/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/buffer-mult-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d47b94137d5c7dd60722882962a90fb345e61909-d47b941 [2021-05-03 16:04:39,850 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-03 16:04:39,852 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-03 16:04:39,874 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-03 16:04:39,875 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-03 16:04:39,876 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-03 16:04:39,877 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-03 16:04:39,879 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-03 16:04:39,881 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-03 16:04:39,882 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-03 16:04:39,883 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-03 16:04:39,884 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-03 16:04:39,884 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-03 16:04:39,885 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-03 16:04:39,886 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-03 16:04:39,886 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-03 16:04:39,887 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-03 16:04:39,888 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-03 16:04:39,889 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-03 16:04:39,890 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-03 16:04:39,891 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-03 16:04:39,892 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-03 16:04:39,893 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-03 16:04:39,894 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-03 16:04:39,896 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-03 16:04:39,898 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-03 16:04:39,899 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-03 16:04:39,899 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-03 16:04:39,900 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-03 16:04:39,901 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-03 16:04:39,901 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-03 16:04:39,901 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-03 16:04:39,901 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-03 16:04:39,902 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-03 16:04:39,902 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-03 16:04:39,903 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-03 16:04:39,904 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-05-03 16:04:39,922 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-03 16:04:39,923 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-03 16:04:39,924 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-03 16:04:39,924 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-03 16:04:39,928 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-03 16:04:39,929 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-03 16:04:39,929 INFO L138 SettingsManager]: * Use SBE=true [2021-05-03 16:04:39,929 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-03 16:04:39,929 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-03 16:04:39,929 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-03 16:04:39,930 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-03 16:04:39,930 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-03 16:04:39,930 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-03 16:04:39,930 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-03 16:04:39,930 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-03 16:04:39,931 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-03 16:04:39,931 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-03 16:04:39,931 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-03 16:04:39,931 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-03 16:04:39,931 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-03 16:04:39,931 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-03 16:04:39,931 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-03 16:04:39,931 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-03 16:04:39,931 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 16:04:39,931 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-03 16:04:39,931 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-03 16:04:39,932 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-03 16:04:39,932 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-03 16:04:39,932 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-03 16:04:39,932 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-03 16:04:39,932 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-03 16:04:39,932 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-03 16:04:40,209 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-03 16:04:40,238 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-03 16:04:40,241 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-03 16:04:40,242 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-03 16:04:40,244 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-03 16:04:40,244 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/buffer-mult-alt.wvr.bpl [2021-05-03 16:04:40,259 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/buffer-mult-alt.wvr.bpl' [2021-05-03 16:04:40,282 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-03 16:04:40,283 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-03 16:04:40,285 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-03 16:04:40,285 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-03 16:04:40,285 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-03 16:04:40,298 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:04:40" (1/1) ... [2021-05-03 16:04:40,308 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:04:40" (1/1) ... [2021-05-03 16:04:40,316 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-03 16:04:40,318 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-03 16:04:40,319 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-03 16:04:40,320 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-03 16:04:40,327 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:04:40" (1/1) ... [2021-05-03 16:04:40,327 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:04:40" (1/1) ... [2021-05-03 16:04:40,328 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:04:40" (1/1) ... [2021-05-03 16:04:40,328 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:04:40" (1/1) ... [2021-05-03 16:04:40,336 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:04:40" (1/1) ... [2021-05-03 16:04:40,344 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:04:40" (1/1) ... [2021-05-03 16:04:40,345 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:04:40" (1/1) ... [2021-05-03 16:04:40,349 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-03 16:04:40,350 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-03 16:04:40,350 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-03 16:04:40,351 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-03 16:04:40,352 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:04:40" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 16:04:40,433 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-03 