-05-03 15:37:14,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:37:14,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:37:14,225 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:37:14,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9551730] [2021-05-03 15:37:14,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621320580] [2021-05-03 15:37:14,225 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:37:14,251 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:37:14,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:37:14,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-03 15:37:14,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:37:14,541 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:37:14,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:37:14,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-05-03 15:37:14,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454874087] [2021-05-03 15:37:14,543 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-03 15:37:14,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:37:14,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-03 15:37:14,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2021-05-03 15:37:14,544 INFO L87 Difference]: Start difference. First operand 891 states and 2087 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:37:16,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:37:16,540 INFO L93 Difference]: Finished difference Result 2946 states and 6225 transitions. [2021-05-03 15:37:16,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-03 15:37:16,540 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-03 15:37:16,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:37:16,547 INFO L225 Difference]: With dead ends: 2946 [2021-05-03 15:37:16,547 INFO L226 Difference]: Without dead ends: 2850 [2021-05-03 15:37:16,548 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2239 ImplicationChecksByTransitivity, 1550.7ms TimeCoverageRelationStatistics Valid=1231, Invalid=5741, Unknown=0, NotChecked=0, Total=6972 [2021-05-03 15:37:16,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2850 states. [2021-05-03 15:37:16,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2850 to 850. [2021-05-03 15:37:16,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 850 states, 849 states have (on average 2.3568904593639575) internal successors, (2001), 849 states have internal predecessors, (2001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:37:16,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 2001 transitions. [2021-05-03 15:37:16,575 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 2001 transitions. Word has length 35 [2021-05-03 15:37:16,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:37:16,575 INFO L480 AbstractCegarLoop]: Abstraction has 850 states and 2001 transitions. [2021-05-03 15:37:16,575 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:37:16,575 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 2001 transitions. [2021-05-03 15:37:16,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-03 15:37:16,577 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:37:16,577 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:37:16,797 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-05-03 15:37:16,797 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:37:16,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:37:16,798 INFO L82 PathProgramCache]: Analyzing trace with hash -102132551, now seen corresponding path program 29 times [2021-05-03 15:37:16,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:37:16,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922027130] [2021-05-03 15:37:16,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:37:16,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:37:16,925 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:37:16,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922027130] [2021-05-03 15:37:16,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209048214] [2021-05-03 15:37:16,926 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 [2021-05-03 15:37:16,961 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 15:37:16,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:37:16,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 15:37:16,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:37:17,316 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:37:17,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:37:17,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-05-03 15:37:17,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378458487] [2021-05-03 15:37:17,317 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-03 15:37:17,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:37:17,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-03 15:37:17,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2021-05-03 15:37:17,318 INFO L87 Difference]: Start difference. First operand 850 states and 2001 transitions. Second operand has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:37:19,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:37:19,191 INFO L93 Difference]: Finished difference Result 3270 states and 6974 transitions. [2021-05-03 15:37:19,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-05-03 15:37:19,192 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-03 15:37:19,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:37:19,199 INFO L225 Difference]: With dead ends: 3270 [2021-05-03 15:37:19,199 INFO L226 Difference]: Without dead ends: 3096 [2021-05-03 15:37:19,200 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2431 ImplicationChecksByTransitivity, 1579.3ms TimeCoverageRelationStatistics Valid=1489, Invalid=5993, Unknown=0, NotChecked=0, Total=7482 [2021-05-03 15:37:19,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3096 states. [2021-05-03 15:37:19,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3096 to 889. [2021-05-03 15:37:19,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 888 states have (on average 2.2905405405405403) internal successors, (2034), 888 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:37:19,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 2034 transitions. [2021-05-03 15:37:19,233 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 2034 transitions. Word has length 35 [2021-05-03 15:37:19,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:37:19,233 INFO L480 AbstractCegarLoop]: Abstraction has 889 states and 2034 transitions. [2021-05-03 15:37:19,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:37:19,233 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 2034 transitions. [2021-05-03 15:37:19,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-03 15:37:19,235 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:37:19,236 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:37:19,447 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-05-03 15:37:19,448 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:37:19,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:37:19,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1129387925, now seen corresponding path program 30 times [2021-05-03 15:37:19,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:37:19,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737279645] [2021-05-03 15:37:19,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:37:19,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:37:19,561 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 13 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:37:19,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737279645] [2021-05-03 15:37:19,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786490863] [2021-05-03 15:37:19,561 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 [2021-05-03 15:37:19,587 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-05-03 15:37:19,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:37:19,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 15:37:19,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:37:19,938 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 13 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:37:19,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:37:19,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-05-03 15:37:19,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912020337] [2021-05-03 15:37:19,939 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 15:37:19,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:37:19,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 15:37:19,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2021-05-03 15:37:19,941 INFO L87 Difference]: Start difference. First operand 889 states and 2034 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:37:21,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:37:21,509 INFO L93 Difference]: Finished difference Result 2421 states and 5273 transitions. [2021-05-03 15:37:21,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-03 15:37:21,510 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-05-03 15:37:21,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:37:21,515 INFO L225 Difference]: With dead ends: 2421 [2021-05-03 15:37:21,515 INFO L226 Difference]: Without dead ends: 2417 [2021-05-03 15:37:21,516 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1867 ImplicationChecksByTransitivity, 1442.1ms TimeCoverageRelationStatistics Valid=1155, Invalid=4851, Unknown=0, NotChecked=0, Total=6006 [2021-05-03 15:37:21,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2417 states. [2021-05-03 15:37:21,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2417 to 742. [2021-05-03 15:37:21,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 741 states have (on average 2.2672064777327936) internal successors, (1680), 741 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:37:21,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 1680 transitions. [2021-05-03 15:37:21,538 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 1680 transitions. Word has length 35 [2021-05-03 15:37:21,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:37:21,538 INFO L480 AbstractCegarLoop]: Abstraction has 742 states and 1680 transitions. [2021-05-03 15:37:21,538 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:37:21,538 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 1680 transitions. [2021-05-03 15:37:21,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-03 15:37:21,540 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:37:21,540 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:37:21,753 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:37:21,753 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:37:21,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:37:21,754 INFO L82 PathProgramCache]: Analyzing trace with hash -826718247, now seen corresponding path program 31 times [2021-05-03 15:37:21,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:37:21,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209986310] [2021-05-03 15:37:21,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:37:21,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:37:21,899 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:37:21,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209986310] [2021-05-03 15:37:21,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933910738] [2021-05-03 15:37:21,900 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 [2021-05-03 15:37:21,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:37:21,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 15:37:21,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:37:22,301 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:37:22,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:37:22,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-05-03 15:37:22,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68857189] [2021-05-03 15:37:22,303 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-03 15:37:22,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:37:22,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-03 15:37:22,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=797, Unknown=0, NotChecked=0, Total=992 [2021-05-03 15:37:22,304 INFO L87 Difference]: Start difference. First operand 742 states and 1680 transitions. Second operand has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:37:24,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:37:24,285 INFO L93 Difference]: Finished difference Result 1553 states and 3227 transitions. [2021-05-03 15:37:24,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-03 15:37:24,285 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have 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 [2021-05-03 15:37:24,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:37:24,289 INFO L225 Difference]: With dead ends: 1553 [2021-05-03 15:37:24,289 INFO L226 Difference]: Without dead ends: 1445 [2021-05-03 15:37:24,290 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2584 ImplicationChecksByTransitivity, 1699.7ms TimeCoverageRelationStatistics Valid=2214, Invalid=6342, Unknown=0, NotChecked=0, Total=8556 [2021-05-03 15:37:24,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1445 states. [2021-05-03 15:37:24,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1445 to 749. [2021-05-03 15:37:24,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 748 states have (on average 2.2553475935828877) internal successors, (1687), 748 states have internal predecessors, (1687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:37:24,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 1687 transitions. [2021-05-03 15:37:24,304 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 1687 transitions. Word has length 37 [2021-05-03 15:37:24,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:37:24,304 INFO L480 AbstractCegarLoop]: Abstraction has 749 states and 1687 transitions. [2021-05-03 15:37:24,305 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:37:24,305 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 1687 transitions. [2021-05-03 15:37:24,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-03 15:37:24,306 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:37:24,306 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:37:24,525 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:37:24,526 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:37:24,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:37:24,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1330775973, now seen corresponding path program 32 times [2021-05-03 15:37:24,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:37:24,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367815368] [2021-05-03 15:37:24,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:37:24,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:37:24,601 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:37:24,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367815368] [2021-05-03 15:37:24,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121385667] [2021-05-03 15:37:24,602 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) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:37:24,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:37:24,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:37:24,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 15:37:24,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:37:24,932 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:37:24,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:37:24,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16] total 24 [2021-05-03 15:37:24,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791856394] [2021-05-03 15:37:24,933 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 15:37:24,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:37:24,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 15:37:24,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2021-05-03 15:37:24,934 INFO L87 Difference]: Start difference. First operand 749 states and 1687 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:37:26,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:37:26,614 INFO L93 Difference]: Finished difference Result 1245 states and 2647 transitions. [2021-05-03 15:37:26,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-03 15:37:26,615 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-03 15:37:26,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:37:26,617 INFO L225 Difference]: With dead ends: 1245 [2021-05-03 15:37:26,617 INFO L226 Difference]: Without dead ends: 1241 [2021-05-03 15:37:26,618 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2330 ImplicationChecksByTransitivity, 1553.2ms TimeCoverageRelationStatistics Valid=1742, Invalid=5568, Unknown=0, NotChecked=0, Total=7310 [2021-05-03 15:37:26,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1241 states. [2021-05-03 15:37:26,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1241 to 749. [2021-05-03 15:37:26,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 748 states have (on average 2.2540106951871657) internal successors, (1686), 748 states have internal predecessors, (1686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:37:26,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 1686 transitions. [2021-05-03 15:37:26,632 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 1686 transitions. Word has length 37 [2021-05-03 15:37:26,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:37:26,632 INFO L480 AbstractCegarLoop]: Abstraction has 749 states and 1686 transitions. [2021-05-03 15:37:26,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:37:26,632 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 1686 transitions. [2021-05-03 15:37:26,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 15:37:26,633 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:37:26,633 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:37:26,837 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-05-03 15:37:26,837 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:37:26,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:37:26,837 INFO L82 PathProgramCache]: Analyzing trace with hash -829971433, now seen corresponding path program 33 times [2021-05-03 15:37:26,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:37:26,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434387127] [2021-05-03 15:37:26,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:37:26,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:37:26,938 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 1 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:37:26,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434387127] [2021-05-03 15:37:26,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409016164] [2021-05-03 15:37:26,938 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) [2021-05-03 15:37:26,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-03 15:37:26,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:37:26,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 15:37:26,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:37:27,103 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 9 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:37:27,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:37:27,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 15 [2021-05-03 15:37:27,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910177779] [2021-05-03 15:37:27,104 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 15:37:27,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:37:27,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 15:37:27,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-05-03 15:37:27,105 INFO L87 Difference]: Start difference. First operand 749 states and 1686 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:37:27,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:37:27,266 INFO L93 Difference]: Finished difference Result 1189 states and 2590 transitions. [2021-05-03 15:37:27,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 15:37:27,267 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-05-03 15:37:27,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:37:27,269 INFO L225 Difference]: With dead ends: 1189 [2021-05-03 15:37:27,269 INFO L226 Difference]: Without dead ends: 1129 [2021-05-03 15:37:27,270 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 159.5ms TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-05-03 15:37:27,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1129 states. [2021-05-03 15:37:27,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1129 to 895. [2021-05-03 15:37:27,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 894 states have (on average 2.2740492170022373) internal successors, (2033), 894 states have internal predecessors, (2033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:37:27,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 2033 transitions. [2021-05-03 15:37:27,285 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 2033 transitions. Word has length 39 [2021-05-03 15:37:27,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:37:27,285 INFO L480 AbstractCegarLoop]: Abstraction has 895 states and 2033 transitions. [2021-05-03 15:37:27,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:37:27,285 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 2033 transitions. [2021-05-03 15:37:27,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 15:37:27,286 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:37:27,286 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:37:27,500 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:37:27,501 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:37:27,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:37:27,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1873377773, now seen corresponding path program 34 times [2021-05-03 15:37:27,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:37:27,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165182665] [2021-05-03 15:37:27,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:37:27,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:37:27,647 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:37:27,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165182665] [2021-05-03 15:37:27,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513580731] [2021-05-03 15:37:27,647 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 [2021-05-03 15:37:27,714 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:37:27,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:37:27,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-03 15:37:27,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:37:28,138 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:37:28,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:37:28,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 30 [2021-05-03 15:37:28,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002078286] [2021-05-03 15:37:28,139 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-03 15:37:28,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:37:28,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-03 15:37:28,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=801, Unknown=0, NotChecked=0, Total=930 [2021-05-03 15:37:28,140 INFO L87 Difference]: Start difference. First operand 895 states and 2033 transitions. Second operand has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 30 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:37:31,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:37:31,167 INFO L93 Difference]: Finished difference Result 2570 states and 5296 transitions. [2021-05-03 15:37:31,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-05-03 15:37:31,168 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 30 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have 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 [2021-05-03 15:37:31,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:37:31,176 INFO L225 Difference]: With dead ends: 2570 [2021-05-03 15:37:31,177 INFO L226 Difference]: Without dead ends: 2546 [2021-05-03 15:37:31,177 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2814 ImplicationChecksByTransitivity, 2043.4ms TimeCoverageRelationStatistics Valid=1214, Invalid=7906, Unknown=0, NotChecked=0, Total=9120 [2021-05-03 15:37:31,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2546 states. [2021-05-03 15:37:31,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2546 to 837. [2021-05-03 15:37:31,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 836 states have (on average 2.271531100478469) internal successors, (1899), 836 states have internal predecessors, (1899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:37:31,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 1899 transitions. [2021-05-03 15:37:31,211 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 1899 transitions. Word has length 39 [2021-05-03 15:37:31,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:37:31,211 INFO L480 AbstractCegarLoop]: Abstraction has 837 states and 1899 transitions. [2021-05-03 15:37:31,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 30 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:37:31,211 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 1899 transitions. [2021-05-03 15:37:31,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 15:37:31,213 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:37:31,213 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:37:31,428 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-05-03 15:37:31,429 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:37:31,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:37:31,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1143011863, now seen corresponding path program 35 times [2021-05-03 15:37:31,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:37:31,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057229219] [2021-05-03 15:37:31,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:37:31,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:37:31,569 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 11 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:37:31,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057229219] [2021-05-03 15:37:31,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372104644] [2021-05-03 15:37:31,570 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 [2021-05-03 15:37:31,601 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-05-03 15:37:31,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:37:31,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-03 15:37:31,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:37:32,016 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 11 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:37:32,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:37:32,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 29 [2021-05-03 15:37:32,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056336050] [2021-05-03 15:37:32,016 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-03 15:37:32,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:37:32,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-03 15:37:32,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2021-05-03 15:37:32,017 INFO L87 Difference]: Start difference. First operand 837 states and 1899 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:37:34,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:37:34,428 INFO L93 Difference]: Finished difference Result 1954 states and 4095 transitions. [2021-05-03 15:37:34,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-03 15:37:34,428 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have 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 [2021-05-03 15:37:34,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:37:34,432 INFO L225 Difference]: With dead ends: 1954 [2021-05-03 15:37:34,432 INFO L226 Difference]: Without dead ends: 1950 [2021-05-03 15:37:34,433 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2062 ImplicationChecksByTransitivity, 1780.1ms TimeCoverageRelationStatistics Valid=923, Invalid=6217, Unknown=0, NotChecked=0, Total=7140 [2021-05-03 15:37:34,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1950 states. [2021-05-03 15:37:34,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1950 to 716. [2021-05-03 15:37:34,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 2.2545454545454544) internal successors, (1612), 715 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:37:34,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1612 transitions. [2021-05-03 15:37:34,453 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1612 transitions. Word has length 39 [2021-05-03 15:37:34,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:37:34,454 INFO L480 AbstractCegarLoop]: Abstraction has 716 states and 1612 transitions. [2021-05-03 15:37:34,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:37:34,454 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1612 transitions. [2021-05-03 15:37:34,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 15:37:34,455 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:37:34,455 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:37:34,668 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:37:34,669 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:37:34,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:37:34,669 INFO L82 PathProgramCache]: Analyzing trace with hash -65410959, now seen corresponding path program 36 times [2021-05-03 15:37:34,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:37:34,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207830956] [2021-05-03 15:37:34,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:37:34,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:37:34,850 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 2 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:37:34,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207830956] [2021-05-03 15:37:34,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871405943] [2021-05-03 15:37:34,850 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 [2021-05-03 15:37:34,878 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-05-03 15:37:34,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:37:34,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-03 15:37:34,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:37:35,310 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 2 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:37:35,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:37:35,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-05-03 15:37:35,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542739415] [2021-05-03 15:37:35,311 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-03 15:37:35,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:37:35,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-03 15:37:35,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=853, Unknown=0, NotChecked=0, Total=992 [2021-05-03 15:37:35,311 INFO L87 Difference]: Start difference. First operand 716 states and 1612 transitions. Second operand has 32 states, 32 states have (on average 2.28125) internal successors, (73), 31 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:37:38,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:37:38,531 INFO L93 Difference]: Finished difference Result 3253 states and 6664 transitions. [2021-05-03 15:37:38,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-05-03 15:37:38,532 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 31 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have 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 [2021-05-03 15:37:38,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:37:38,536 INFO L225 Difference]: With dead ends: 3253 [2021-05-03 15:37:38,537 INFO L226 Difference]: Without dead ends: 3205 [2021-05-03 15:37:38,537 