16:04:40,434 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-03 16:04:40,434 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-03 16:04:40,434 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-03 16:04:40,434 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-03 16:04:40,434 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-03 16:04:40,434 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-03 16:04:40,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-03 16:04:40,435 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-03 16:04:40,435 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-05-03 16:04:40,435 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-05-03 16:04:40,435 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-05-03 16:04:40,437 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-05-03 16:04:40,437 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-05-03 16:04:40,437 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-05-03 16:04:40,438 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-03 16:04:40,663 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-03 16:04:40,663 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-03 16:04:40,665 INFO L202 PluginConnector]: Adding new model buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 04:04:40 BoogieIcfgContainer [2021-05-03 16:04:40,665 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-03 16:04:40,667 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-03 16:04:40,667 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-03 16:04:40,670 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-03 16:04:40,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 04:04:40" (1/2) ... [2021-05-03 16:04:40,671 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@201c1c27 and model type buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 04:04:40, skipping insertion in model container [2021-05-03 16:04:40,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 04:04:40" (2/2) ... [2021-05-03 16:04:40,673 INFO L111 eAbstractionObserver]: Analyzing ICFG buffer-mult-alt.wvr.bpl [2021-05-03 16:04:40,678 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-03 16:04:40,678 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-03 16:04:40,682 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-03 16:04:40,683 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-03 16:04:40,751 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-05-03 16:04:40,766 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-05-03 16:04:40,783 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-03 16:04:40,783 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-03 16:04:40,784 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-03 16:04:40,784 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-03 16:04:40,784 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-03 16:04:40,785 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-03 16:04:40,785 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-03 16:04:40,786 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-03 16:04:40,806 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 44 places, 35 transitions, 102 flow [2021-05-03 16:04:40,896 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 637 states, 635 states have (on average 3.8866141732283466) internal successors, (2468), 636 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:40,900 INFO L276 IsEmpty]: Start isEmpty. Operand has 637 states, 635 states have (on average 3.8866141732283466) internal successors, (2468), 636 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:40,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 16:04:40,924 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:04:40,925 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 16:04:40,926 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:04:40,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:04:40,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1014933584, now seen corresponding path program 1 times [2021-05-03 16:04:40,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:04:40,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962507418] [2021-05-03 16:04:40,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:04:41,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:04:41,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:04:41,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962507418] [2021-05-03 16:04:41,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 16:04:41,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-03 16:04:41,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923165897] [2021-05-03 16:04:41,121 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-03 16:04:41,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:04:41,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-03 16:04:41,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 16:04:41,142 INFO L87 Difference]: Start difference. First operand has 637 states, 635 states have (on average 3.8866141732283466) internal successors, (2468), 636 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:41,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:04:41,220 INFO L93 Difference]: Finished difference Result 691 states and 2633 transitions. [2021-05-03 16:04:41,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-03 16:04:41,222 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 16:04:41,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:04:41,248 INFO L225 Difference]: With dead ends: 691 [2021-05-03 16:04:41,248 INFO L226 Difference]: Without dead ends: 691 [2021-05-03 16:04:41,249 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 16:04:41,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2021-05-03 16:04:41,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 691. [2021-05-03 16:04:41,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 691 states, 690 states have (on average 3.815942028985507) internal successors, (2633), 690 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 16:04:41,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 2633 transitions. [2021-05-03 16:04:41,367 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 2633 transitions. Word has length 19 [2021-05-03 16:04:41,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:04:41,367 INFO L480 AbstractCegarLoop]: Abstraction has 691 states and 2633 transitions. [2021-05-03 16:04:41,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:41,368 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 2633 transitions. [2021-05-03 16:04:41,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 16:04:41,372 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:04:41,373 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:04:41,373 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-03 16:04:41,373 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:04:41,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:04:41,378 INFO L82 PathProgramCache]: Analyzing trace with hash 810519764, now seen corresponding path program 1 times [2021-05-03 16:04:41,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:04:41,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691716178] [2021-05-03 16:04:41,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:04:41,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:04:41,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:04:41,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691716178] [2021-05-03 