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3598 ImplicationChecksByTransitivity, 2455.3ms TimeCoverageRelationStatistics Valid=1716, Invalid=9204, Unknown=0, NotChecked=0, Total=10920 [2021-05-03 15:37:38,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3205 states. [2021-05-03 15:37:38,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3205 to 718. [2021-05-03 15:37:38,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 717 states have (on average 2.2538354253835426) internal successors, (1616), 717 states have internal predecessors, (1616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:37:38,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 1616 transitions. [2021-05-03 15:37:38,560 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 1616 transitions. Word has length 39 [2021-05-03 15:37:38,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:37:38,560 INFO L480 AbstractCegarLoop]: Abstraction has 718 states and 1616 transitions. [2021-05-03 15:37:38,560 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 31 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:37:38,561 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 1616 transitions. [2021-05-03 15:37:38,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 15:37:38,561 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:37:38,561 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:37:38,777 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-05-03 15:37:38,777 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:37:38,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:37:38,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1846885387, now seen corresponding path program 37 times [2021-05-03 15:37:38,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:37:38,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987627789] [2021-05-03 15:37:38,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:37:38,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:37:38,937 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:37:38,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987627789] [2021-05-03 15:37:38,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407013382] [2021-05-03 15:37:38,937 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 [2021-05-03 15:37:38,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:37:38,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 15:37:38,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:37:39,370 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:37:39,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:37:39,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-05-03 15:37:39,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781608859] [2021-05-03 15:37:39,371 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-03 15:37:39,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:37:39,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-03 15:37:39,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 15:37:39,372 INFO L87 Difference]: Start difference. First operand 718 states and 1616 transitions. Second operand has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:37:41,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:37:41,804 INFO L93 Difference]: Finished difference Result 4064 states and 8310 transitions. [2021-05-03 15:37:41,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-03 15:37:41,805 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have 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 [2021-05-03 15:37:41,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:37:41,810 INFO L225 Difference]: With dead ends: 4064 [2021-05-03 15:37:41,810 INFO L226 Difference]: Without dead ends: 3938 [2021-05-03 15:37:41,811 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2889 ImplicationChecksByTransitivity, 1894.3ms TimeCoverageRelationStatistics Valid=1522, Invalid=7220, Unknown=0, NotChecked=0, Total=8742 [2021-05-03 15:37:41,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3938 states. [2021-05-03 15:37:41,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3938 to 864. [2021-05-03 15:37:41,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 863 states have (on average 2.275782155272306) internal successors, (1964), 863 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) [2021-05-03 15:37:41,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 1964 transitions. [2021-05-03 15:37:41,838 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 1964 transitions. Word has length 39 [2021-05-03 15:37:41,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:37:41,838 INFO L480 AbstractCegarLoop]: Abstraction has 864 states and 1964 transitions. [2021-05-03 15:37:41,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:37:41,838 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 1964 transitions. [2021-05-03 15:37:41,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 15:37:41,839 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:37:41,839 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:37:42,052 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-05-03 15:37:42,053 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:37:42,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:37:42,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1920611207, now seen corresponding path program 38 times [2021-05-03 15:37:42,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:37:42,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421137999] [2021-05-03 15:37:42,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:37:42,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:37:42,210 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:37:42,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421137999] [2021-05-03 15:37:42,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946301848] [2021-05-03 15:37:42,210 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) [2021-05-03 15:37:42,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:37:42,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:37:42,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 15:37:42,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:37:42,652 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:37:42,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:37:42,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-05-03 15:37:42,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219625273] [2021-05-03 15:37:42,653 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-03 15:37:42,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:37:42,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-03 15:37:42,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1009, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 15:37:42,653 INFO L87 Difference]: Start difference. First operand 864 states and 1964 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:37:45,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:37:45,289 INFO L93 Difference]: Finished difference Result 4076 states and 8364 transitions. [2021-05-03 15:37:45,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-05-03 15:37:45,290 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have 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 [2021-05-03 15:37:45,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:37:45,296 INFO L225 Difference]: With dead ends: 4076 [2021-05-03 15:37:45,296 INFO L226 Difference]: Without dead ends: 3776 [2021-05-03 15:37:45,297 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3864 ImplicationChecksByTransitivity, 2245.0ms TimeCoverageRelationStatistics Valid=2308, Invalid=9248, Unknown=0, NotChecked=0, Total=11556 [2021-05-03 15:37:45,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3776 states. [2021-05-03 15:37:45,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3776 to 858. [2021-05-03 15:37:45,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 857 states have (on average 2.2602100350058345) internal successors, (1937), 857 states have internal predecessors, (1937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:37:45,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 1937 transitions. [2021-05-03 15:37:45,321 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 1937 transitions. Word has length 39 [2021-05-03 15:37:45,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:37:45,321 INFO L480 AbstractCegarLoop]: Abstraction has 858 states and 1937 transitions. [2021-05-03 15:37:45,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:37:45,322 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 1937 transitions. [2021-05-03 15:37:45,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 15:37:45,323 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:37:45,323 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:37:45,537 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:37:45,537 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:37:45,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:37:45,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1859314999, now seen corresponding path program 39 times [2021-05-03 15:37:45,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:37:45,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165009218] [2021-05-03 15:37:45,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:37:45,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:37:45,652 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 27 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:37:45,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165009218] [2021-05-03 15:37:45,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866413668] [2021-05-03 15:37:45,653 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 [2021-05-03 15:37:45,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-05-03 15:37:45,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:37:45,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-03 15:37:45,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:37:46,115 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 27 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:37:46,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:37:46,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18] total 28 [2021-05-03 15:37:46,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143573153] [2021-05-03 15:37:46,116 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-03 15:37:46,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:37:46,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-03 15:37:46,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2021-05-03 15:37:46,116 INFO L87 Difference]: Start difference. First operand 858 states and 1937 transitions. Second operand has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:37:49,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:37:49,235 INFO L93 Difference]: Finished difference Result 2927 states and 6237 transitions. [2021-05-03 15:37:49,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-05-03 15:37:49,236 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have 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 [2021-05-03 15:37:49,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:37:49,262 INFO L225 Difference]: With dead ends: 2927 [2021-05-03 15:37:49,263 INFO L226 Difference]: Without dead ends: 2923 [2021-05-03 15:37:49,264 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5275 ImplicationChecksByTransitivity, 2833.2ms TimeCoverageRelationStatistics Valid=3131, Invalid=11149, Unknown=0, NotChecked=0, Total=14280 [2021-05-03 15:37:49,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2923 states. [2021-05-03 15:37:49,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2923 to 1133. [2021-05-03 15:37:49,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1133 states, 1132 states have (on average 2.325088339222615) internal successors, (2632), 1132 states have internal predecessors, (2632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:37:49,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1133 states to 1133 states and 2632 transitions. [2021-05-03 15:37:49,295 INFO L78 Accepts]: Start accepts. Automaton has 1133 states and 2632 transitions. Word has length 39 [2021-05-03 15:37:49,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:37:49,296 INFO L480 AbstractCegarLoop]: Abstraction has 1133 states and 2632 transitions. [2021-05-03 15:37:49,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:37:49,296 INFO L276 IsEmpty]: Start isEmpty. Operand 1133 states and 2632 transitions. [2021-05-03 15:37:49,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-03 15:37:49,298 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:37:49,298 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:37:49,517 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:37:49,517 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:37:49,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:37:49,520 INFO L82 PathProgramCache]: Analyzing trace with hash -605917803, now seen corresponding path program 40 times [2021-05-03 15:37:49,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:37:49,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693731988] [2021-05-03 15:37:49,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:37:49,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:37:49,726 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:37:49,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693731988] [2021-05-03 15:37:49,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160612609] [2021-05-03 15:37:49,726 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 [2021-05-03 15:37:49,754 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:37:49,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:37:49,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-03 15:37:49,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:37:50,228 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:37:50,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:37:50,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2021-05-03 15:37:50,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416366541] [2021-05-03 15:37:50,229 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-03 15:37:50,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:37:50,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-03 15:37:50,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=1018, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 15:37:50,229 INFO L87 Difference]: Start difference. First operand 1133 states and 2632 transitions. Second operand has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:37:53,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:37:53,153 INFO L93 Difference]: Finished difference Result 2199 states and 4675 transitions. [2021-05-03 15:37:53,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-05-03 15:37:53,154 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have 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 [2021-05-03 15:37:53,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:37:53,157 INFO L225 Difference]: With dead ends: 2199 [2021-05-03 15:37:53,157 INFO L226 Difference]: Without dead ends: 2049 [2021-05-03 15:37:53,158 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4141 ImplicationChecksByTransitivity, 2452.2ms TimeCoverageRelationStatistics Valid=3335, Invalid=9547, Unknown=0, NotChecked=0, Total=12882 [2021-05-03 15:37:53,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2049 states. [2021-05-03 15:37:53,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2049 to 1138. [2021-05-03 15:37:53,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1138 states, 1137 states have (on average 2.3157431838170623) internal successors, (2633), 1137 states have internal predecessors, (2633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:37:53,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1138 states to 1138 states and 2633 transitions. [2021-05-03 15:37:53,177 INFO L78 Accepts]: Start accepts. Automaton has 1138 states and 2633 transitions. Word has length 41 [2021-05-03 15:37:53,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:37:53,177 INFO L480 AbstractCegarLoop]: Abstraction has 1138 states and 2633 transitions. [2021-05-03 15:37:53,178 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:37:53,178 INFO L276 IsEmpty]: Start isEmpty. Operand 1138 states and 2633 transitions. [2021-05-03 15:37:53,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-03 15:37:53,179 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:37:53,179 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:37:53,397 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:37:53,398 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:37:53,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:37:53,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1410601563, now seen corresponding path program 41 times [2021-05-03 15:37:53,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:37:53,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254232436] [2021-05-03 15:37:53,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:37:53,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:37:53,507 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:37:53,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254232436] [2021-05-03 15:37:53,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606279582] [2021-05-03 15:37:53,507 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 [2021-05-03 15:37:53,537 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-05-03 15:37:53,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:37:53,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-03 15:37:53,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:37:54,000 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:37:54,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:37:54,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 19] total 28 [2021-05-03 15:37:54,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812142249] [2021-05-03 15:37:54,001 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-03 15:37:54,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:37:54,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-03 15:37:54,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2021-05-03 15:37:54,001 INFO L87 Difference]: Start difference. First operand 1138 states and 2633 transitions. Second operand has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:37:58,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:37:58,595 INFO L93 Difference]: Finished difference Result 1915 states and 4151 transitions. [2021-05-03 15:37:58,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-05-03 15:37:58,595 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have 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 [2021-05-03 15:37:58,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:37:58,598 INFO L225 Difference]: With dead ends: 1915 [2021-05-03 15:37:58,598 INFO L226 Difference]: Without dead ends: 1911 [2021-05-03 15:37:58,600 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8672 ImplicationChecksByTransitivity, 4246.1ms TimeCoverageRelationStatistics Valid=4990, Invalid=17062, Unknown=0, NotChecked=0, Total=22052 [2021-05-03 15:37:58,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1911 states. [2021-05-03 15:37:58,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1911 to 1114. [2021-05-03 15:37:58,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1114 states, 1113 states have (on average 2.321653189577718) internal successors, (2584), 1113 states have internal predecessors, (2584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:37:58,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 2584 transitions. [2021-05-03 15:37:58,624 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 2584 transitions. Word has length 41 [2021-05-03 15:37:58,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:37:58,624 INFO L480 AbstractCegarLoop]: Abstraction has 1114 states and 2584 transitions. [2021-05-03 15:37:58,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:37:58,625 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 2584 transitions. [2021-05-03 15:37:58,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-03 15:37:58,627 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:37:58,627 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:37:58,827 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-05-03 15:37:58,828 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:37:58,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:37:58,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1582316395, now seen corresponding path program 42 times [2021-05-03 15:37:58,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:37:58,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577730090] [2021-05-03 15:37:58,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:37:58,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:37:58,955 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 25 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 15:37:58,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577730090] [2021-05-03 15:37:58,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750328572] [2021-05-03 15:37:58,956 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) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:37:59,000 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-05-03 15:37:59,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:37:59,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-03 15:37:59,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:37:59,550 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 25 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:37:59,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:37:59,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 29 [2021-05-03 15:37:59,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787823316] [2021-05-03 15:37:59,551 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-03 15:37:59,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:37:59,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-03 15:37:59,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=706, Unknown=0, NotChecked=0, Total=870 [2021-05-03 15:37:59,552 INFO L87 Difference]: Start difference. First operand 1114 states and 2584 transitions. Second operand has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:38:02,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:38:02,350 INFO L93 Difference]: Finished difference Result 3697 states and 8046 transitions. [2021-05-03 15:38:02,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-05-03 15:38:02,351 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have 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 [2021-05-03 15:38:02,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:38:02,354 INFO L225 Difference]: With dead ends: 3697 [2021-05-03 15:38:02,355 INFO L226 Difference]: Without dead ends: 3697 [2021-05-03 15:38:02,355 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2941 ImplicationChecksByTransitivity, 2548.1ms TimeCoverageRelationStatistics Valid=2386, Invalid=7316, Unknown=0, NotChecked=0, Total=9702 [2021-05-03 15:38:02,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3697 states. [2021-05-03 15:38:02,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3697 to 2061. [2021-05-03 15:38:02,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2061 states, 2060 states have (on average 2.3907766990291264) internal successors, (4925), 2060 states have internal predecessors, (4925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:38:02,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2061 states to 2061 states and 4925 transitions. [2021-05-03 15:38:02,395 INFO L78 Accepts]: Start accepts. Automaton has 2061 states and 4925 transitions. Word has length 41 [2021-05-03 15:38:02,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:38:02,396 INFO L480 AbstractCegarLoop]: Abstraction has 2061 states and 4925 transitions. [2021-05-03 15:38:02,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:38:02,396 INFO L276 IsEmpty]: Start isEmpty. Operand 2061 states and 4925 transitions. [2021-05-03 15:38:02,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-03 15:38:02,399 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:38:02,399 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:38:02,612 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:38:02,613 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:38:02,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:38:02,613 INFO L82 PathProgramCache]: Analyzing trace with hash 905857747, now seen corresponding path program 43 times [2021-05-03 15:38:02,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:38:02,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685289140] [2021-05-03 15:38:02,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:38:02,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:38:02,741 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 1 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:38:02,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685289140] [2021-05-03 15:38:02,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872458929] [2021-05-03 15:38:02,741 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 [2021-05-03 15:38:02,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:38:02,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 15:38:02,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:38:02,883 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:38:02,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:38:02,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-05-03 15:38:02,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210174968] [2021-05-03 15:38:02,884 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 15:38:02,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:38:02,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 15:38:02,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-03 15:38:02,885 INFO L87 Difference]: Start difference. First operand 2061 states and 4925 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:38:03,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:38:03,003 INFO L93 Difference]: Finished difference Result 2922 states and 6927 transitions. [2021-05-03 15:38:03,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 15:38:03,003 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 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 43 [2021-05-03 15:38:03,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:38:03,009 INFO L225 Difference]: With dead ends: 2922 [2021-05-03 15:38:03,009 INFO L226 Difference]: Without dead ends: 2865 [2021-05-03 15:38:03,009 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 100.9ms TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-03 15:38:03,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2865 states. [2021-05-03 15:38:03,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2865 to 2632. [2021-05-03 15:38:03,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2632 states, 2631 states have (on average 2.4401368301026225) internal successors, (6420), 2631 states have internal predecessors, (6420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:38:03,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2632 states to 2632 states and 6420 transitions. [2021-05-03 15:38:03,072 INFO L78 Accepts]: Start accepts. Automaton has 2632 states and 6420 transitions. Word has length 43 [2021-05-03 15:38:03,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:38:03,072 INFO L480 AbstractCegarLoop]: Abstraction has 2632 states and 6420 transitions. [2021-05-03 15:38:03,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:38:03,072 INFO L276 IsEmpty]: Start isEmpty. Operand 2632 states and 6420 transitions. [2021-05-03 15:38:03,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-03 15:38:03,077 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:38:03,077 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:38:03,303 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:38:03,304 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:38:03,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:38:03,304 INFO L82 PathProgramCache]: Analyzing trace with hash -735053015, now seen corresponding path program 44 times [2021-05-03 15:38:03,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:38:03,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738456934] [2021-05-03 15:38:03,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:38:03,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:38:03,558 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:38:03,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738456934] [2021-05-03 15:38:03,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572102035] [2021-05-03 15:38:03,558 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 [2021-05-03 15:38:03,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:38:03,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:38:03,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 15:38:03,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:38:04,291 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:38:04,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:38:04,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 33 [2021-05-03 15:38:04,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777399137] [2021-05-03 15:38:04,292 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-03 15:38:04,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:38:04,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-03 15:38:04,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=978, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 15:38:04,293 INFO L87 Difference]: Start difference. First operand 2632 states and 6420 transitions. Second operand has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:38:08,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:38:08,642 INFO L93 Difference]: Finished difference Result 5778 states and 12992 transitions. [2021-05-03 15:38:08,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-05-03 15:38:08,643 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have 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 [2021-05-03 15:38:08,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:38:08,652 INFO L225 Difference]: With dead ends: 5778 [2021-05-03 15:38:08,652 INFO L226 Difference]: Without dead ends: 5745 [2021-05-03 15:38:08,653 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3923 ImplicationChecksByTransitivity, 3055.4ms TimeCoverageRelationStatistics Valid=1461, Invalid=10971, Unknown=0, NotChecked=0, Total=12432 [2021-05-03 15:38:08,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5745 states. [2021-05-03 15:38:08,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5745 to 2946. [2021-05-03 15:38:08,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2946 states, 2945 states have (on average 2.447198641765705) internal successors, (7207), 2945 states have internal predecessors, (7207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:38:08,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2946 states to 2946 states and 7207 transitions. [2021-05-03 15:38:08,722 INFO L78 Accepts]: Start accepts. Automaton has 2946 states and 7207 transitions. Word has length 43 [2021-05-03 15:38:08,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:38:08,722 INFO L480 AbstractCegarLoop]: Abstraction has 2946 states and 7207 transitions. [2021-05-03 15:38:08,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:38:08,722 INFO L276 IsEmpty]: Start isEmpty. Operand 2946 states and 7207 transitions. [2021-05-03 15:38:08,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-03 15:38:08,726 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:38:08,726 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:38:08,926 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-05-03 15:38:08,927 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:38:08,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:38:08,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1465418925, now seen corresponding path program 45 times [2021-05-03 15:38:08,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:38:08,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320525920] [2021-05-03 15:38:08,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:38:08,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:38:09,132 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 13 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:38:09,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320525920] [2021-05-03 15:38:09,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734399216] [2021-05-03 15:38:09,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:38:09,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-05-03 15:38:09,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:38:09,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 15:38:09,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:38:09,750 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 13 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:38:09,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:38:09,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 20] total 32 [2021-05-03 15:38:09,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865759746] [2021-05-03 15:38:09,751 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-03 15:38:09,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:38:09,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-03 15:38:09,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 15:38:09,752 INFO L87 Difference]: Start difference. First operand 2946 states and 7207 transitions. Second operand has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 32 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:38:13,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:38:13,178 INFO L93 Difference]: Finished difference Result 4729 states and 10915 transitions. [2021-05-03 15:38:13,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-03 15:38:13,179 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 32 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have 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 [2021-05-03 15:38:13,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:38:13,184 INFO L225 Difference]: With dead ends: 4729 [2021-05-03 15:38:13,184 INFO L226 Difference]: Without dead ends: 4725 [2021-05-03 15:38:13,185 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2728 ImplicationChecksByTransitivity, 2492.6ms TimeCoverageRelationStatistics Valid=1085, Invalid=8227, Unknown=0, NotChecked=0, Total=9312 [2021-05-03 15:38:13,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4725 states. [2021-05-03 15:38:13,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4725 to 2852. [2021-05-03 15:38:13,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2852 states, 2851 states have (on average 2.4387934058225182) internal successors, (6953), 2851 states have internal predecessors, (6953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:38:13,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2852 states to 2852 states and 6953 transitions. [2021-05-03 15:38:13,229 INFO L78 Accepts]: Start accepts. Automaton has 2852 states and 6953 transitions. Word has length 43 [2021-05-03 15:38:13,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:38:13,229 INFO L480 AbstractCegarLoop]: Abstraction has 2852 states and 6953 transitions. [2021-05-03 15:38:13,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 32 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:38:13,229 INFO L276 IsEmpty]: Start isEmpty. Operand 2852 states and 6953 transitions. [2021-05-03 15:38:13,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-03 15:38:13,233 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:38:13,233 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:38:13,433 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:38:13,434 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:38:13,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:38:13,434 INFO L82 PathProgramCache]: Analyzing trace with hash 2124544429, now seen corresponding path program 46 times [2021-05-03 15:38:13,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:38:13,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032584127] [2021-05-03 15:38:13,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:38:13,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:38:13,666 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 2 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:38:13,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032584127] [2021-05-03 15:38:13,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694945555] [2021-05-03 15:38:13,667 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) [2021-05-03 15:38:13,699 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:38:13,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:38:13,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 15:38:13,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:38:14,277 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 2 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:38:14,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:38:14,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 34 [2021-05-03 15:38:14,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798636547] [2021-05-03 15:38:14,277 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-03 15:38:14,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:38:14,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-03 15:38:14,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1035, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 15:38:14,278 INFO L87 Difference]: Start difference. First operand 2852 states and 6953 transitions. Second operand has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:38:19,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:38:19,217 INFO L93 Difference]: Finished difference Result 7067 states and 15853 transitions. [2021-05-03 15:38:19,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-05-03 15:38:19,219 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have 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 [2021-05-03 15:38:19,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:38:19,233 INFO L225 Difference]: With dead ends: 7067 [2021-05-03 15:38:19,234 INFO L226 Difference]: Without dead ends: 7019 [2021-05-03 15:38:19,236 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5501 ImplicationChecksByTransitivity, 3594.3ms TimeCoverageRelationStatistics Valid=2247, Invalid=14009, Unknown=0, NotChecked=0, Total=16256 [2021-05-03 15:38:19,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7019 states. [2021-05-03 15:38:19,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7019 to 2694. [2021-05-03 15:38:19,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2694 states, 2693 states have (on average 2.4496843668770887) internal successors, (6597), 2693 states have internal predecessors, (6597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:38:19,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2694 states to 2694 states and 6597 transitions. [2021-05-03 15:38:19,321 INFO L78 Accepts]: Start accepts. Automaton has 2694 states and 6597 transitions. Word has length 43 [2021-05-03 15:38:19,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:38:19,321 INFO L480 AbstractCegarLoop]: Abstraction has 2694 states and 6597 transitions. [2021-05-03 15:38:19,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:38:19,322 INFO L276 IsEmpty]: Start isEmpty. Operand 2694 states and 6597 transitions. [2021-05-03 15:38:19,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-03 15:38:19,327 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:38:19,327 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:38:19,540 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-05-03 15:38:19,541 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:38:19,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:38:19,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1202690767, now seen corresponding path program 47 times [2021-05-03 15:38:19,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:38:19,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358408335] [2021-05-03 15:38:19,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:38:19,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:38:19,758 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 6 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:38:19,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358408335] [2021-05-03 15:38:19,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508205592] [2021-05-03 15:38:19,758 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 [2021-05-03 15:38:19,793 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-05-03 15:38:19,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:38:19,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-03 15:38:19,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:38:20,467 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 6 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:38:20,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:38:20,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20] total 36 [2021-05-03 15:38:20,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793831307] [2021-05-03 15:38:20,468 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-03 15:38:20,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:38:20,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-03 15:38:20,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1153, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 15:38:20,468 INFO L87 Difference]: Start difference. First operand 2694 states and 6597 transitions. Second operand has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 36 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:38:24,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:38:24,359 INFO L93 Difference]: Finished difference Result 8504 states and 18894 transitions. [2021-05-03 15:38:24,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-05-03 15:38:24,360 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 36 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have 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 [2021-05-03 15:38:24,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:38:24,370 INFO L225 Difference]: With dead ends: 8504 [2021-05-03 15:38:24,370 INFO L226 Difference]: Without dead ends: 8375 [2021-05-03 15:38:24,371 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5138 ImplicationChecksByTransitivity, 3192.7ms TimeCoverageRelationStatistics Valid=2380, Invalid=12140, Unknown=0, NotChecked=0, Total=14520 [2021-05-03 15:38:24,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8375 states. [2021-05-03 15:38:24,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8375 to 2690. [2021-05-03 15:38:24,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2690 states, 2689 states have (on average 2.4503532911863144) internal successors, (6589), 2689 states have internal predecessors, (6589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:38:24,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2690 states to 2690 states and 6589 transitions. [2021-05-03 15:38:24,442 INFO L78 Accepts]: Start accepts. Automaton has 2690 states and 6589 transitions. Word has length 43 [2021-05-03 15:38:24,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:38:24,443 INFO L480 AbstractCegarLoop]: Abstraction has 2690 states and 6589 transitions. [2021-05-03 15:38:24,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 36 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:38:24,443 INFO L276 IsEmpty]: Start isEmpty. Operand 2690 states and 6589 transitions. [2021-05-03 15:38:24,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-03 15:38:24,446 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:38:24,446 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:38:24,647 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:38:24,647 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:38:24,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:38:24,647 INFO L82 PathProgramCache]: Analyzing trace with hash -693830219, now seen corresponding path program 48 times [2021-05-03 15:38:24,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:38:24,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674021237] [2021-05-03 15:38:24,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:38:24,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:38:24,870 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 12 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:38:24,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674021237] [2021-05-03 15:38:24,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175484521] [2021-05-03 15:38:24,870 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 [2021-05-03 15:38:24,897 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-05-03 15:38:24,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:38:24,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-03 15:38:24,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:38:25,464 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 12 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:38:25,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:38:25,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 37 [2021-05-03 15:38:25,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136499255] [2021-05-03 15:38:25,465 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-03 15:38:25,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:38:25,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-03 15:38:25,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1209, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 15:38:25,465 INFO L87 Difference]: Start difference. First operand 2690 states and 6589 transitions. Second operand has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:38:29,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:38:29,320 INFO L93 Difference]: Finished difference Result 9110 states and 20113 transitions. [2021-05-03 15:38:29,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-05-03 15:38:29,321 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have 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 [2021-05-03 15:38:29,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:38:29,335 INFO L225 Difference]: With dead ends: 9110 [2021-05-03 15:38:29,335 INFO L226 Difference]: Without dead ends: 8906 [2021-05-03 15:38:29,336 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5558 ImplicationChecksByTransitivity, 3191.7ms TimeCoverageRelationStatistics Valid=2778, Invalid=12474, Unknown=0, NotChecked=0, Total=15252 [2021-05-03 15:38:29,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8906 states. [2021-05-03 15:38:29,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8906 to 2710. [2021-05-03 15:38:29,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2710 states, 2709 states have (on average 2.44702842377261) internal successors, (6629), 2709 states have internal predecessors, (6629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:38:29,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2710 states to 2710 states and 6629 transitions. [2021-05-03 15:38:29,415 INFO L78 Accepts]: Start accepts. Automaton has 2710 states and 6629 transitions. Word has length 43 [2021-05-03 15:38:29,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:38:29,415 INFO L480 AbstractCegarLoop]: Abstraction has 2710 states and 6629 transitions. [2021-05-03 15:38:29,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:38:29,415 INFO L276 IsEmpty]: Start isEmpty. Operand 2710 states and 6629 transitions. [2021-05-03 15:38:29,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-03 15:38:29,418 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:38:29,419 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:38:29,637 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-05-03 15:38:29,637 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:38:29,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:38:29,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1424391367, now seen corresponding path program 49 times [2021-05-03 15:38:29,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:38:29,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101427538] [2021-05-03 15:38:29,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:38:29,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:38:29,911 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 20 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:38:29,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101427538] [2021-05-03 15:38:29,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166071699] [2021-05-03 15:38:29,912 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 [2021-05-03 15:38:29,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:38:29,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 15:38:29,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:38:30,586 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 20 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:38:30,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:38:30,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-05-03 15:38:30,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486761518] [2021-05-03 15:38:30,587 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-03 15:38:30,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:38:30,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-03 15:38:30,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1200, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 15:38:30,588 INFO L87 Difference]: Start difference. First operand 2710 states and 6629 transitions. Second operand has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:38:34,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:38:34,573 INFO L93 Difference]: Finished difference Result 9783 states and 22057 transitions. [2021-05-03 15:38:34,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-05-03 15:38:34,575 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have 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 [2021-05-03 15:38:34,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:38:34,592 INFO L225 Difference]: With dead ends: 9783 [2021-05-03 15:38:34,592 INFO L226 Difference]: Without dead ends: 9369 [2021-05-03 15:38:34,601 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4465 ImplicationChecksByTransitivity, 3417.5ms TimeCoverageRelationStatistics Valid=2685, Invalid=11121, Unknown=0, NotChecked=0, Total=13806 [2021-05-03 15:38:34,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9369 states. [2021-05-03 15:38:34,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9369 to 2859. [2021-05-03 15:38:34,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2859 states, 2858 states have (on average 2.368439468159552) internal successors, (6769), 2858 states have internal predecessors, (6769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:38:34,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2859 states to 2859 states and 6769 transitions. [2021-05-03 15:38:34,689 INFO L78 Accepts]: Start accepts. Automaton has 2859 states and 6769 transitions. Word has length 43 [2021-05-03 15:38:34,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:38:34,689 INFO L480 AbstractCegarLoop]: Abstraction has 2859 states and 6769 transitions. [2021-05-03 15:38:34,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:38:34,690 INFO L276 IsEmpty]: Start isEmpty. Operand 2859 states and 6769 transitions. [2021-05-03 15:38:34,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-03 15:38:34,694 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:38:34,694 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:38:34,908 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:38:34,909 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:38:34,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:38:34,909 INFO L82 PathProgramCache]: Analyzing trace with hash -2075066565, now seen corresponding path program 50 times [2021-05-03 15:38:34,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:38:34,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024037655] [2021-05-03 15:38:34,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:38:34,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:38:35,110 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 38 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:38:35,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024037655] [2021-05-03 15:38:35,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022475542] [2021-05-03 15:38:35,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:38:35,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:38:35,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:38:35,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-03 15:38:35,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:38:35,919 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 38 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:38:35,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:38:35,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 31 [2021-05-03 15:38:35,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618694380] [2021-05-03 15:38:35,920 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-03 15:38:35,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:38:35,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-03 15:38:35,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=812, Unknown=0, NotChecked=0, Total=992 [2021-05-03 15:38:35,921 INFO L87 Difference]: Start difference. First operand 2859 states and 6769 transitions. Second operand has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:38:41,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:38:41,732 INFO L93 Difference]: Finished difference Result 6829 states and 15444 transitions. [2021-05-03 15:38:41,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-05-03 15:38:41,733 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have 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 [2021-05-03 15:38:41,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:38:41,743 INFO L225 Difference]: With dead ends: 6829 [2021-05-03 15:38:41,743 INFO L226 Difference]: Without dead ends: 6825 [2021-05-03 15:38:41,745 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9023 ImplicationChecksByTransitivity, 5241.9ms TimeCoverageRelationStatistics Valid=4987, Invalid=17965, Unknown=0, NotChecked=0, Total=22952 [2021-05-03 15:38:41,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6825 states. [2021-05-03 15:38:41,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6825 to 2962. [2021-05-03 15:38:41,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2962 states, 2961 states have (on average 2.403579871664978) internal successors, (7117), 2961 states have internal predecessors, (7117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:38:41,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2962 states to 2962 states and 7117 transitions. [2021-05-03 15:38:41,807 INFO L78 Accepts]: Start accepts. Automaton has 2962 states and 7117 transitions. Word has length 43 [2021-05-03 15:38:41,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:38:41,808 INFO L480 AbstractCegarLoop]: Abstraction has 2962 states and 7117 transitions. [2021-05-03 15:38:41,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:38:41,808 INFO L276 IsEmpty]: Start isEmpty. Operand 2962 states and 7117 transitions. [2021-05-03 15:38:41,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-03 15:38:41,812 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:38:41,812 INFO L551 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:38:42,024 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:38:42,025 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:38:42,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:38:42,025 INFO L82 PathProgramCache]: Analyzing trace with hash 498869585, now seen corresponding path program 51 times [2021-05-03 15:38:42,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:38:42,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068973148] [2021-05-03 15:38:42,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:38:42,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:38:42,303 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:38:42,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068973148] [2021-05-03 15:38:42,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996184040] [2021-05-03 15:38:42,303 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 [2021-05-03 15:38:42,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-05-03 15:38:42,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:38:42,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-03 15:38:42,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:38:43,132 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:38:43,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:38:43,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 39 [2021-05-03 15:38:43,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912480068] [2021-05-03 15:38:43,133 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-03 15:38:43,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:38:43,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-03 15:38:43,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=1266, Unknown=0, NotChecked=0, Total=1560 [2021-05-03 15:38:43,134 INFO L87 Difference]: Start difference. First operand 2962 states and 7117 transitions. Second operand has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 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) [2021-05-03 15:38:47,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:38:47,615 INFO L93 Difference]: Finished difference Result 4709 states and 10625 transitions. [2021-05-03 15:38:47,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-05-03 15:38:47,616 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 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 [2021-05-03 15:38:47,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:38:47,623 INFO L225 Difference]: With dead ends: 4709 [2021-05-03 15:38:47,623 INFO L226 Difference]: Without dead ends: 4427 [2021-05-03 15:38:47,624 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6158 ImplicationChecksByTransitivity, 4031.7ms TimeCoverageRelationStatistics Valid=4840, Invalid=13792, Unknown=0, NotChecked=0, Total=18632 [2021-05-03 15:38:47,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4427 states. [2021-05-03 15:38:47,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4427 to 2849. [2021-05-03 15:38:47,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2849 states, 2848 states have (on average 2.392205056179775) internal successors, (6813), 2848 states have internal predecessors, (6813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:38:47,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2849 states to 2849 states and 6813 transitions. [2021-05-03 15:38:47,674 INFO L78 Accepts]: Start accepts. Automaton has 2849 states and 6813 transitions. Word has length 45 [2021-05-03 15:38:47,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:38:47,674 INFO L480 AbstractCegarLoop]: Abstraction has 2849 states and 6813 transitions. [2021-05-03 15:38:47,674 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 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) [2021-05-03 15:38:47,674 INFO L276 IsEmpty]: Start isEmpty. Operand 2849 states and 6813 transitions. [2021-05-03 15:38:47,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-03 15:38:47,678 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:38:47,678 INFO L551 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:38:47,897 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:38:47,898 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:38:47,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:38:47,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1866547877, now seen corresponding path program 52 times [2021-05-03 15:38:47,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:38:47,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459740467] [2021-05-03 15:38:47,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:38:47,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:38:48,049 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 57 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:38:48,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459740467] [2021-05-03 15:38:48,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490824843] [2021-05-03 15:38:48,050 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:38:48,077 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:38:48,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:38:48,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 15:38:48,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:38:48,729 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 57 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:38:48,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:38:48,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 20] total 30 [2021-05-03 15:38:48,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719874446] [2021-05-03 15:38:48,730 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-03 15:38:48,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:38:48,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-03 15:38:48,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=726, Unknown=0, NotChecked=0, Total=930 [2021-05-03 15:38:48,731 INFO L87 Difference]: Start difference. First operand 2849 states and 6813 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:38:52,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:38:52,770 INFO L93 Difference]: Finished difference Result 3679 states and 8433 transitions. [2021-05-03 15:38:52,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-05-03 15:38:52,771 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have 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 [2021-05-03 15:38:52,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:38:52,775 INFO L225 Difference]: With dead ends: 3679 [2021-05-03 15:38:52,775 INFO L226 Difference]: Without dead ends: 3675 [2021-05-03 15:38:52,776 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5874 ImplicationChecksByTransitivity, 3846.0ms TimeCoverageRelationStatistics Valid=3813, Invalid=12443, Unknown=0, NotChecked=0, Total=16256 [2021-05-03 15:38:52,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3675 states. [2021-05-03 15:38:52,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3675 to 2849. [2021-05-03 15:38:52,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2849 states, 2848 states have (on average 2.3918539325842696) internal successors, (6812), 2848 states have internal predecessors, (6812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:38:52,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2849 states to 2849 states and 6812 transitions. [2021-05-03 15:38:52,815 INFO L78 Accepts]: Start accepts. Automaton has 2849 states and 6812 transitions. Word has length 45 [2021-05-03 15:38:52,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:38:52,816 INFO L480 AbstractCegarLoop]: Abstraction has 2849 states and 6812 transitions. [2021-05-03 15:38:52,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:38:52,816 INFO L276 IsEmpty]: Start isEmpty. Operand 2849 states and 6812 transitions. [2021-05-03 15:38:52,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-03 15:38:52,820 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:38:52,820 INFO L551 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:38:53,024 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:38:53,025 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:38:53,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:38:53,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1749615503, now