16:04:41,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732649713] [2021-05-03 16:04:41,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:04:41,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:04:41,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-03 16:04:41,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:04:41,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:04:41,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-05-03 16:04:41,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2021-05-03 16:04:41,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713528322] [2021-05-03 16:04:41,708 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 16:04:41,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:04:41,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 16:04:41,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 16:04:41,709 INFO L87 Difference]: Start difference. First operand 691 states and 2633 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:41,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:04:41,763 INFO L93 Difference]: Finished difference Result 1250 states and 4705 transitions. [2021-05-03 16:04:41,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-03 16:04:41,765 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 16:04:41,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:04:41,773 INFO L225 Difference]: With dead ends: 1250 [2021-05-03 16:04:41,773 INFO L226 Difference]: Without dead ends: 1250 [2021-05-03 16:04:41,774 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 16:04:41,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2021-05-03 16:04:41,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 815. [2021-05-03 16:04:41,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 815 states, 814 states have (on average 3.839066339066339) internal successors, (3125), 814 states have internal predecessors, (3125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:41,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 815 states to 815 states and 3125 transitions. [2021-05-03 16:04:41,812 INFO L78 Accepts]: Start accepts. Automaton has 815 states and 3125 transitions. Word has length 22 [2021-05-03 16:04:41,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:04:41,813 INFO L480 AbstractCegarLoop]: Abstraction has 815 states and 3125 transitions. [2021-05-03 16:04:41,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:41,814 INFO L276 IsEmpty]: Start isEmpty. Operand 815 states and 3125 transitions. [2021-05-03 16:04:41,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 16:04:41,820 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:04:41,820 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:04:42,037 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-03 16:04:42,037 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:04:42,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:04:42,038 INFO L82 PathProgramCache]: Analyzing trace with hash 234896854, now seen corresponding path program 1 times [2021-05-03 16:04:42,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:04:42,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282339893] [2021-05-03 16:04:42,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:04:42,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:04:42,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:04:42,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282339893] [2021-05-03 16:04:42,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491294078] [2021-05-03 16:04:42,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:04:42,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:04:42,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 16:04:42,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:04:42,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-05-03 16:04:42,216 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:42,218 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:42,219 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:04:42,219 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-05-03 16:04:42,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:04:42,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:04:42,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-05-03 16:04:42,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970671050] [2021-05-03 16:04:42,247 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 16:04:42,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:04:42,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 16:04:42,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-03 16:04:42,255 INFO L87 Difference]: Start difference. First operand 815 states and 3125 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:42,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:04:42,378 INFO L93 Difference]: Finished difference Result 1934 states and 7455 transitions. [2021-05-03 16:04:42,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 16:04:42,378 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 16:04:42,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:04:42,399 INFO L225 Difference]: With dead ends: 1934 [2021-05-03 16:04:42,400 INFO L226 Difference]: Without dead ends: 1807 [2021-05-03 16:04:42,400 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 31.1ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-03 16:04:42,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1807 states. [2021-05-03 16:04:42,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1807 to 1306. [2021-05-03 16:04:42,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1306 states, 1305 states have (on average 3.8521072796934868) internal successors, (5027), 1305 states have internal predecessors, (5027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:42,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1306 states to 1306 states and 5027 transitions. [2021-05-03 16:04:42,452 INFO L78 Accepts]: Start accepts. Automaton has 1306 states and 5027 transitions. Word has length 24 [2021-05-03 16:04:42,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:04:42,453 INFO L480 AbstractCegarLoop]: Abstraction has 1306 states and 5027 transitions. [2021-05-03 16:04:42,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:42,454 INFO L276 IsEmpty]: Start isEmpty. Operand 1306 states and 5027 transitions. [2021-05-03 16:04:42,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:04:42,458 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:04:42,458 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:04:42,668 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:04:42,669 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:04:42,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:04:42,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1112061528, now seen corresponding path program 2 times [2021-05-03 16:04:42,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:04:42,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726042969] [2021-05-03 16:04:42,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:04:42,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:04:42,710 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:04:42,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726042969] [2021-05-03 