seen corresponding path program 53 times [2021-05-03 15:38:53,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:38:53,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287310772] [2021-05-03 15:38:53,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:38:53,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:38:53,203 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 1 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:38:53,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287310772] [2021-05-03 15:38:53,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700016451] [2021-05-03 15:38:53,203 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:38:53,241 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-05-03 15:38:53,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:38:53,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-03 15:38:53,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:38:53,349 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:38:53,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:38:53,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-05-03 15:38:53,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698280894] [2021-05-03 15:38:53,349 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 15:38:53,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:38:53,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 15:38:53,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-05-03 15:38:53,350 INFO L87 Difference]: Start difference. First operand 2849 states and 6812 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:38:53,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:38:53,568 INFO L93 Difference]: Finished difference Result 3813 states and 9018 transitions. [2021-05-03 15:38:53,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 15:38:53,570 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-05-03 15:38:53,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:38:53,575 INFO L225 Difference]: With dead ends: 3813 [2021-05-03 15:38:53,575 INFO L226 Difference]: Without dead ends: 3750 [2021-05-03 15:38:53,576 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 134.0ms TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-05-03 15:38:53,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3750 states. [2021-05-03 15:38:53,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3750 to 3429. [2021-05-03 15:38:53,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3429 states, 3428 states have (on average 2.430571761960327) internal successors, (8332), 3428 states have internal predecessors, (8332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:38:53,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3429 states to 3429 states and 8332 transitions. [2021-05-03 15:38:53,633 INFO L78 Accepts]: Start accepts. Automaton has 3429 states and 8332 transitions. Word has length 47 [2021-05-03 15:38:53,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:38:53,633 INFO L480 AbstractCegarLoop]: Abstraction has 3429 states and 8332 transitions. [2021-05-03 15:38:53,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:38:53,633 INFO L276 IsEmpty]: Start isEmpty. Operand 3429 states and 8332 transitions. [2021-05-03 15:38:53,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-03 15:38:53,638 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:38:53,638 INFO L551 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:38:53,838 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-05-03 15:38:53,839 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:38:53,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:38:53,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1886194913, now seen corresponding path program 54 times [2021-05-03 15:38:53,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:38:53,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899576809] [2021-05-03 15:38:53,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:38:53,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:38:54,274 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:38:54,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899576809] [2021-05-03 15:38:54,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030212635] [2021-05-03 15:38:54,274 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 [2021-05-03 15:38:54,305 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-05-03 15:38:54,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:38:54,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 15:38:54,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:38:54,752 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 2 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:38:54,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:38:54,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 14] total 34 [2021-05-03 15:38:54,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63974644] [2021-05-03 15:38:54,753 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-03 15:38:54,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:38:54,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-03 15:38:54,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=998, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 15:38:54,754 INFO L87 Difference]: Start difference. First operand 3429 states and 8332 transitions. Second operand has 34 states, 34 states have (on average 2.5588235294117645) internal successors, (87), 34 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:38:56,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:38:56,540 INFO L93 Difference]: Finished difference Result 4327 states and 10075 transitions. [2021-05-03 15:38:56,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 15:38:56,541 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.5588235294117645) internal successors, (87), 34 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have 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 [2021-05-03 15:38:56,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:38:56,547 INFO L225 Difference]: With dead ends: 4327 [2021-05-03 15:38:56,548 INFO L226 Difference]: Without dead ends: 4324 [2021-05-03 15:38:56,548 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 716 ImplicationChecksByTransitivity, 1585.4ms TimeCoverageRelationStatistics Valid=403, Invalid=3137, Unknown=0, NotChecked=0, Total=3540 [2021-05-03 15:38:56,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4324 states. [2021-05-03 15:38:56,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4324 to 3396. [2021-05-03 15:38:56,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3396 states, 3395 states have (on average 2.422680412371134) internal successors, (8225), 3395 states have internal predecessors, (8225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:38:56,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3396 states to 3396 states and 8225 transitions. [2021-05-03 15:38:56,603 INFO L78 Accepts]: Start accepts. Automaton has 3396 states and 8225 transitions. Word has length 47 [2021-05-03 15:38:56,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:38:56,603 INFO L480 AbstractCegarLoop]: Abstraction has 3396 states and 8225 transitions. [2021-05-03 15:38:56,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.5588235294117645) internal successors, (87), 34 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:38:56,604 INFO L276 IsEmpty]: Start isEmpty. Operand 3396 states and 8225 transitions. [2021-05-03 15:38:56,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-03 15:38:56,623 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:38:56,623 INFO L551 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:38:56,824 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-05-03 15:38:56,824 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:38:56,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:38:56,824 INFO L82 PathProgramCache]: Analyzing trace with hash -16912795, now seen corresponding path program 55 times [2021-05-03 15:38:56,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:38:56,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752457599] [2021-05-03 15:38:56,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:38:56,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:38:57,153 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:38:57,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752457599] [2021-05-03 15:38:57,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247050663] [2021-05-03 15:38:57,154 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 [2021-05-03 15:38:57,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:38:57,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-03 15:38:57,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:38:58,079 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:38:58,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:38:58,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21] total 36 [2021-05-03 15:38:58,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415726732] [2021-05-03 15:38:58,080 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-03 15:38:58,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:38:58,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-03 15:38:58,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1173, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 15:38:58,081 INFO L87 Difference]: Start difference. First operand 3396 states and 8225 transitions. Second operand has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 36 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:39:05,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:39:05,282 INFO L93 Difference]: Finished difference Result 7270 states and 16363 transitions. [2021-05-03 15:39:05,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-05-03 15:39:05,284 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 36 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have 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 [2021-05-03 15:39:05,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:39:05,300 INFO L225 Difference]: With dead ends: 7270 [2021-05-03 15:39:05,300 INFO L226 Difference]: Without dead ends: 7246 [2021-05-03 15:39:05,302 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5227 ImplicationChecksByTransitivity, 4512.8ms TimeCoverageRelationStatistics Valid=1708, Invalid=14548, Unknown=0, NotChecked=0, Total=16256 [2021-05-03 15:39:05,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7246 states. [2021-05-03 15:39:05,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7246 to 3694. [2021-05-03 15:39:05,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3694 states, 3693 states have (on average 2.428919577579204) internal successors, (8970), 3693 states have internal predecessors, (8970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:39:05,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3694 states to 3694 states and 8970 transitions. [2021-05-03 15:39:05,385 INFO L78 Accepts]: Start accepts. Automaton has 3694 states and 8970 transitions. Word has length 47 [2021-05-03 15:39:05,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:39:05,385 INFO L480 AbstractCegarLoop]: Abstraction has 3694 states and 8970 transitions. [2021-05-03 15:39:05,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 36 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:39:05,386 INFO L276 IsEmpty]: Start isEmpty. Operand 3694 states and 8970 transitions. [2021-05-03 15:39:05,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-03 15:39:05,391 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:39:05,391 INFO L551 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:39:05,592 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-05-03 15:39:05,592 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:39:05,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:39:05,593 INFO L82 PathProgramCache]: Analyzing trace with hash -747278705, now seen corresponding path program 56 times [2021-05-03 15:39:05,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:39:05,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963001694] [2021-05-03 15:39:05,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:39:05,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:39:05,871 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 15 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:39:05,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963001694] [2021-05-03 15:39:05,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973506582] [2021-05-03 15:39:05,871 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 [2021-05-03 15:39:05,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:39:05,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:39:05,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-03 15:39:05,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:39:06,964 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 15 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:39:06,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:39:06,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 22] total 35 [2021-05-03 15:39:06,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538465306] [2021-05-03 15:39:06,965 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-03 15:39:06,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:39:06,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-03 15:39:06,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1101, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 15:39:06,966 INFO L87 Difference]: Start difference. First operand 3694 states and 8970 transitions. Second operand has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 35 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) [2021-05-03 15:39:13,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:39:13,069 INFO L93 Difference]: Finished difference Result 5745 states and 13237 transitions. [2021-05-03 15:39:13,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-05-03 15:39:13,070 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 35 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 47 [2021-05-03 15:39:13,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:39:13,078 INFO L225 Difference]: With dead ends: 5745 [2021-05-03 15:39:13,078 INFO L226 Difference]: Without dead ends: 5741 [2021-05-03 15:39:13,079 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3493 ImplicationChecksByTransitivity, 4059.5ms TimeCoverageRelationStatistics Valid=1247, Invalid=10525, Unknown=0, NotChecked=0, Total=11772 [2021-05-03 15:39:13,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5741 states. [2021-05-03 15:39:13,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5741 to 3440. [2021-05-03 15:39:13,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3440 states, 3439 states have (on average 2.4286129688863043) internal successors, (8352), 3439 states have internal predecessors, (8352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:39:13,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3440 states to 3440 states and 8352 transitions. [2021-05-03 15:39:13,154 INFO L78 Accepts]: Start accepts. Automaton has 3440 states and 8352 transitions. Word has length 47 [2021-05-03 15:39:13,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:39:13,154 INFO L480 AbstractCegarLoop]: Abstraction has 3440 states and 8352 transitions. [2021-05-03 15:39:13,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 35 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) [2021-05-03 15:39:13,155 INFO L276 IsEmpty]: Start isEmpty. Operand 3440 states and 8352 transitions. [2021-05-03 15:39:13,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-03 15:39:13,159 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:39:13,159 INFO L551 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:39:13,359 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:39:13,359 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:39:13,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:39:13,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1296923881, now seen corresponding path program 57 times [2021-05-03 15:39:13,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:39:13,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431766366] [2021-05-03 15:39:13,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:39:13,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:39:13,676 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 2 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:39:13,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431766366] [2021-05-03 15:39:13,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058174092] [2021-05-03 15:39:13,677 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 [2021-05-03 15:39:13,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-05-03 15:39:13,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:39:13,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 15:39:13,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:39:14,558 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 2 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:39:14,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:39:14,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21] total 37 [2021-05-03 15:39:14,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537324965] [2021-05-03 15:39:14,558 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-03 15:39:14,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:39:14,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-03 15:39:14,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1235, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 15:39:14,559 INFO L87 Difference]: Start difference. First operand 3440 states and 8352 transitions. Second operand has 38 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 37 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:39:24,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:39:24,007 INFO L93 Difference]: Finished difference Result 8740 states and 19553 transitions. [2021-05-03 15:39:24,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-05-03 15:39:24,008 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 37 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have 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 [2021-05-03 15:39:24,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:39:24,023 INFO L225 Difference]: With dead ends: 8740 [2021-05-03 15:39:24,024 INFO L226 Difference]: Without dead ends: 8692 [2021-05-03 15:39:24,025 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7835 ImplicationChecksByTransitivity, 5794.7ms TimeCoverageRelationStatistics Valid=2779, Invalid=19871, Unknown=0, NotChecked=0, Total=22650 [2021-05-03 15:39:24,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8692 states. [2021-05-03 15:39:24,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8692 to 3420. [2021-05-03 15:39:24,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3420 states, 3419 states have (on average 2.428780345130155) internal successors, (8304), 3419 states have internal predecessors, (8304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:39:24,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3420 states to 3420 states and 8304 transitions. [2021-05-03 15:39:24,107 INFO L78 Accepts]: Start accepts. Automaton has 3420 states and 8304 transitions. Word has length 47 [2021-05-03 15:39:24,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:39:24,108 INFO L480 AbstractCegarLoop]: Abstraction has 3420 states and 8304 transitions. [2021-05-03 15:39:24,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 37 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:39:24,108 INFO L276 IsEmpty]: Start isEmpty. Operand 3420 states and 8304 transitions. [2021-05-03 15:39:24,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-03 15:39:24,112 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:39:24,113 INFO L551 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:39:24,314 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:39:24,314 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:39:24,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:39:24,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1447724947, now seen corresponding path program 58 times [2021-05-03 15:39:24,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:39:24,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107295930] [2021-05-03 15:39:24,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:39:24,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:39:24,649 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 6 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:39:24,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107295930] [2021-05-03 15:39:24,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356338959] [2021-05-03 15:39:24,649 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 [2021-05-03 15:39:24,674 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:39:24,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:39:24,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 15:39:24,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:39:25,550 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 6 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:39:25,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:39:25,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 38 [2021-05-03 15:39:25,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707441551] [2021-05-03 15:39:25,551 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-03 15:39:25,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:39:25,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-03 15:39:25,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 15:39:25,552 INFO L87 Difference]: Start difference. First operand 3420 states and 8304 transitions. Second operand has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 38 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:39:34,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:39:34,867 INFO L93 Difference]: Finished difference Result 10637 states and 23630 transitions. [2021-05-03 15:39:34,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-05-03 15:39:34,868 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 38 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have 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 [2021-05-03 15:39:34,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:39:34,885 INFO L225 Difference]: With dead ends: 10637 [2021-05-03 15:39:34,886 INFO L226 Difference]: Without dead ends: 10559 [2021-05-03 15:39:34,887 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8014 ImplicationChecksByTransitivity, 6120.5ms TimeCoverageRelationStatistics Valid=3216, Invalid=19434, Unknown=0, NotChecked=0, Total=22650 [2021-05-03 15:39:34,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10559 states. [2021-05-03 15:39:34,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10559 to 3388. [2021-05-03 15:39:34,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3388 states, 3387 states have (on average 2.4328314142308827) internal successors, (8240), 3387 states have internal predecessors, (8240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:39:34,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3388 states to 3388 states and 8240 transitions. [2021-05-03 15:39:34,983 INFO L78 Accepts]: Start accepts. Automaton has 3388 states and 8240 transitions. Word has length 47 [2021-05-03 15:39:34,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:39:34,983 INFO L480 AbstractCegarLoop]: Abstraction has 3388 states and 8240 transitions. [2021-05-03 15:39:34,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 38 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:39:34,983 INFO L276 IsEmpty]: Start isEmpty. Operand 3388 states and 8240 transitions. [2021-05-03 15:39:34,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-03 15:39:34,987 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:39:34,987 INFO L551 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:39:35,187 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-05-03 15:39:35,188 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:39:35,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:39:35,188 INFO L82 PathProgramCache]: Analyzing trace with hash 580886769, now seen corresponding path program 59 times [2021-05-03 15:39:35,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:39:35,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566777412] [2021-05-03 15:39:35,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:39:35,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:39:35,538 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:39:35,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566777412] [2021-05-03 15:39:35,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221895883] [2021-05-03 15:39:35,539 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 [2021-05-03 15:39:35,573 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-05-03 15:39:35,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:39:35,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 15:39:35,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:39:36,578 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:39:36,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:39:36,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 40 [2021-05-03 15:39:36,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702549104] [2021-05-03 15:39:36,579 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-05-03 15:39:36,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:39:36,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-05-03 15:39:36,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1426, Unknown=0, NotChecked=0, Total=1640 [2021-05-03 15:39:36,579 INFO L87 Difference]: Start difference. First operand 3388 states and 8240 transitions. Second operand has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 40 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:39:43,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:39:43,293 INFO L93 Difference]: Finished difference Result 12029 states and 26608 transitions. [2021-05-03 15:39:43,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-05-03 15:39:43,295 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 40 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have 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 [2021-05-03 15:39:43,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:39:43,315 INFO L225 Difference]: With dead ends: 12029 [2021-05-03 15:39:43,315 INFO L226 Difference]: Without dead ends: 11861 [2021-05-03 15:39:43,317 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6478 ImplicationChecksByTransitivity, 5140.8ms TimeCoverageRelationStatistics Valid=2941, Invalid=14881, Unknown=0, NotChecked=0, Total=17822 [2021-05-03 15:39:43,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11861 states. [2021-05-03 15:39:43,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11861 to 3416. [2021-05-03 15:39:43,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3416 states, 3415 states have (on average 2.4292825768667643) internal successors, (8296), 3415 states have internal predecessors, (8296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:39:43,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3416 states to 3416 states and 8296 transitions. [2021-05-03 15:39:43,425 INFO L78 Accepts]: Start accepts. Automaton has 3416 states and 8296 transitions. Word has length 47 [2021-05-03 15:39:43,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:39:43,425 INFO L480 AbstractCegarLoop]: Abstraction has 3416 states and 8296 transitions. [2021-05-03 15:39:43,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 40 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:39:43,426 INFO L276 IsEmpty]: Start isEmpty. Operand 3416 states and 8296 transitions. [2021-05-03 15:39:43,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-03 15:39:43,430 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:39:43,430 INFO L551 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:39:43,630 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:39:43,630 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:39:43,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:39:43,631 INFO L82 PathProgramCache]: Analyzing trace with hash 42317429, now seen corresponding path program 60 times [2021-05-03 15:39:43,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:39:43,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562177195] [2021-05-03 15:39:43,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:39:43,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:39:44,108 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 20 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:39:44,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562177195] [2021-05-03 15:39:44,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079266204] [2021-05-03 15:39:44,109 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 [2021-05-03 15:39:44,142 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-05-03 15:39:44,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:39:44,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 15:39:44,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:39:45,230 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 20 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:39:45,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:39:45,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 41 [2021-05-03 15:39:45,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017216003] [2021-05-03 15:39:45,231 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-05-03 15:39:45,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:39:45,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-05-03 15:39:45,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1485, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 15:39:45,232 INFO L87 Difference]: Start difference. First operand 3416 states and 8296 transitions. Second operand has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:39:52,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:39:52,669 INFO L93 Difference]: Finished difference Result 12153 states and 26725 transitions. [2021-05-03 15:39:52,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2021-05-03 15:39:52,671 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have 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 [2021-05-03 15:39:52,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:39:52,688 INFO L225 Difference]: With dead ends: 12153 [2021-05-03 15:39:52,689 INFO L226 Difference]: Without dead ends: 11850 [2021-05-03 15:39:52,690 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8350 ImplicationChecksByTransitivity, 6204.7ms TimeCoverageRelationStatistics Valid=4138, Invalid=18212, Unknown=0, NotChecked=0, Total=22350 [2021-05-03 15:39:52,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11850 states. [2021-05-03 15:39:52,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11850 to 3436. [2021-05-03 15:39:52,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3436 states, 3435 states have (on average 2.426783114992722) internal successors, (8336), 3435 states have internal predecessors, (8336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:39:52,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3436 states to 3436 states and 8336 transitions. [2021-05-03 15:39:52,789 INFO L78 Accepts]: Start accepts. Automaton has 3436 states and 8336 transitions. Word has length 47 [2021-05-03 15:39:52,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:39:52,789 INFO L480 AbstractCegarLoop]: Abstraction has 3436 states and 8336 transitions. [2021-05-03 15:39:52,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:39:52,789 INFO L276 IsEmpty]: Start isEmpty. Operand 3436 states and 8336 transitions. [2021-05-03 15:39:52,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-03 15:39:52,793 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:39:52,793 INFO L551 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:39:52,993 