16:04:42,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51916494] [2021-05-03 16:04:42,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:04:42,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:04:42,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:04:42,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-03 16:04:42,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:04:42,822 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:04:42,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:04:42,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-05-03 16:04:42,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623954400] [2021-05-03 16:04:42,823 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 16:04:42,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:04:42,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 16:04:42,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-03 16:04:42,823 INFO L87 Difference]: Start difference. First operand 1306 states and 5027 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:42,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:04:42,885 INFO L93 Difference]: Finished difference Result 2404 states and 8959 transitions. [2021-05-03 16:04:42,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 16:04:42,887 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 16:04:42,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:04:42,902 INFO L225 Difference]: With dead ends: 2404 [2021-05-03 16:04:42,902 INFO L226 Difference]: Without dead ends: 2234 [2021-05-03 16:04:42,902 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 26.7ms TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-05-03 16:04:42,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2234 states. [2021-05-03 16:04:42,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2234 to 1906. [2021-05-03 16:04:42,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1906 states, 1905 states have (on average 3.859317585301837) internal successors, (7352), 1905 states have internal predecessors, (7352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:42,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1906 states to 1906 states and 7352 transitions. [2021-05-03 16:04:42,992 INFO L78 Accepts]: Start accepts. Automaton has 1906 states and 7352 transitions. Word has length 26 [2021-05-03 16:04:42,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:04:42,993 INFO L480 AbstractCegarLoop]: Abstraction has 1906 states and 7352 transitions. [2021-05-03 16:04:42,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:42,993 INFO L276 IsEmpty]: Start isEmpty. Operand 1906 states and 7352 transitions. [2021-05-03 16:04:42,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 16:04:42,999 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:04:42,999 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:04:43,215 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:04:43,215 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:04:43,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:04:43,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1469512084, now seen corresponding path program 1 times [2021-05-03 16:04:43,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:04:43,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780938700] [2021-05-03 16:04:43,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:04:43,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:04:43,265 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 16:04:43,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780938700] [2021-05-03 16:04:43,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 16:04:43,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 16:04:43,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310720487] [2021-05-03 16:04:43,266 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 16:04:43,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:04:43,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 16:04:43,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-03 16:04:43,267 INFO L87 Difference]: Start difference. First operand 1906 states and 7352 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 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 16:04:43,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:04:43,311 INFO L93 Difference]: Finished difference Result 3426 states and 12683 transitions. [2021-05-03 16:04:43,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-03 16:04:43,311 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 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 26 [2021-05-03 16:04:43,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:04:43,332 INFO L225 Difference]: With dead ends: 3426 [2021-05-03 16:04:43,332 INFO L226 Difference]: Without dead ends: 3255 [2021-05-03 16:04:43,333 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-03 16:04:43,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3255 states. [2021-05-03 16:04:43,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3255 to 2791. [2021-05-03 16:04:43,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2791 states, 2790 states have (on average 3.8562724014336918) internal successors, (10759), 2790 states have internal predecessors, (10759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:43,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2791 states to 2791 states and 10759 transitions. [2021-05-03 16:04:43,483 INFO L78 Accepts]: Start accepts. Automaton has 2791 states and 10759 transitions. Word has length 26 [2021-05-03 16:04:43,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:04:43,483 INFO L480 AbstractCegarLoop]: Abstraction has 2791 states and 10759 transitions. [2021-05-03 16:04:43,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 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 16:04:43,483 INFO L276 IsEmpty]: Start isEmpty. Operand 2791 states and 10759 transitions. [2021-05-03 16:04:43,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 16:04:43,491 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:04:43,491 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:04:43,491 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-03 16:04:43,491 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:04:43,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:04:43,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1414582092, now seen corresponding path program 3 times [2021-05-03 16:04:43,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:04:43,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634985900] [2021-05-03 16:04:43,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:04:43,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:04:43,563 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:04:43,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634985900] [2021-05-03 16:04:43,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940118383] [2021-05-03 16:04:43,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:04:43,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 16:04:43,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:04:43,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 16:04:43,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:04:43,757 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-05-03 16:04:43,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 12 [2021-05-03 16:04:43,762 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:43,764 