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:39:52,993 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:39:52,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:39:52,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1274116345, now seen corresponding path program 61 times [2021-05-03 15:39:52,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:39:52,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080836817] [2021-05-03 15:39:52,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:39:52,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:39:53,416 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 30 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:39:53,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080836817] [2021-05-03 15:39:53,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138378139] [2021-05-03 15:39:53,417 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 [2021-05-03 15:39:53,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:39:53,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-03 15:39:53,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:39:54,500 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 30 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:39:54,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:39:54,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 41 [2021-05-03 15:39:54,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303019407] [2021-05-03 15:39:54,501 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-05-03 15:39:54,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:39:54,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-05-03 15:39:54,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=1473, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 15:39:54,502 INFO L87 Difference]: Start difference. First operand 3436 states and 8336 transitions. Second operand has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:40:01,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:40:01,392 INFO L93 Difference]: Finished difference Result 12452 states and 28026 transitions. [2021-05-03 15:40:01,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-05-03 15:40:01,394 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have 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 [2021-05-03 15:40:01,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:40:01,418 INFO L225 Difference]: With dead ends: 12452 [2021-05-03 15:40:01,418 INFO L226 Difference]: Without dead ends: 11933 [2021-05-03 15:40:01,419 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6615 ImplicationChecksByTransitivity, 6014.3ms TimeCoverageRelationStatistics Valid=3920, Invalid=15820, Unknown=0, NotChecked=0, Total=19740 [2021-05-03 15:40:01,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11933 states. [2021-05-03 15:40:01,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11933 to 2957. [2021-05-03 15:40:01,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2957 states, 2956 states have (on average 2.3687415426251692) internal successors, (7002), 2956 states have internal predecessors, (7002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:40:01,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2957 states to 2957 states and 7002 transitions. [2021-05-03 15:40:01,521 INFO L78 Accepts]: Start accepts. Automaton has 2957 states and 7002 transitions. Word has length 47 [2021-05-03 15:40:01,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:40:01,522 INFO L480 AbstractCegarLoop]: Abstraction has 2957 states and 7002 transitions. [2021-05-03 15:40:01,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:40:01,522 INFO L276 IsEmpty]: Start isEmpty. Operand 2957 states and 7002 transitions. [2021-05-03 15:40:01,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-03 15:40:01,525 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:40:01,525 INFO L551 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:40:01,726 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:40:01,727 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:40:01,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:40:01,727 INFO L82 PathProgramCache]: Analyzing trace with hash 437294911, now seen corresponding path program 62 times [2021-05-03 15:40:01,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:40:01,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179118751] [2021-05-03 15:40:01,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:40:01,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:40:01,973 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 51 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:40:01,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179118751] [2021-05-03 15:40:01,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867817289] [2021-05-03 15:40:01,974 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 [2021-05-03 15:40:01,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:40:01,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:40:02,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-03 15:40:02,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:40:03,258 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 51 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:40:03,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:40:03,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 22] total 34 [2021-05-03 15:40:03,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726593507] [2021-05-03 15:40:03,259 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-03 15:40:03,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:40:03,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-03 15:40:03,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=978, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 15:40:03,259 INFO L87 Difference]: Start difference. First operand 2957 states and 7002 transitions. Second operand has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 34 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) [2021-05-03 15:40:16,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:40:16,029 INFO L93 Difference]: Finished difference Result 6600 states and 14572 transitions. [2021-05-03 15:40:16,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2021-05-03 15:40:16,031 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 34 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 47 [2021-05-03 15:40:16,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:40:16,043 INFO L225 Difference]: With dead ends: 6600 [2021-05-03 15:40:16,043 INFO L226 Difference]: Without dead ends: 6596 [2021-05-03 15:40:16,045 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14541 ImplicationChecksByTransitivity, 11292.2ms TimeCoverageRelationStatistics Valid=7575, Invalid=27581, Unknown=0, NotChecked=0, Total=35156 [2021-05-03 15:40:16,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6596 states. [2021-05-03 15:40:16,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6596 to 3022. [2021-05-03 15:40:16,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3022 states, 3021 states have (on average 2.386957960940086) internal successors, (7211), 3021 states have internal predecessors, (7211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:40:16,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3022 states to 3022 states and 7211 transitions. [2021-05-03 15:40:16,112 INFO L78 Accepts]: Start accepts. Automaton has 3022 states and 7211 transitions. Word has length 47 [2021-05-03 15:40:16,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:40:16,112 INFO L480 AbstractCegarLoop]: Abstraction has 3022 states and 7211 transitions. [2021-05-03 15:40:16,112 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 34 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) [2021-05-03 15:40:16,112 INFO L276 IsEmpty]: Start isEmpty. Operand 3022 states and 7211 transitions. [2021-05-03 15:40:16,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-03 15:40:16,115 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:40:16,116 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:40:16,316 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:40:16,316 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:40:16,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:40:16,317 INFO L82 PathProgramCache]: Analyzing trace with hash 813264653, now seen corresponding path program 63 times [2021-05-03 15:40:16,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:40:16,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037756752] [2021-05-03 15:40:16,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:40:16,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:40:16,962 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:40:16,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037756752] [2021-05-03 15:40:16,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302333074] [2021-05-03 15:40:16,962 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 [2021-05-03 15:40:17,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-05-03 15:40:17,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:40:17,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 15:40:17,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:40:18,744 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:40:18,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:40:18,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 43 [2021-05-03 15:40:18,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661466784] [2021-05-03 15:40:18,746 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-05-03 15:40:18,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:40:18,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-05-03 15:40:18,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=1541, Unknown=0, NotChecked=0, Total=1892 [2021-05-03 15:40:18,746 INFO L87 Difference]: Start difference. First operand 3022 states and 7211 transitions. Second operand has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 43 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:40:29,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:40:29,659 INFO L93 Difference]: Finished difference Result 4634 states and 10318 transitions. [2021-05-03 15:40:29,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-05-03 15:40:29,661 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 43 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have 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 [2021-05-03 15:40:29,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:40:29,669 INFO L225 Difference]: With dead ends: 4634 [2021-05-03 15:40:29,669 INFO L226 Difference]: Without dead ends: 4382 [2021-05-03 15:40:29,670 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9327 ImplicationChecksByTransitivity, 10155.6ms TimeCoverageRelationStatistics Valid=6810, Invalid=19272, Unknown=0, NotChecked=0, Total=26082 [2021-05-03 15:40:29,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4382 states. [2021-05-03 15:40:29,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4382 to 3023. [2021-05-03 15:40:29,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3023 states, 3022 states have (on average 2.382528127068167) internal successors, (7200), 3022 states have internal predecessors, (7200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:40:29,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3023 states to 3023 states and 7200 transitions. [2021-05-03 15:40:29,728 INFO L78 Accepts]: Start accepts. Automaton has 3023 states and 7200 transitions. Word has length 49 [2021-05-03 15:40:29,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:40:29,728 INFO L480 AbstractCegarLoop]: Abstraction has 3023 states and 7200 transitions. [2021-05-03 15:40:29,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 43 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:40:29,728 INFO L276 IsEmpty]: Start isEmpty. Operand 3023 states and 7200 transitions. [2021-05-03 15:40:29,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-03 15:40:29,733 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:40:29,733 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:40:29,934 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:40:29,934 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:40:29,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:40:29,935 INFO L82 PathProgramCache]: Analyzing trace with hash 769472859, now seen corresponding path program 64 times [2021-05-03 15:40:29,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:40:29,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284227268] [2021-05-03 15:40:29,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:40:29,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:40:30,280 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:40:30,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284227268] [2021-05-03 15:40:30,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035745792] [2021-05-03 15:40:30,281 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 [2021-05-03 15:40:30,318 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:40:30,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:40:30,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-03 15:40:30,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:40:32,062 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:40:32,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:40:32,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 22] total 33 [2021-05-03 15:40:32,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209877937] [2021-05-03 15:40:32,063 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-03 15:40:32,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:40:32,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-03 15:40:32,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=881, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 15:40:32,064 INFO L87 Difference]: Start difference. First operand 3023 states and 7200 transitions. Second operand has 34 states, 34 states have (on average 2.6176470588235294) internal successors, (89), 33 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:40:39,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:40:39,310 INFO L93 Difference]: Finished difference Result 4059 states and 9228 transitions. [2021-05-03 15:40:39,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-05-03 15:40:39,312 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.6176470588235294) internal successors, (89), 33 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have 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 [2021-05-03 15:40:39,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:40:39,318 INFO L225 Difference]: With dead ends: 4059 [2021-05-03 15:40:39,319 INFO L226 Difference]: Without dead ends: 4055 [2021-05-03 15:40:39,320 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8705 ImplicationChecksByTransitivity, 7329.7ms TimeCoverageRelationStatistics Valid=5366, Invalid=17586, Unknown=0, NotChecked=0, Total=22952 [2021-05-03 15:40:39,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4055 states. [2021-05-03 15:40:39,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4055 to 3023. [2021-05-03 15:40:39,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3023 states, 3022 states have (on average 2.3821972203838517) internal successors, (7199), 3022 states have internal predecessors, (7199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:40:39,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3023 states to 3023 states and 7199 transitions. [2021-05-03 15:40:39,367 INFO L78 Accepts]: Start accepts. Automaton has 3023 states and 7199 transitions. Word has length 49 [2021-05-03 15:40:39,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:40:39,367 INFO L480 AbstractCegarLoop]: Abstraction has 3023 states and 7199 transitions. [2021-05-03 15:40:39,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.6176470588235294) internal successors, (89), 33 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:40:39,368 INFO L276 IsEmpty]: Start isEmpty. Operand 3023 states and 7199 transitions. [2021-05-03 15:40:39,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-03 15:40:39,371 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:40:39,372 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:40:39,597 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-05-03 15:40:39,597 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:40:39,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:40:39,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1059402165, now seen corresponding path program 65 times [2021-05-03 15:40:39,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:40:39,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447726081] [2021-05-03 15:40:39,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:40:39,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:40:39,871 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 1 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:40:39,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447726081] [2021-05-03 15:40:39,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515468763] [2021-05-03 15:40:39,871 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 [2021-05-03 15:40:39,902 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-05-03 15:40:39,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:40:39,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-03 15:40:39,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:40:40,068 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:40:40,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:40:40,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-05-03 15:40:40,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139028796] [2021-05-03 15:40:40,069 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 15:40:40,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:40:40,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 15:40:40,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-05-03 15:40:40,069 INFO L87 Difference]: Start difference. First operand 3023 states and 7199 transitions. Second operand has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:40:40,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:40:40,381 INFO L93 Difference]: Finished difference Result 4018 states and 9410 transitions. [2021-05-03 15:40:40,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 15:40:40,382 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-05-03 15:40:40,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:40:40,387 INFO L225 Difference]: With dead ends: 4018 [2021-05-03 15:40:40,388 INFO L226 Difference]: Without dead ends: 3949 [2021-05-03 15:40:40,388 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 226.9ms TimeCoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-05-03 15:40:40,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3949 states. [2021-05-03 15:40:40,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3949 to 3564. [2021-05-03 15:40:40,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3564 states, 3563 states have (on average 2.4139769856862197) internal successors, (8601), 3563 states have internal predecessors, (8601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:40:40,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3564 states to 3564 states and 8601 transitions. [2021-05-03 15:40:40,438 INFO L78 Accepts]: Start accepts. Automaton has 3564 states and 8601 transitions. Word has length 51 [2021-05-03 15:40:40,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:40:40,438 INFO L480 AbstractCegarLoop]: Abstraction has 3564 states and 8601 transitions. [2021-05-03 15:40:40,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:40:40,438 INFO L276 IsEmpty]: Start isEmpty. Operand 3564 states and 8601 transitions. [2021-05-03 15:40:40,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-03 15:40:40,442 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:40:40,442 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:40:40,642 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2021-05-03 15:40:40,643 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:40:40,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:40:40,643 INFO L82 PathProgramCache]: Analyzing trace with hash 163570205, now seen corresponding path program 66 times [2021-05-03 15:40:40,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:40:40,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477560167] [2021-05-03 15:40:40,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:40:40,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:40:41,317 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:40:41,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477560167] [2021-05-03 15:40:41,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687985158] [2021-05-03 15:40:41,318 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 [2021-05-03 15:40:41,347 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-05-03 15:40:41,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:40:41,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-03 15:40:41,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:40:41,987 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 2 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:40:41,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:40:41,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 15] total 37 [2021-05-03 15:40:41,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892557446] [2021-05-03 15:40:41,987 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-03 15:40:41,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:40:41,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-03 15:40:41,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1197, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 15:40:41,988 INFO L87 Difference]: Start difference. First operand 3564 states and 8601 transitions. Second operand has 37 states, 37 states have (on average 2.5675675675675675) internal successors, (95), 37 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) [2021-05-03 15:40:44,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:40:44,622 INFO L93 Difference]: Finished difference Result 4574 states and 10570 transitions. [2021-05-03 15:40:44,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 15:40:44,624 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.5675675675675675) internal successors, (95), 37 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 51 [2021-05-03 15:40:44,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:40:44,630 INFO L225 Difference]: With dead ends: 4574 [2021-05-03 15:40:44,630 INFO L226 Difference]: Without dead ends: 4571 [2021-05-03 15:40:44,630 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 2154.2ms TimeCoverageRelationStatistics Valid=447, Invalid=3843, Unknown=0, NotChecked=0, Total=4290 [2021-05-03 15:40:44,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4571 states. [2021-05-03 15:40:44,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4571 to 3534. [2021-05-03 15:40:44,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3534 states, 3533 states have (on average 2.4152278516841212) internal successors, (8533), 3533 states have internal predecessors, (8533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:40:44,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3534 states to 3534 states and 8533 transitions. [2021-05-03 15:40:44,674 INFO L78 Accepts]: Start accepts. Automaton has 3534 states and 8533 transitions. Word has length 51 [2021-05-03 15:40:44,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:40:44,675 INFO L480 AbstractCegarLoop]: Abstraction has 3534 states and 8533 transitions. [2021-05-03 15:40:44,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.5675675675675675) internal successors, (95), 37 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) [2021-05-03 15:40:44,675 INFO L276 IsEmpty]: Start isEmpty. Operand 3534 states and 8533 transitions. [2021-05-03 15:40:44,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-03 15:40:44,678 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:40:44,678 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:40:44,878 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2021-05-03 15:40:44,879 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:40:44,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:40:44,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1009669025, now seen corresponding path program 67 times [2021-05-03 15:40:44,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:40:44,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551146756] [2021-05-03 15:40:44,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:40:44,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:40:45,213 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:40:45,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551146756] [2021-05-03 15:40:45,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182825249] [2021-05-03 15:40:45,214 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:40:45,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:40:45,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 52 conjunts are in the unsatisfiable core [2021-05-03 15:40:45,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:40:46,380 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:40:46,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:40:46,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 23] total 39 [2021-05-03 15:40:46,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398594238] [2021-05-03 15:40:46,381 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-03 15:40:46,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:40:46,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-03 15:40:46,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1386, Unknown=0, NotChecked=0, Total=1560 [2021-05-03 15:40:46,381 INFO L87 Difference]: Start difference. First operand 3534 states and 8533 transitions. Second operand has 40 states, 40 states have (on average 2.425) internal successors, (97), 39 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:40:56,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:40:56,625 INFO L93 Difference]: Finished difference Result 7445 states and 16594 transitions. [2021-05-03 15:40:56,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-05-03 15:40:56,627 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.425) internal successors, (97), 39 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have 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 [2021-05-03 15:40:56,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:40:56,636 INFO L225 Difference]: With dead ends: 7445 [2021-05-03 15:40:56,636 INFO L226 Difference]: Without dead ends: 7421 [2021-05-03 15:40:56,637 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6726 ImplicationChecksByTransitivity, 5961.5ms TimeCoverageRelationStatistics Valid=1955, Invalid=18637, Unknown=0, NotChecked=0, Total=20592 [2021-05-03 15:40:56,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7421 states. [2021-05-03 15:40:56,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7421 to 3801. [2021-05-03 15:40:56,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3801 states, 3800 states have (on average 2.4194736842105264) internal successors, (9194), 3800 states have internal predecessors, (9194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:40:56,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3801 states to 3801 states and 9194 transitions. [2021-05-03 15:40:56,691 INFO L78 Accepts]: Start accepts. Automaton has 3801 states and 9194 transitions. Word has length 51 [2021-05-03 15:40:56,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:40:56,691 INFO L480 AbstractCegarLoop]: Abstraction has 3801 states and 9194 transitions. [2021-05-03 15:40:56,691 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.425) internal successors, (97), 39 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:40:56,691 INFO L276 IsEmpty]: Start isEmpty. Operand 3801 states and 9194 transitions. [2021-05-03 15:40:56,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-03 15:40:56,695 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:40:56,695 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:40:56,912 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:40:56,912 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:40:56,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:40:56,912 INFO L82 PathProgramCache]: Analyzing trace with hash 279303115, now seen corresponding path program 68 times [2021-05-03 15:40:56,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:40:56,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959971046] [2021-05-03 15:40:56,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:40:56,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:40:57,264 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 17 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:40:57,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959971046] [2021-05-03 15:40:57,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914523199] [2021-05-03 15:40:57,264 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 [2021-05-03 15:40:57,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:40:57,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:40:57,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 52 conjunts are in the unsatisfiable core [2021-05-03 15:40:57,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:40:58,538 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 17 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:40:58,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:40:58,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 24] total 38 [2021-05-03 15:40:58,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803606134] [2021-05-03 15:40:58,539 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-03 15:40:58,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:40:58,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-03 15:40:58,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1308, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 15:40:58,539 INFO L87 Difference]: Start difference. First operand 3801 states and 9194 transitions. Second operand has 39 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 38 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:41:06,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:41:06,744 INFO L93 Difference]: Finished difference Result 5719 states and 13052 transitions. [2021-05-03 15:41:06,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-05-03 15:41:06,746 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 38 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have 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 [2021-05-03 15:41:06,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:41:06,754 INFO L225 Difference]: With dead ends: 5719 [2021-05-03 15:41:06,754 INFO L226 Difference]: Without dead ends: 5715 [2021-05-03 15:41:06,755 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4357 ImplicationChecksByTransitivity, 5184.3ms TimeCoverageRelationStatistics Valid=1409, Invalid=13111, Unknown=0, NotChecked=0, Total=14520 [2021-05-03 15:41:06,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5715 states. [2021-05-03 15:41:06,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5715 to 3599. [2021-05-03 15:41:06,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3599 states, 3598 states have (on average 2.4171762090050026) internal successors, (8697), 3598 states have internal predecessors, (8697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:41:06,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3599 states to 3599 states and 8697 transitions. [2021-05-03 15:41:06,824 INFO L78 Accepts]: Start accepts. Automaton has 3599 states and 8697 transitions. Word has length 51 [2021-05-03 15:41:06,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:41:06,824 INFO L480 AbstractCegarLoop]: Abstraction has 3599 states and 8697 transitions. [2021-05-03 