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:43,765 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:04:43,765 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:3 [2021-05-03 16:04:43,791 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:04:43,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:04:43,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-05-03 16:04:43,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90970237] [2021-05-03 16:04:43,792 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 16:04:43,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:04:43,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 16:04:43,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-03 16:04:43,793 INFO L87 Difference]: Start difference. First operand 2791 states and 10759 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:44,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:04:44,317 INFO L93 Difference]: Finished difference Result 7730 states and 29466 transitions. [2021-05-03 16:04:44,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 16:04:44,317 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 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 29 [2021-05-03 16:04:44,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:04:44,378 INFO L225 Difference]: With dead ends: 7730 [2021-05-03 16:04:44,379 INFO L226 Difference]: Without dead ends: 7083 [2021-05-03 16:04:44,379 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 204.4ms TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-05-03 16:04:44,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7083 states. [2021-05-03 16:04:44,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7083 to 2938. [2021-05-03 16:04:44,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2938 states, 2937 states have (on average 3.892066734763364) internal successors, (11431), 2937 states have internal predecessors, (11431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:44,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 11431 transitions. [2021-05-03 16:04:44,599 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 11431 transitions. Word has length 29 [2021-05-03 16:04:44,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:04:44,599 INFO L480 AbstractCegarLoop]: Abstraction has 2938 states and 11431 transitions. [2021-05-03 16:04:44,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:44,599 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 11431 transitions. [2021-05-03 16:04:44,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 16:04:44,609 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:04:44,609 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:04:44,825 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:04:44,825 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:04:44,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:04:44,826 INFO L82 PathProgramCache]: Analyzing trace with hash -690178897, now seen corresponding path program 1 times [2021-05-03 16:04:44,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:04:44,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564850633] [2021-05-03 16:04:44,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:04:44,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:04:44,867 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 16:04:44,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564850633] [2021-05-03 16:04:44,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 16:04:44,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 16:04:44,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543456373] [2021-05-03 16:04:44,868 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-03 16:04:44,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:04:44,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-03 16:04:44,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 16:04:44,869 INFO L87 Difference]: Start difference. First operand 2938 states and 11431 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:44,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:04:44,900 INFO L93 Difference]: Finished difference Result 2938 states and 11171 transitions. [2021-05-03 16:04:44,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-03 16:04:44,900 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 16:04:44,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:04:44,916 INFO L225 Difference]: With dead ends: 2938 [2021-05-03 16:04:44,916 INFO L226 Difference]: Without dead ends: 2938 [2021-05-03 16:04:44,916 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 16:04:44,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2938 states. [2021-05-03 16:04:45,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2938 to 2938. [2021-05-03 16:04:45,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2938 states, 2937 states have (on average 3.8035410282601294) internal successors, (11171), 2937 states have internal predecessors, (11171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:45,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 11171 transitions. [2021-05-03 16:04:45,102 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 11171 transitions. Word has length 29 [2021-05-03 16:04:45,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:04:45,102 INFO L480 AbstractCegarLoop]: Abstraction has 2938 states and 11171 transitions. [2021-05-03 16:04:45,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:45,103 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 11171 transitions. [2021-05-03 16:04:45,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 16:04:45,112 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:04:45,112 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:04:45,112 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-03 16:04:45,112 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:04:45,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:04:45,113 INFO L82 PathProgramCache]: Analyzing trace with hash 866424555, now seen corresponding path program 2 times [2021-05-03 16:04:45,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:04:45,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11555453] [2021-05-03 16:04:45,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:04:45,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:04:45,174 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 16:04:45,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11555453] [2021-05-03 16:04:45,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206054060] [2021-05-03 16:04:45,175 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 16:04:45,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:04:45,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:04:45,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 16:04:45,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:04:45,292 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 16:04:45,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:04:45,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-05-03 16:04:45,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530173889] [2021-05-03 16:04:45,293 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 16:04:45,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:04:45,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 16:04:45,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-05-03 