15:41:06,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 38 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:41:06,825 INFO L276 IsEmpty]: Start isEmpty. Operand 3599 states and 8697 transitions. [2021-05-03 15:41:06,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-03 15:41:06,829 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:41:06,829 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:41:07,030 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable219 [2021-05-03 15:41:07,030 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:41:07,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:41:07,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1388875227, now seen corresponding path program 69 times [2021-05-03 15:41:07,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:41:07,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396614650] [2021-05-03 15:41:07,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:41:07,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:41:07,447 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 2 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:41:07,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396614650] [2021-05-03 15:41:07,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810050575] [2021-05-03 15:41:07,448 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 [2021-05-03 15:41:07,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-05-03 15:41:07,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:41:07,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-03 15:41:07,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:41:08,765 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 2 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:41:08,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:41:08,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 23] total 40 [2021-05-03 15:41:08,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211999241] [2021-05-03 15:41:08,765 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-05-03 15:41:08,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:41:08,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-05-03 15:41:08,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1453, Unknown=0, NotChecked=0, Total=1640 [2021-05-03 15:41:08,766 INFO L87 Difference]: Start difference. First operand 3599 states and 8697 transitions. Second operand has 41 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 40 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:41:22,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:41:22,637 INFO L93 Difference]: Finished difference Result 9190 states and 20382 transitions. [2021-05-03 15:41:22,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2021-05-03 15:41:22,639 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 40 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have 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 [2021-05-03 15:41:22,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:41:22,651 INFO L225 Difference]: With dead ends: 9190 [2021-05-03 15:41:22,651 INFO L226 Difference]: Without dead ends: 9142 [2021-05-03 15:41:22,652 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10597 ImplicationChecksByTransitivity, 8013.4ms TimeCoverageRelationStatistics Valid=3311, Invalid=26791, Unknown=0, NotChecked=0, Total=30102 [2021-05-03 15:41:22,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9142 states. [2021-05-03 15:41:22,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9142 to 3554. [2021-05-03 15:41:22,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3554 states, 3553 states have (on average 2.414579228820715) internal successors, (8579), 3553 states have internal predecessors, (8579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:41:22,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3554 states to 3554 states and 8579 transitions. [2021-05-03 15:41:22,717 INFO L78 Accepts]: Start accepts. Automaton has 3554 states and 8579 transitions. Word has length 51 [2021-05-03 15:41:22,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:41:22,718 INFO L480 AbstractCegarLoop]: Abstraction has 3554 states and 8579 transitions. [2021-05-03 15:41:22,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 40 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:41:22,718 INFO L276 IsEmpty]: Start isEmpty. Operand 3554 states and 8579 transitions. [2021-05-03 15:41:22,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-03 15:41:22,721 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:41:22,721 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:41:22,937 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-05-03 15:41:22,937 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:41:22,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:41:22,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1681194409, now seen corresponding path program 70 times [2021-05-03 15:41:22,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:41:22,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227065457] [2021-05-03 15:41:22,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:41:22,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:41:23,322 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 6 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:41:23,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227065457] [2021-05-03 15:41:23,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067526542] [2021-05-03 15:41:23,323 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 [2021-05-03 15:41:23,347 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:41:23,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:41:23,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-03 15:41:23,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:41:24,551 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 6 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:41:24,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:41:24,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23] total 41 [2021-05-03 15:41:24,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19248297] [2021-05-03 15:41:24,552 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-05-03 15:41:24,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:41:24,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-05-03 15:41:24,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1520, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 15:41:24,553 INFO L87 Difference]: Start difference. First operand 3554 states and 8579 transitions. Second operand has 42 states, 42 states have (on average 2.3095238095238093) internal successors, (97), 41 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:41:38,981 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2021-05-03 15:41:39,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:41:39,552 INFO L93 Difference]: Finished difference Result 10995 states and 24217 transitions. [2021-05-03 15:41:39,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2021-05-03 15:41:39,554 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.3095238095238093) internal successors, (97), 41 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have 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 [2021-05-03 15:41:39,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:41:39,570 INFO L225 Difference]: With dead ends: 10995 [2021-05-03 15:41:39,570 INFO L226 Difference]: Without dead ends: 10917 [2021-05-03 15:41:39,572 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11924 ImplicationChecksByTransitivity, 9974.8ms TimeCoverageRelationStatistics Valid=4150, Invalid=28792, Unknown=0, NotChecked=0, Total=32942 [2021-05-03 15:41:39,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10917 states. [2021-05-03 15:41:39,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10917 to 3498. [2021-05-03 15:41:39,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3498 states, 3497 states have (on average 2.4177866742922505) internal successors, (8455), 3497 states have internal predecessors, (8455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:41:39,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3498 states to 3498 states and 8455 transitions. [2021-05-03 15:41:39,653 INFO L78 Accepts]: Start accepts. Automaton has 3498 states and 8455 transitions. Word has length 51 [2021-05-03 15:41:39,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:41:39,653 INFO L480 AbstractCegarLoop]: Abstraction has 3498 states and 8455 transitions. [2021-05-03 15:41:39,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.3095238095238093) internal successors, (97), 41 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:41:39,654 INFO L276 IsEmpty]: Start isEmpty. Operand 3498 states and 8455 transitions. [2021-05-03 15:41:39,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-03 15:41:39,657 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:41:39,657 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:41:39,857 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-05-03 15:41:39,858 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:41:39,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:41:39,858 INFO L82 PathProgramCache]: Analyzing trace with hash -393169363, now seen corresponding path program 71 times [2021-05-03 15:41:39,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:41:39,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435634681] [2021-05-03 15:41:39,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:41:39,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:41:40,395 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 12 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:41:40,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435634681] [2021-05-03 15:41:40,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618227888] [2021-05-03 15:41:40,396 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 [2021-05-03 15:41:40,428 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-05-03 15:41:40,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:41:40,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-03 15:41:40,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:41:41,927 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 12 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:41:41,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:41:41,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24] total 43 [2021-05-03 15:41:41,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735840518] [2021-05-03 15:41:41,928 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-05-03 15:41:41,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:41:41,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-05-03 15:41:41,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1660, Unknown=0, NotChecked=0, Total=1892 [2021-05-03 15:41:41,928 INFO L87 Difference]: Start difference. First operand 3498 states and 8455 transitions. Second operand has 44 states, 44 states have (on average 2.2045454545454546) internal successors, (97), 43 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:41:54,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:41:54,499 INFO L93 Difference]: Finished difference Result 12850 states and 28081 transitions. [2021-05-03 15:41:54,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-05-03 15:41:54,502 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.2045454545454546) internal successors, (97), 43 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have 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 [2021-05-03 15:41:54,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:41:54,521 INFO L225 Difference]: With dead ends: 12850 [2021-05-03 15:41:54,521 INFO L226 Difference]: Without dead ends: 12643 [2021-05-03 15:41:54,523 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9889 ImplicationChecksByTransitivity, 8802.9ms TimeCoverageRelationStatistics Valid=4035, Invalid=22697, Unknown=0, NotChecked=0, Total=26732 [2021-05-03 15:41:54,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12643 states. [2021-05-03 15:41:54,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12643 to 3486. [2021-05-03 15:41:54,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3486 states, 3485 states have (on average 2.4192252510760404) internal successors, (8431), 3485 states have internal predecessors, (8431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:41:54,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3486 states to 3486 states and 8431 transitions. [2021-05-03 15:41:54,617 INFO L78 Accepts]: Start accepts. Automaton has 3486 states and 8431 transitions. Word has length 51 [2021-05-03 15:41:54,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:41:54,617 INFO L480 AbstractCegarLoop]: Abstraction has 3486 states and 8431 transitions. [2021-05-03 15:41:54,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 2.2045454545454546) internal successors, (97), 43 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:41:54,617 INFO L276 IsEmpty]: Start isEmpty. Operand 3486 states and 8431 transitions. [2021-05-03 15:41:54,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-03 15:41:54,620 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:41:54,620 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:41:54,820 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-05-03 15:41:54,820 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:41:54,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:41:54,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1111204943, now seen corresponding path program 72 times [2021-05-03 15:41:54,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:41:54,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536798334] [2021-05-03 15:41:54,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:41:54,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:41:55,366 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 20 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:41:55,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536798334] [2021-05-03 15:41:55,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203111148] [2021-05-03 15:41:55,367 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:41:55,397 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-05-03 15:41:55,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:41:55,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-03 15:41:55,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:41:56,979 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 20 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:41:56,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:41:56,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24] total 44 [2021-05-03 15:41:56,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490084391] [2021-05-03 15:41:56,980 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-05-03 15:41:56,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:41:56,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-05-03 15:41:56,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1726, Unknown=0, NotChecked=0, Total=1980 [2021-05-03 15:41:56,980 INFO L87 Difference]: Start difference. First operand 3486 states and 8431 transitions. Second operand has 45 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 44 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:42:08,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:42:08,952 INFO L93 Difference]: Finished difference Result 14077 states and 30678 transitions. [2021-05-03 15:42:08,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-05-03 15:42:08,954 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 44 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have 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 [2021-05-03 15:42:08,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:42:08,974 INFO L225 Difference]: With dead ends: 14077 [2021-05-03 15:42:08,974 INFO L226 Difference]: Without dead ends: 13789 [2021-05-03 15:42:08,977 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9832 ImplicationChecksByTransitivity, 9117.5ms TimeCoverageRelationStatistics Valid=4381, Invalid=21701, Unknown=0, NotChecked=0, Total=26082 [2021-05-03 15:42:08,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13789 states. [2021-05-03 15:42:09,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13789 to 3506. [2021-05-03 15:42:09,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3506 states, 3505 states have (on average 2.416833095577746) internal successors, (8471), 3505 states have internal predecessors, (8471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:42:09,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3506 states to 3506 states and 8471 transitions. [2021-05-03 15:42:09,076 INFO L78 Accepts]: Start accepts. Automaton has 3506 states and 8471 transitions. Word has length 51 [2021-05-03 15:42:09,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:42:09,076 INFO L480 AbstractCegarLoop]: Abstraction has 3506 states and 8471 transitions. [2021-05-03 15:42:09,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 44 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:42:09,076 INFO L276 IsEmpty]: Start isEmpty. Operand 3506 states and 8471 transitions. [2021-05-03 15:42:09,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-03 15:42:09,078 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:42:09,079 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:42:09,292 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-05-03 15:42:09,293 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:42:09,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:42:09,293 INFO L82 PathProgramCache]: Analyzing trace with hash -547770827, now seen corresponding path program 73 times [2021-05-03 15:42:09,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:42:09,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465809545] [2021-05-03 15:42:09,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:42:09,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:42:09,964 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 30 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:42:09,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465809545] [2021-05-03 15:42:09,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345199592] [2021-05-03 15:42:09,964 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:42:10,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:42:10,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 48 conjunts are in the unsatisfiable core [2021-05-03 15:42:10,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:42:11,921 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 30 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:42:11,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:42:11,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 45 [2021-05-03 15:42:11,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988808498] [2021-05-03 15:42:11,921 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-05-03 15:42:11,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:42:11,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-05-03 15:42:11,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=1788, Unknown=0, NotChecked=0, Total=2070 [2021-05-03 15:42:11,922 INFO L87 Difference]: Start difference. First operand 3506 states and 8471 transitions. Second operand has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:42:25,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:42:25,488 INFO L93 Difference]: Finished difference Result 14360 states and 31107 transitions. [2021-05-03 15:42:25,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2021-05-03 15:42:25,491 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have 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 [2021-05-03 15:42:25,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:42:25,511 INFO L225 Difference]: With dead ends: 14360 [2021-05-03 15:42:25,512 INFO L226 Difference]: Without dead ends: 13892 [2021-05-03 15:42:25,513 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11895 ImplicationChecksByTransitivity, 11524.7ms TimeCoverageRelationStatistics Valid=5935, Invalid=25571, Unknown=0, NotChecked=0, Total=31506 [2021-05-03 15:42:25,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13892 states. [2021-05-03 15:42:25,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13892 to 3518. [2021-05-03 15:42:25,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3518 states, 3517 states have (on average 2.415410861529713) internal successors, (8495), 3517 states have internal predecessors, (8495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:42:25,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3518 states to 3518 states and 8495 transitions. [2021-05-03 15:42:25,610 INFO L78 Accepts]: Start accepts. Automaton has 3518 states and 8495 transitions. Word has length 51 [2021-05-03 15:42:25,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:42:25,610 INFO L480 AbstractCegarLoop]: Abstraction has 3518 states and 8495 transitions. [2021-05-03 15:42:25,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:42:25,610 INFO L276 IsEmpty]: Start isEmpty. Operand 3518 states and 8495 transitions. [2021-05-03 15:42:25,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-03 15:42:25,613 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:42:25,613 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:42:25,816 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:42:25,817 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:42:25,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:42:25,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1021996473, now seen corresponding path program 74 times [2021-05-03 15:42:25,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:42:25,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379460235] [2021-05-03 15:42:25,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:42:25,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:42:26,551 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 42 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:42:26,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379460235] [2021-05-03 15:42:26,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447188231] [2021-05-03 15:42:26,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:42:26,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:42:26,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:42:26,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-03 15:42:26,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:42:28,578 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 42 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:42:28,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:42:28,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 45 [2021-05-03 15:42:28,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131286373] [2021-05-03 15:42:28,579 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-05-03 15:42:28,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:42:28,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-05-03 15:42:28,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=1773, Unknown=0, NotChecked=0, Total=2070 [2021-05-03 15:42:28,579 INFO L87 Difference]: Start difference. First operand 3518 states and 8495 transitions. Second operand has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:42:41,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:42:41,302 INFO L93 Difference]: Finished difference Result 11991 states and 26143 transitions. [2021-05-03 15:42:41,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-05-03 15:42:41,305 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have 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 [2021-05-03 15:42:41,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:42:41,319 INFO L225 Difference]: With dead ends: 11991 [2021-05-03 15:42:41,320 INFO L226 Difference]: Without dead ends: 11337 [2021-05-03 15:42:41,321 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9503 ImplicationChecksByTransitivity, 11192.2ms TimeCoverageRelationStatistics Valid=5557, Invalid=21833, Unknown=0, NotChecked=0, Total=27390 [2021-05-03 15:42:41,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11337 states. [2021-05-03 15:42:41,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11337 to 3645. [2021-05-03 15:42:41,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3645 states, 3644 states have (on average 2.372941822173436) internal successors, (8647), 3644 states have internal predecessors, (8647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:42:41,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3645 states to 3645 states and 8647 transitions. [2021-05-03 15:42:41,399 INFO L78 Accepts]: Start accepts. Automaton has 3645 states and 8647 transitions. Word has length 51 [2021-05-03 15:42:41,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:42:41,399 INFO L480 AbstractCegarLoop]: Abstraction has 3645 states and 8647 transitions. [2021-05-03 15:42:41,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:42:41,399 INFO L276 IsEmpty]: Start isEmpty. Operand 3645 states and 8647 transitions. [2021-05-03 15:42:41,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-03 15:42:41,403 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:42:41,403 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:42:41,616 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:42:41,617 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:42:41,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:42:41,617 INFO L82 PathProgramCache]: Analyzing trace with hash -2045072061, now seen corresponding path program 75 times [2021-05-03 15:42:41,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:42:41,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422930417] [2021-05-03 15:42:41,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:42:41,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:42:42,058 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 66 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:42:42,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422930417] [2021-05-03 15:42:42,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73690777] [2021-05-03 15:42:42,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:42:42,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-05-03 15:42:42,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:42:42,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 15:42:42,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:42:44,202 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 66 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:42:44,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:42:44,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 24] total 37 [2021-05-03 15:42:44,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118309458] [2021-05-03 15:42:44,202 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-03 15:42:44,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:42:44,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-03 15:42:44,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=1159, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 15:42:44,203 INFO L87 Difference]: Start difference. First operand 3645 states and 8647 transitions. Second operand has 38 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 37 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:43:02,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:43:02,961 INFO L93 Difference]: Finished difference Result 8265 states and 18251 transitions. [2021-05-03 15:43:02,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 195 states. [2021-05-03 15:43:02,964 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 37 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have 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 [2021-05-03 15:43:02,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:43:02,974 INFO L225 Difference]: With dead ends: 8265 [2021-05-03 15:43:02,975 INFO L226 Difference]: Without dead ends: 8261 [2021-05-03 15:43:02,977 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22325 ImplicationChecksByTransitivity, 17763.3ms TimeCoverageRelationStatistics Valid=11066, Invalid=40690, Unknown=0, NotChecked=0, Total=51756 [2021-05-03 15:43:02,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8261 states. [2021-05-03 15:43:03,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8261 to 3715. [2021-05-03 15:43:03,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3715 states, 3714 states have (on average 2.389876144318794) internal successors, (8876), 3714 states have internal predecessors, (8876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:43:03,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3715 states to 3715 states and 8876 transitions. [2021-05-03 15:43:03,045 INFO L78 Accepts]: Start accepts. Automaton has 3715 states and 8876 transitions. Word has length 51 [2021-05-03 15:43:03,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:43:03,045 INFO L480 AbstractCegarLoop]: Abstraction has 3715 states and 8876 transitions. [2021-05-03 15:43:03,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 37 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:43:03,045 INFO L276 IsEmpty]: Start isEmpty. Operand 3715 states and 8876 transitions. [2021-05-03 15:43:03,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-05-03 15:43:03,050 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:43:03,050 INFO L551 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:43:03,267 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable266,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:43:03,267 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:43:03,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:43:03,267 INFO L82 PathProgramCache]: Analyzing trace with hash -607302967, now seen corresponding path program 76 times [2021-05-03 15:43:03,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:43:03,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194282714] [2021-05-03 15:43:03,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:43:03,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:43:04,081 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:43:04,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194282714] [2021-05-03 15:43:04,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568653578] [2021-05-03 15:43:04,081 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:43:04,109 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:43:04,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:43:04,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-03 15:43:04,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:43:06,771 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:43:06,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:43:06,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 47 [2021-05-03 15:43:06,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585072850] [2021-05-03 15:43:06,772 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-05-03 15:43:06,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:43:06,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-05-03 15:43:06,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=1843, Unknown=0, NotChecked=0, Total=2256 [2021-05-03 15:43:06,773 INFO L87 Difference]: Start difference. First operand 3715 states and 8876 transitions. Second operand has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 47 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:43:22,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:43:22,732 INFO L93 Difference]: Finished difference Result 5654 states and 12623 transitions. [2021-05-03 15:43:22,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2021-05-03 15:43:22,735 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 47 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-05-03 15:43:22,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:43:22,742 INFO L225 Difference]: With dead ends: 5654 [2021-05-03 15:43:22,742 INFO L226 Difference]: Without dead ends: 5342 [2021-05-03 15:43:22,761 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13205 ImplicationChecksByTransitivity, 14519.4ms TimeCoverageRelationStatistics Valid=9334, Invalid=26198, Unknown=0, NotChecked=0, Total=35532 [2021-05-03 15:43:22,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5342 states. [2021-05-03 15:43:22,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5342 to 3714. [2021-05-03 15:43:22,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3714 states, 3713 states have (on average 2.3859412873687047) internal successors, (8859), 3713 states have internal predecessors, (8859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:43:22,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3714 states to 3714 states and 8859 transitions. [2021-05-03 15:43:22,822 INFO L78 Accepts]: Start accepts. Automaton has 3714 states and 8859 transitions. Word has length 53 [2021-05-03 15:43:22,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:43:22,823 INFO L480 AbstractCegarLoop]: Abstraction has 3714 states and 8859 transitions. [2021-05-03 15:43:22,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 47 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:43:22,823 INFO L276 IsEmpty]: Start isEmpty. Operand 3714 states and 8859 transitions. [2021-05-03 15:43:22,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-05-03 15:43:22,828 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:43:22,828 INFO L551 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:43:23,028 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2021-05-03 15:43:23,029 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:43:23,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:43:23,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1343145563, now seen corresponding path program 77 times [2021-05-03 15:43:23,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:43:23,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213343446] [2021-05-03 15:43:23,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:43:23,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:43:23,491 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 91 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:43:23,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213343446] [2021-05-03 15:43:23,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450514063] [2021-05-03 15:43:23,492 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:43:23,541 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-05-03 15:43:23,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:43:23,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 15:43:23,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:43:26,289 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 91 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:43:26,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:43:26,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 25] total 37 [2021-05-03 15:43:26,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469479263] [2021-05-03 15:43:26,290 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-03 15:43:26,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:43:26,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-03 15:43:26,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=1128, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 15:43:26,291 INFO L87 Difference]: Start difference. First operand 3714 states and 8859 transitions. Second operand has 38 states, 38 states have (on average 2.5526315789473686) internal successors, (97), 37 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:43:55,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:43:55,554 INFO L93 Difference]: Finished difference Result 5232 states and 11847 transitions. [2021-05-03 15:43:55,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 236 states. [2021-05-03 15:43:55,559 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.5526315789473686) internal successors, (97), 37 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-05-03 15:43:55,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:43:55,566 INFO L225 Difference]: With dead ends: 5232 [2021-05-03 15:43:55,566 INFO L226 Difference]: Without dead ends: 5228 [2021-05-03 15:43:55,570 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 267 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32350 ImplicationChecksByTransitivity, 28074.8ms TimeCoverageRelationStatistics Valid=15661, Invalid=56431, Unknown=0, NotChecked=0, Total=72092 [2021-05-03 15:43:55,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5228 states. [2021-05-03 15:43:55,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5228 to 3714. [2021-05-03 15:43:55,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3714 states, 3713 states have (on average 2.3856719633719363) internal successors, (8858), 3713 states have internal predecessors, (8858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:43:55,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3714 states to 3714 states and 8858 transitions. [2021-05-03 15:43:55,625 INFO L78 Accepts]: Start accepts. Automaton has 3714 states and 8858 transitions. Word has length 53 [2021-05-03 15:43:55,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:43:55,625 INFO L480 AbstractCegarLoop]: Abstraction has 3714 states and 8858 transitions. [2021-05-03 15:43:55,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.5526315789473686) internal successors, (97), 37 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:43:55,625 INFO L276 IsEmpty]: Start isEmpty. Operand 3714 states and 8858 transitions. [2021-05-03 15:43:55,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-03 15:43:55,630 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:43:55,630 INFO L551 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:43:55,830 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-05-03 15:43:55,830 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:43:55,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:43:55,831 INFO L82 PathProgramCache]: Analyzing trace with hash -425284857, now seen corresponding path program 78 times [2021-05-03 15:43:55,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:43:55,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950814509] [2021-05-03 15:43:55,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:43:55,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:43:56,494 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 1 proven. 199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:43:56,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950814509] [2021-05-03 15:43:56,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100245766] [2021-05-03 15:43:56,494 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:43:56,530 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-05-03 15:43:56,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:43:56,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 15:43:56,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:43:57,129 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:43:57,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:43:57,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-05-03 15:43:57,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246199612] [2021-05-03 15:43:57,130 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 15:43:57,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:43:57,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 15:43:57,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-05-03 15:43:57,130 INFO L87 Difference]: Start difference. First operand 3714 states and 8858 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:43:58,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:43:58,035 INFO L93 Difference]: Finished difference Result 4862 states and 11399 transitions. [2021-05-03 15:43:58,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 15:43:58,038 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-05-03 15:43:58,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:43:58,044 INFO L225 Difference]: With dead ends: 4862 [2021-05-03 15:43:58,044 INFO L226 Difference]: Without dead ends: 4787 [2021-05-03 15:43:58,045 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 578.1ms TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-05-03 15:43:58,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4787 states. [2021-05-03 15:43:58,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4787 to 4330. [2021-05-03 15:43:58,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4330 states, 4329 states have (on average 2.414876414876415) internal successors, (10454), 4329 states have internal predecessors, (10454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:43:58,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4330 states to 4330 states and 10454 transitions. [2021-05-03 15:43:58,108 INFO L78 Accepts]: Start accepts. Automaton has 4330 states and 10454 transitions. Word has length 55 [2021-05-03 15:43:58,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:43:58,108 INFO L480 AbstractCegarLoop]: Abstraction has 4330 states and 10454 transitions. [2021-05-03 15:43:58,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:43:58,108 INFO L276 IsEmpty]: Start isEmpty. Operand 4330 states and 10454 transitions. [2021-05-03 15:43:58,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-03 15:43:58,113 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:43:58,113 INFO L551 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:43:58,314 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:43:58,314 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:43:58,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:43:58,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1144269145, now seen corresponding path program 79 times [2021-05-03 15:43:58,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:43:58,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057808193] [2021-05-03 15:43:58,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:43:58,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:43:59,900 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:43:59,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057808193] [2021-05-03 15:43:59,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750238265] [2021-05-03 15:43:59,901 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:43:59,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:43:59,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 61 conjunts are in the unsatisfiable core [2021-05-03 15:43:59,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:44:03,737 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:44:03,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:44:03,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 49 [2021-05-03 15:44:03,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993277493] [2021-05-03 15:44:03,738 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-05-03 15:44:03,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:44:03,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-05-03 15:44:03,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=2261, Unknown=0, NotChecked=0, Total=2450 [2021-05-03 15:44:03,739 INFO L87 Difference]: Start difference. First operand 4330 states and 10454 transitions. Second operand has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:44:27,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:44:27,100 INFO L93 Difference]: Finished difference Result 5933 states and 13623 transitions. [2021-05-03 15:44:27,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-05-03 15:44:27,102 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-05-03 15:44:27,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:44:27,110 INFO L225 Difference]: With dead ends: 5933 [2021-05-03 15:44:27,110 INFO L226 Difference]: Without dead ends: 5927 [2021-05-03 15:44:27,111 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4427 ImplicationChecksByTransitivity, 15304.7ms TimeCoverageRelationStatistics Valid=1222, Invalid=15548, Unknown=0, NotChecked=0, Total=16770 [2021-05-03 15:44:27,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5927 states. [2021-05-03 15:44:27,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5927 to 4297. [2021-05-03 15:44:27,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4297 states, 4296 states have (on average 2.416201117318436) internal successors, (10380), 4296 states have internal predecessors, (10380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:44:27,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4297 states to 4297 states and 10380 transitions. [2021-05-03 15:44:27,166 INFO L78 Accepts]: Start accepts. Automaton has 4297 states and 10380 transitions. Word has length 55 [2021-05-03 15:44:27,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:44:27,166 INFO L480 AbstractCegarLoop]: Abstraction has 4297 states and 10380 transitions. [2021-05-03 15:44:27,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:44:27,166 INFO L276 IsEmpty]: Start isEmpty. Operand 4297 states and 10380 transitions. [2021-05-03 15:44:27,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-03 15:44:27,171 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:44:27,171 INFO L551 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:44:27,371 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:44:27,372 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:44:27,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:44:27,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1722012963, now seen corresponding path program 80 times [2021-05-03 15:44:27,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:44:27,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740921202] [2021-05-03 15:44:27,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:44:27,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:44:28,372 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:44:28,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740921202] [2021-05-03 15:44:28,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24081366] [2021-05-03 15:44:28,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:44:28,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:44:28,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:44:28,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 58 conjunts are in the unsatisfiable core [2021-05-03 15:44:28,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:44:31,924 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:44:31,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:44:31,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 25] total 42 [2021-05-03 15:44:31,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903021521] [2021-05-03 15:44:31,925 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-03 15:44:31,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:44:31,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-03 15:44:31,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1617, Unknown=0, NotChecked=0, Total=1806 [2021-05-03 15:44:31,926 INFO L87 Difference]: Start difference. First operand 4297 states and 10380 transitions. Second operand has 43 states, 43 states have (on average 2.441860465116279) internal successors, (105), 42 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:45:04,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:45:04,219 INFO L93 Difference]: Finished difference Result 8896 states and 19852 transitions. [2021-05-03 15:45:04,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-05-03 15:45:04,223 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.441860465116279) internal successors, (105), 42 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-05-03 15:45:04,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:45:04,236 INFO L225 Difference]: With dead ends: 8896 [2021-05-03 15:45:04,236 INFO L226 Difference]: Without dead ends: 8872 [2021-05-03 15:45:04,237 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8420 ImplicationChecksByTransitivity, 17612.1ms TimeCoverageRelationStatistics Valid=2202, Invalid=23238, Unknown=0, NotChecked=0, Total=25440 [2021-05-03 15:45:04,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8872 states. [2021-05-03 15:45:04,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8872 to 4583. [2021-05-03 15:45:04,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4583 states, 4582 states have (on average 2.4203404626800524) internal successors, (11090), 4582 states have internal predecessors, (11090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:45:04,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4583 states to 4583 states and 11090 transitions. [2021-05-03 15:45:04,314 INFO L78 Accepts]: Start accepts. Automaton has 4583 states and 11090 transitions. Word has length 55 [2021-05-03 15:45:04,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:45:04,314 INFO L480 AbstractCegarLoop]: Abstraction has 4583 states and 11090 transitions. [2021-05-03 15:45:04,314 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.441860465116279) internal successors, (105), 42 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:45:04,314 INFO L276 IsEmpty]: Start isEmpty. Operand 4583 states and 11090 transitions. [2021-05-03 15:45:04,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-03 15:45:04,319 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:45:04,319 INFO L551 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:45:04,520 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:45:04,520 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:45:04,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:45:04,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1842588423, now seen corresponding path program 81 times [2021-05-03 15:45:04,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:45:04,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702320490] [2021-05-03 15:45:04,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:45:04,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:45:05,536 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 19 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:45:05,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702320490] [2021-05-03 15:45:05,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959412904] [2021-05-03 15:45:05,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:45:05,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-05-03 15:45:05,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:45:05,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 58 conjunts are in the unsatisfiable core [2021-05-03 15:45:05,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:45:09,864 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 13 [2021-05-03 15:45:10,147 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 19 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:45:10,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:45:10,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 26] total 41 [2021-05-03 15:45:10,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168454534] [2021-05-03 15:45:10,148 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-05-03 15:45:10,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:45:10,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-05-03 15:45:10,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1533, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 15:45:10,149 INFO L87 Difference]: Start difference. First operand 4583 states and 11090 transitions. Second operand has 42 states, 42 states have (on average 2.4047619047619047) internal successors, (101), 41 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:45:19,363 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 17 [2021-05-03 15:45:20,636 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 18 [2021-05-03 15:45:25,100 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2021-05-03 15:45:25,761 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 18 [2021-05-03 15:45:36,581 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2021-05-03 15:45:36,876 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 18 [2021-05-03 15:45:37,583 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2021-05-03 15:45:37,849 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 18 [2021-05-03 15:45:38,670 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 18 [2021-05-03 15:45:39,380 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2021-05-03 15:45:40,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:45:40,199 INFO L93 Difference]: Finished difference Result 6731 states and 15383 transitions. [2021-05-03 15:45:40,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-05-03 15:45:40,205 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.4047619047619047) internal successors, (101), 41 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-05-03 15:45:40,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:45:40,216 INFO L225 Difference]: With dead ends: 6731 [2021-05-03 15:45:40,216 INFO L226 Difference]: Without dead ends: 6727 [2021-05-03 15:45:40,217 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5320 ImplicationChecksByTransitivity, 17399.6ms TimeCoverageRelationStatistics Valid=1571, Invalid=15985, Unknown=0, NotChecked=0, Total=17556 [2021-05-03 15:45:40,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6727 states. [2021-05-03 15:45:40,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6727 to 4364. [2021-05-03 15:45:40,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4364 states, 4363 states have (on average 2.418748567499427) internal successors, (10553), 4363 states have internal predecessors, (10553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:45:40,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4364 states to 4364 states and 10553 transitions. [2021-05-03 15:45:40,292 INFO L78 Accepts]: Start accepts. Automaton has 4364 states and 10553 transitions. Word has length 55 [2021-05-03 15:45:40,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:45:40,293 INFO L480 AbstractCegarLoop]: Abstraction has 4364 states and 10553 transitions. [2021-05-03 15:45:40,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.4047619047619047) internal successors, (101), 41 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:45:40,293 INFO L276 IsEmpty]: Start isEmpty. Operand 4364 states and 10553 transitions. [2021-05-03 15:45:40,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-03 15:45:40,298 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:45:40,298 INFO L551 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:45:40,498 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:45:40,499 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:45:40,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:45:40,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1694161249, now seen corresponding path program 82 times [2021-05-03 15:45:40,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:45:40,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019610840] [2021-05-03 15:45:40,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:45:40,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:45:41,641 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 2 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:45:41,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019610840] [2021-05-03 15:45:41,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727944176] [2021-05-03 15:45:41,641 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:45:41,667 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:45:41,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:45:41,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 58 conjunts are in the unsatisfiable core [2021-05-03 15:45:41,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:45:45,748 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 15 [2021-05-03 15:45:45,793 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 2 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:45:45,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:45:45,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 25] total 43 [2021-05-03 15:45:45,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895411672] [2021-05-03 15:45:45,793 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-05-03 15:45:45,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:45:45,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-05-03 15:45:45,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1689, Unknown=0, NotChecked=0, Total=1892 [2021-05-03 15:45:45,794 INFO L87 Difference]: Start difference. First operand 4364 states and 10553 transitions. Second operand has 44 states, 44 states have (on average 2.3863636363636362) internal successors, (105), 43 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:46:16,895 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 17 [2021-05-03 15:46:19,221 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2021-05-03 15:46:19,585 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2021-05-03 15:46:20,243 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 17 [2021-05-03 15:46:22,321 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2021-05-03 15:46:22,594 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2021-05-03 15:46:25,076 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2021-05-03 15:46:25,392 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2021-05-03 15:46:25,999 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 17 [2021-05-03 15:46:26,574 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 17 [2021-05-03 15:46:28,959 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2021-05-03 15:46:29,342 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2021-05-03 15:46:30,025 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 17 [2021-05-03 15:46:31,841 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2021-05-03 15:46:32,175 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 18 [2021-05-03 15:46:32,779 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2021-05-03 15:46:33,908 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 18 [2021-05-03 15:46:34,227 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2021-05-03 15:46:34,867 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 15 [2021-05-03 15:46:35,545 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 20 [2021-05-03 15:46:37,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:46:37,769 INFO L93 Difference]: Finished difference Result 10574 states and 23371 transitions. [2021-05-03 15:46:37,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2021-05-03 15:46:37,773 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.3863636363636362) internal successors, (105), 43 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-05-03 15:46:37,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:46:37,790 INFO L225 Difference]: With dead ends: 10574 [2021-05-03 15:46:37,790 INFO L226 Difference]: Without dead ends: 10526 [2021-05-03 15:46:37,792 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13796 ImplicationChecksByTransitivity, 27387.4ms TimeCoverageRelationStatistics Valid=3843, Invalid=34769, Unknown=0, NotChecked=0, Total=38612 [2021-05-03 15:46:37,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10526 states. [2021-05-03 15:46:37,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10526 to 4384. [2021-05-03 15:46:37,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4384 states, 4383 states have (on average 2.4177503992699063) internal successors, (10597), 4383 states have internal predecessors, (10597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:46:37,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4384 states to 4384 states and 10597 transitions. [2021-05-03 15:46:37,913 INFO L78 Accepts]: Start accepts. Automaton has 4384 states and 10597 transitions. Word has length 55 [2021-05-03 15:46:37,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:46:37,913 INFO L480 AbstractCegarLoop]: Abstraction has 4384 states and 10597 transitions. [2021-05-03 15:46:37,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 2.3863636363636362) internal successors, (105), 43 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:46:37,913 INFO L276 IsEmpty]: Start isEmpty. Operand 4384 states and 10597 transitions. [2021-05-03 15:46:37,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-03 15:46:37,918 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:46:37,918 INFO L551 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:46:38,119 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2021-05-03 15:46:38,119 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:46:38,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:46:38,119 INFO L82 PathProgramCache]: Analyzing trace with hash 661255397, now seen corresponding path program 83 times [2021-05-03 15:46:38,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:46:38,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890741072] [2021-05-03 15:46:38,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:46:38,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:46:39,356 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 6 proven. 194 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:46:39,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890741072] [2021-05-03 15:46:39,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701323295] [2021-05-03 15:46:39,357 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:46:39,395 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-05-03 15:46:39,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:46:39,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-03 15:46:39,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:46:43,453 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 6 proven. 194 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:46:43,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:46:43,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 26] total 45 [2021-05-03 15:46:43,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224292766] [2021-05-03 15:46:43,454 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-05-03 15:46:43,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:46:43,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-05-03 15:46:43,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1840, Unknown=0, NotChecked=0, Total=2070 [2021-05-03 15:46:43,455 INFO L87 Difference]: Start difference. First operand 4384 states and 10597 transitions. Second operand has 46 states, 46 states have (on average 2.282608695652174) internal successors, (105), 45 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:47:05,427 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 18 [2021-05-03 15:47:06,367 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2021-05-03 15:47:06,690 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 17 [2021-05-03 15:47:07,028 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 13 [2021-05-03 15:47:08,272 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2021-05-03 15:47:09,839 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2021-05-03 15:47:10,187 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 17 [2021-05-03 15:47:17,022 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2021-05-03 15:47:18,024 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2021-05-03 15:47:18,217 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2021-05-03 15:47:19,733 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2021-05-03 15:47:20,005 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2021-05-03 15:47:20,473 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2021-05-03 15:47:22,044 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2021-05-03 15:47:22,957 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2021-05-03 15:47:25,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:47:25,647 INFO L93 Difference]: Finished difference Result 12886 states and 28355 transitions. [2021-05-03 15:47:25,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 174 states. [2021-05-03 15:47:25,653 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.282608695652174) internal successors, (105), 45 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-05-03 15:47:25,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:47:25,677 INFO L225 Difference]: With dead ends: 12886 [2021-05-03 15:47:25,677 INFO L226 Difference]: Without dead ends: 12808 [2021-05-03 15:47:25,679 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17184 ImplicationChecksByTransitivity, 27629.1ms TimeCoverageRelationStatistics Valid=5283, Invalid=40727, Unknown=0, NotChecked=0, Total=46010 [2021-05-03 15:47:25,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12808 states. [2021-05-03 15:47:25,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12808 to 4292. [2021-05-03 15:47:25,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4292 states, 4291 states have (on average 2.4150547657888604) internal successors, (10363), 4291 states have internal predecessors, (10363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:47:25,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4292 states to 4292 states and 10363 transitions. [2021-05-03 15:47:25,802 INFO L78 Accepts]: Start accepts. Automaton has 4292 states and 10363 transitions. Word has length 55 [2021-05-03 15:47:25,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:47:25,802 INFO L480 AbstractCegarLoop]: Abstraction has 4292 states and 10363 transitions. [2021-05-03 15:47:25,802 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.282608695652174) internal successors, (105), 45 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:47:25,802 INFO L276 IsEmpty]: Start isEmpty. Operand 4292 states and 10363 transitions. [2021-05-03 15:47:25,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-03 15:47:25,807 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:47:25,807 INFO L551 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:47:26,007 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2021-05-03 15:47:26,008 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:47:26,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:47:26,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1592574615, now seen corresponding path program 84 times [2021-05-03 15:47:26,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:47:26,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509307699] [2021-05-03 15:47:26,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:47:26,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:47:27,373 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 12 proven. 188 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:47:27,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509307699] [2021-05-03 15:47:27,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465334586] [2021-05-03 15:47:27,374 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 [2021-05-03 15:47:27,445 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-05-03 15:47:27,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:47:27,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 55 conjunts are in the unsatisfiable core [2021-05-03 15:47:27,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:47:31,734 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 12 proven. 188 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:47:31,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:47:31,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 26] total 46 [2021-05-03 15:47:31,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640430787] [2021-05-03 15:47:31,735 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-03 15:47:31,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:47:31,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-03 15:47:31,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=1912, Unknown=0, NotChecked=0, Total=2162 [2021-05-03 15:47:31,736 INFO L87 Difference]: Start difference. First operand 4292 states and 10363 transitions. Second operand has 47 states, 47 states have (on average 2.234042553191489) internal successors, (105), 46 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:47:38,666 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 18 [2021-05-03 15:47:38,915 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 16 [2021-05-03 15:47:42,122 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 17 [2021-05-03 15:47:43,516 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 15 [2021-05-03 15:47:45,208 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 16 [2021-05-03 15:47:45,581 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2021-05-03 15:47:45,903 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 17 [2021-05-03 15:47:46,194 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 16 [2021-05-03 15:47:48,807 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 17 [2021-05-03 15:47:50,582 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 18 [2021-05-03 15:47:50,975 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2021-05-03 15:47:52,473 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 16 [2021-05-03 15:47:55,835 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 17 [2021-05-03 15:47:57,314 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 18 [2021-05-03 15:47:59,965 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2021-05-03 15:48:03,547 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2021-05-03 15:48:04,340 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2021-05-03 15:48:04,564 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2021-05-03 15:48:05,044 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2021-05-03 15:48:05,453 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2021-05-03 15:48:06,374 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2021-05-03 15:48:06,587 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2021-05-03 15:48:07,422 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2021-05-03 15:48:08,171 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2021-05-03 15:48:08,363 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2021-05-03 15:48:10,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:48:10,498 INFO L93 Difference]: Finished difference Result 15118 states and 33071 transitions. [2021-05-03 15:48:10,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2021-05-03 15:48:10,505 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.234042553191489) internal successors, (105), 46 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-05-03 15:48:10,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:48:10,544 INFO L225 Difference]: With dead ends: 15118 [2021-05-03 15:48:10,545 INFO L226 Difference]: Without dead ends: 15004 [2021-05-03 15:48:10,548 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15794 ImplicationChecksByTransitivity, 27113.0ms TimeCoverageRelationStatistics Valid=5619, Invalid=36201, Unknown=0, NotChecked=0, Total=41820 [2021-05-03 15:48:10,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15004 states. [2021-05-03 15:48:10,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15004 to 4240. [2021-05-03 15:48:10,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4240 states, 4239 states have (on average 2.420146260910592) internal successors, (10259), 4239 states have internal predecessors, (10259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:48:10,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4240 states to 4240 states and 10259 transitions. [2021-05-03 15:48:10,718 INFO L78 Accepts]: Start accepts. Automaton has 4240 states and 10259 transitions. Word has length 55 [2021-05-03 15:48:10,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:48:10,719 INFO L480 AbstractCegarLoop]: Abstraction has 4240 states and 10259 transitions. [2021-05-03 15:48:10,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 2.234042553191489) internal successors, (105), 46 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:48:10,719 INFO L276 IsEmpty]: Start isEmpty. Operand 4240 states and 10259 transitions. [2021-05-03 15:48:10,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-03 15:48:10,725 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:48:10,725 INFO L551 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:48:10,926 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable306 [2021-05-03 15:48:10,926 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:48:10,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:48:10,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1315992301, now seen corresponding path program 85 times [2021-05-03 15:48:10,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:48:10,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956676154] [2021-05-03 15:48:10,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:48:10,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:48:12,282 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 20 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:48:12,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956676154] [2021-05-03 15:48:12,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303447302] [2021-05-03 15:48:12,282 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:48:12,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:48:12,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-03 15:48:12,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:48:16,711 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 15 [2021-05-03 15:48:16,767 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 20 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:48:16,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:48:16,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25] total 46 [2021-05-03 15:48:16,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063901990] [2021-05-03 15:48:16,768 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-03 15:48:16,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:48:16,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-03 15:48:16,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=1905, Unknown=0, NotChecked=0, Total=2162 [2021-05-03 15:48:16,769 INFO L87 Difference]: Start difference. First operand 4240 states and 10259 transitions. Second operand has 47 states, 47 states have (on average 2.234042553191489) internal successors, (105), 46 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:48:17,258 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2021-05-03 15:48:17,524 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2021-05-03 15:48:17,786 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2021-05-03 15:48:18,102 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 14 [2021-05-03 15:48:28,028 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 17 [2021-05-03 15:48:33,562 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 16 [2021-05-03 15:48:33,905 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 16 [2021-05-03 15:48:34,710 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 18 [2021-05-03 15:48:35,060 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 17 [2021-05-03 15:48:35,879 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 16 [2021-05-03 15:48:37,991 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 16 [2021-05-03 15:48:43,277 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-05-03 15:48:43,799 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-05-03 15:48:44,093 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-05-03 15:48:44,406 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-05-03 15:48:45,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:48:45,393 INFO L93 Difference]: Finished difference Result 17236 states and 37602 transitions. [2021-05-03 15:48:45,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2021-05-03 15:48:45,400 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.234042553191489) internal successors, (105), 46 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-05-03 15:48:45,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:48:45,432 INFO L225 Difference]: With dead ends: 17236 [2021-05-03 15:48:45,432 INFO L226 Difference]: Without dead ends: 16966 [2021-05-03 15:48:45,434 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9949 ImplicationChecksByTransitivity, 22840.0ms TimeCoverageRelationStatistics Valid=4135, Invalid=23255, Unknown=0, NotChecked=0, Total=27390 [2021-05-03 15:48:45,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16966 states. [2021-05-03 15:48:45,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16966 to 4264. [2021-05-03 15:48:45,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4264 states, 4263 states have (on average 2.4177809054656345) internal successors, (10307), 4263 states have internal predecessors, (10307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:48:45,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4264 states to 4264 states and 10307 transitions. [2021-05-03 15:48:45,635 INFO L78 Accepts]: Start accepts. Automaton has 4264 states and 10307 transitions. Word has length 55 [2021-05-03 15:48:45,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:48:45,635 INFO L480 AbstractCegarLoop]: Abstraction has 4264 states and 10307 transitions. [2021-05-03 15:48:45,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 2.234042553191489) internal successors, (105), 46 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:48:45,635 INFO L276 IsEmpty]: Start isEmpty. Operand 4264 states and 10307 transitions. [2021-05-03 15:48:45,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-03 15:48:45,640 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:48:45,640 INFO L551 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:48:45,858 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:48:45,858 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:48:45,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:48:45,859 INFO L82 PathProgramCache]: Analyzing trace with hash -469019279, now seen corresponding path program 86 times [2021-05-03 15:48:45,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:48:45,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201145251] [2021-05-03 15:48:45,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:48:45,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:48:47,400 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 30 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:48:47,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201145251] [2021-05-03 15:48:47,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830224032] [2021-05-03 15:48:47,403 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 [2021-05-03 15:48:47,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:48:47,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:48:47,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 15:48:47,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:48:51,637 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 30 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:48:51,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:48:51,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 47 [2021-05-03 15:48:51,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642772372] [2021-05-03 15:48:51,638 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-05-03 15:48:51,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:48:51,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-05-03 15:48:51,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=1974, Unknown=0, NotChecked=0, Total=2256 [2021-05-03 15:48:51,639 INFO L87 Difference]: Start difference. First operand 4264 states and 10307 transitions. Second operand has 48 states, 48 states have (on average 2.1875) internal successors, (105), 47 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:48:52,178 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2021-05-03 15:48:52,428 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2021-05-03 15:48:52,701 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2021-05-03 15:48:57,318 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 16 [2021-05-03 15:48:57,622 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 16 [2021-05-03 15:48:58,552 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 17 [2021-05-03 15:48:58,871 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2021-05-03 15:49:00,330 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 17 [2021-05-03 15:49:06,244 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 16 [2021-05-03 15:49:07,081 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 15 [2021-05-03 15:49:21,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:49:21,973 INFO L93 Difference]: Finished difference Result 18169 states and 39525 transitions. [2021-05-03 15:49:21,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2021-05-03 15:49:21,979 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.1875) internal successors, (105), 47 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-05-03 15:49:21,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:49:22,011 INFO L225 Difference]: With dead ends: 18169 [2021-05-03 15:49:22,011 INFO L226 Difference]: Without dead ends: 17716 [2021-05-03 15:49:22,013 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12252 ImplicationChecksByTransitivity, 24021.3ms TimeCoverageRelationStatistics Valid=5504, Invalid=27438, Unknown=0, NotChecked=0, Total=32942 [2021-05-03 15:49:22,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17716 states. [2021-05-03 15:49:22,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17716 to 4280. [2021-05-03 15:49:22,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4280 states, 4279 states have (on average 2.4162187426968917) internal successors, (10339), 4279 states have internal predecessors, (10339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:49:22,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4280 states to 4280 states and 10339 transitions. [2021-05-03 15:49:22,166 INFO L78 Accepts]: Start accepts. Automaton has 4280 states and 10339 transitions. Word has length 55 [2021-05-03 15:49:22,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:49:22,166 INFO L480 AbstractCegarLoop]: Abstraction has 4280 states and 10339 transitions. [2021-05-03 15:49:22,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 2.1875) internal successors, (105), 47 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:49:22,166 INFO L276 IsEmpty]: Start isEmpty. Operand 4280 states and 10339 transitions. [2021-05-03 15:49:22,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-03 15:49:22,171 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:49:22,171 INFO L551 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:49:22,371 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable319 [2021-05-03 15:49:22,371 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:49:22,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:49:22,372 INFO L82 PathProgramCache]: Analyzing trace with hash -897735435, now seen corresponding path program 87 times [2021-05-03 15:49:22,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:49:22,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871189575] [2021-05-03 15:49:22,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:49:22,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:49:24,118 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 42 proven. 158 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:49:24,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871189575] [2021-05-03 15:49:24,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427023815] [2021-05-03 15:49:24,118 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 [2021-05-03 15:49:24,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-05-03 15:49:24,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:49:24,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 15:49:24,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:49:29,177 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 15 [2021-05-03 15:49:29,243 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 42 proven. 158 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:49:29,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:49:29,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2021-05-03 15:49:29,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97039126] [2021-05-03 15:49:29,244 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-05-03 15:49:29,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:49:29,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-05-03 15:49:29,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=2039, Unknown=0, NotChecked=0, Total=2352 [2021-05-03 15:49:29,245 INFO L87 Difference]: Start difference. First operand 4280 states and 10339 transitions. Second operand has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:49:29,573 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2021-05-03 15:49:30,058 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2021-05-03 15:49:30,325 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2021-05-03 15:49:32,061 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2021-05-03 15:49:32,736 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 15 [2021-05-03 15:49:33,846 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 16 [2021-05-03 15:49:36,126 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 16 [2021-05-03 15:49:38,231 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 15 [2021-05-03 15:49:39,619 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 16 [2021-05-03 15:49:44,223 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 11 [2021-05-03 15:49:55,214 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2021-05-03 15:49:55,886 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-05-03 15:49:56,631 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-05-03 15:49:58,032 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-05-03 15:49:58,644 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-05-03 15:49:59,206 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-05-03 15:49:59,723 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-05-03 15:50:00,925 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-05-03 15:50:01,319 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-05-03 15:50:02,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:50:02,065 INFO L93 Difference]: Finished difference Result 15803 states and 33500 transitions. [2021-05-03 15:50:02,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2021-05-03 15:50:02,072 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-05-03 15:50:02,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:50:02,103 INFO L225 Difference]: With dead ends: 15803 [2021-05-03 15:50:02,103 INFO L226 Difference]: Without dead ends: 15200 [2021-05-03 15:50:02,105 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14062 ImplicationChecksByTransitivity, 28675.6ms TimeCoverageRelationStatistics Valid=7026, Invalid=30416, Unknown=0, NotChecked=0, Total=37442 [2021-05-03 15:50:02,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15200 states. [2021-05-03 15:50:02,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15200 to 4292. [2021-05-03 15:50:02,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4292 states, 4291 states have (on average 2.4150547657888604) internal successors, (10363), 4291 states have internal predecessors, (10363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:02,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4292 states to 4292 states and 10363 transitions. [2021-05-03 15:50:02,288 INFO L78 Accepts]: Start accepts. Automaton has 4292 states and 10363 transitions. Word has length 55 [2021-05-03 15:50:02,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:50:02,288 INFO L480 AbstractCegarLoop]: Abstraction has 4292 states and 10363 transitions. [2021-05-03 15:50:02,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:02,288 INFO L276 IsEmpty]: Start isEmpty. Operand 4292 states and 10363 transitions. [2021-05-03 15:50:02,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-03 15:50:02,295 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:50:02,295 INFO L551 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:50:02,496 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable331 [2021-05-03 15:50:02,497 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:50:02,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:50:02,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1703861895, now seen corresponding path program 88 times [2021-05-03 15:50:02,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:50:02,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742070005] [2021-05-03 15:50:02,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:50:02,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:50:04,718 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 56 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:50:04,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742070005] [2021-05-03 15:50:04,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268354190] [2021-05-03 15:50:04,718 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 [2021-05-03 15:50:04,751 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:50:04,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:50:04,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 15:50:04,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:50:10,652 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 15 [2021-05-03 15:50:10,740 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 56 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:50:10,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:50:10,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 49 [2021-05-03 15:50:10,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109300017] [2021-05-03 15:50:10,741 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-05-03 15:50:10,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:50:10,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-05-03 15:50:10,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=2100, Unknown=0, NotChecked=0, Total=2450 [2021-05-03 15:50:10,742 INFO L87 Difference]: Start difference. First operand 4292 states and 10363 transitions. Second operand has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:50:11,084 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2021-05-03 15:50:11,340 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2021-05-03 15:50:11,722 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2021-05-03 15:50:12,015 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2021-05-03 15:50:13,001 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2021-05-03 15:50:13,273 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 12 [2021-05-03 15:50:13,681 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 15 [2021-05-03 15:50:14,061 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 13 [2021-05-03 15:50:14,697 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 15 [2021-05-03 15:50:15,755 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2021-05-03 15:50:16,423 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2021-05-03 15:50:17,240 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 12 [2021-05-03 15:50:20,283 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 13 [2021-05-03 15:50:20,682 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 13 [2021-05-03 15:50:21,629 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 12 [2021-05-03 15:50:23,163 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 12 Received shutdown request... [2021-05-03 15:50:24,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-03 15:50:24,823 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable347,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:50:24,824 WARN L545 AbstractCegarLoop]: Verification canceled [2021-05-03 15:50:24,829 WARN L224 ceAbstractionStarter]: Timeout [2021-05-03 15:50:24,829 INFO L202 PluginConnector]: Adding new model nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.05 03:50:24 BasicIcfg [2021-05-03 15:50:24,829 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-03 15:50:24,830 INFO L168 Benchmark]: Toolchain (without parser) took 829533.79 ms. Allocated memory was 337.6 MB in the beginning and 524.3 MB in the end (delta: 186.6 MB). Free memory was 317.3 MB in the beginning and 327.3 MB in the end (delta: -10.0 MB). Peak memory consumption was 179.7 MB. Max. memory is 16.0 GB. [2021-05-03 15:50:24,830 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.23 ms. Allocated memory is still 337.6 MB. Free memory was 318.4 MB in the beginning and 318.3 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-03 15:50:24,830 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.25 ms. Allocated memory is still 337.6 MB. Free memory was 317.2 MB in the beginning and 315.8 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-03 15:50:24,830 INFO L168 Benchmark]: Boogie Preprocessor took 21.88 ms. Allocated memory is still 337.6 MB. Free memory was 315.8 MB in the beginning and 314.8 MB in the end (delta: 961.1 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-03 15:50:24,831 INFO L168 Benchmark]: RCFGBuilder took 411.66 ms. Allocated memory is still 337.6 MB. Free memory was 314.8 MB in the beginning and 303.1 MB in the end (delta: 11.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-05-03 15:50:24,831 INFO L168 Benchmark]: TraceAbstraction took 829054.17 ms. Allocated memory was 337.6 MB in the beginning and 524.3 MB in the end (delta: 186.6 MB). Free memory was 302.7 MB in the beginning and 327.3 MB in the end (delta: -24.6 MB). Peak memory consumption was 165.1 MB. Max. memory is 16.0 GB. [2021-05-03 15:50:24,831 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 0.23 ms. Allocated memory is still 337.6 MB. Free memory was 318.4 MB in the beginning and 318.3 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 37.25 ms. Allocated memory is still 337.6 MB. Free memory was 317.2 MB in the beginning and 315.8 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 21.88 ms. Allocated memory is still 337.6 MB. Free memory was 315.8 MB in the beginning and 314.8 MB in the end (delta: 961.1 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 411.66 ms. Allocated memory is still 337.6 MB. Free memory was 314.8 MB in the beginning and 303.1 MB in the end (delta: 11.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 829054.17 ms. Allocated memory was 337.6 MB in the beginning and 524.3 MB in the end (delta: 186.6 MB). Free memory was 302.7 MB in the beginning and 327.3 MB in the end (delta: -24.6 MB). Peak memory consumption was 165.1 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 (line 50). Cancelled while BasicCegarLoop was constructing difference of abstraction (4292states) and FLOYD_HOARE automaton (currently 54 states, 50 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 99 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 828894.3ms, OverallIterations: 90, TraceHistogramMax: 10, EmptinessCheckTime: 280.9ms, AutomataDifference: 673859.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 57.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 4420 SDtfs, 33838 SDslu, 62340 SDs, 0 SdLazy, 155672 SolverSat, 10332 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 91197.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11408 GetRequests, 2521 SyntacticMatches, 60 SemanticMatches, 8826 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440985 ImplicationChecksByTransitivity, 505198.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=4583occurred in iteration=82, InterpolantAutomatonStates: 6717, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 4480.5ms AutomataMinimizationTime, 89 MinimizatonAttempts, 256993 StatesRemovedByMinimization, 89 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 363.0ms SsaConstructionTime, 1874.8ms SatisfiabilityAnalysisTime, 127345.6ms InterpolantComputationTime, 7244 NumberOfCodeBlocks, 7244 NumberOfCodeBlocksAsserted, 542 NumberOfCheckSat, 7066 ConstructedInterpolants, 0 QuantifiedInterpolants, 62130 SizeOfPredicates, 315 NumberOfNonLiveVariables, 8267 ConjunctsInSsa, 2885 ConjunctsInUnsatCore, 178 InterpolantComputations, 2 PerfectInterpolantSequences, 2773/17231 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