16:04:45,293 INFO L87 Difference]: Start difference. First operand 2938 states and 11171 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:45,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:04:45,593 INFO L93 Difference]: Finished difference Result 9089 states and 33364 transitions. [2021-05-03 16:04:45,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 16:04:45,594 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 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 29 [2021-05-03 16:04:45,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:04:45,635 INFO L225 Difference]: With dead ends: 9089 [2021-05-03 16:04:45,636 INFO L226 Difference]: Without dead ends: 9039 [2021-05-03 16:04:45,636 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 99.4ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-05-03 16:04:45,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9039 states. [2021-05-03 16:04:45,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9039 to 3700. [2021-05-03 16:04:45,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3700 states, 3699 states have (on average 3.9689105163557716) internal successors, (14681), 3699 states have internal predecessors, (14681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:45,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3700 states to 3700 states and 14681 transitions. [2021-05-03 16:04:45,905 INFO L78 Accepts]: Start accepts. Automaton has 3700 states and 14681 transitions. Word has length 29 [2021-05-03 16:04:45,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:04:45,905 INFO L480 AbstractCegarLoop]: Abstraction has 3700 states and 14681 transitions. [2021-05-03 16:04:45,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:45,905 INFO L276 IsEmpty]: Start isEmpty. Operand 3700 states and 14681 transitions. [2021-05-03 16:04:45,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 16:04:45,918 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:04:45,918 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:04:46,132 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:04:46,133 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:04:46,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:04:46,133 INFO L82 PathProgramCache]: Analyzing trace with hash -595430549, now seen corresponding path program 3 times [2021-05-03 16:04:46,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:04:46,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068658095] [2021-05-03 16:04:46,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:04:46,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:04:46,175 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 16:04:46,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068658095] [2021-05-03 16:04:46,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611341322] [2021-05-03 16:04:46,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:04:46,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 16:04:46,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:04:46,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 16:04:46,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:04:46,312 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 16:04:46,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:04:46,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-05-03 16:04:46,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387875568] [2021-05-03 16:04:46,315 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 16:04:46,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:04:46,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 16:04:46,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-05-03 16:04:46,316 INFO L87 Difference]: Start difference. First operand 3700 states and 14681 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:46,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:04:46,612 INFO L93 Difference]: Finished difference Result 8113 states and 29971 transitions. [2021-05-03 16:04:46,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 16:04:46,613 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 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 29 [2021-05-03 16:04:46,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:04:46,647 INFO L225 Difference]: With dead ends: 8113 [2021-05-03 16:04:46,648 INFO L226 Difference]: Without dead ends: 8113 [2021-05-03 16:04:46,648 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 105.7ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-05-03 16:04:46,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8113 states. [2021-05-03 16:04:46,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8113 to 3985. [2021-05-03 16:04:46,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3985 states, 3984 states have (on average 3.9485441767068274) internal successors, (15731), 3984 states have internal predecessors, (15731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:46,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3985 states to 3985 states and 15731 transitions. [2021-05-03 16:04:46,844 INFO L78 Accepts]: Start accepts. Automaton has 3985 states and 15731 transitions. Word has length 29 [2021-05-03 16:04:46,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:04:46,845 INFO L480 AbstractCegarLoop]: Abstraction has 3985 states and 15731 transitions. [2021-05-03 16:04:46,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:46,845 INFO L276 IsEmpty]: Start isEmpty. Operand 3985 states and 15731 transitions. [2021-05-03 16:04:46,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-03 16:04:46,859 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:04:46,859 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:04:47,073 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:04:47,075 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:04:47,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:04:47,076 INFO L82 PathProgramCache]: Analyzing trace with hash 805726646, now seen corresponding path program 4 times [2021-05-03 16:04:47,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:04:47,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074732149] [2021-05-03 16:04:47,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:04:47,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:04:47,127 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:04:47,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074732149] [2021-05-03 16:04:47,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864945632] [2021-05-03 16:04:47,128 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:04:47,160 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:04:47,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:04:47,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 16:04:47,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:04:47,252 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:04:47,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:04:47,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 8 [2021-05-03 16:04:47,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573406586] [2021-05-03 16:04:47,252 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 16:04:47,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:04:47,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 16:04:47,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-03 16:04:47,253 INFO L87 Difference]: Start difference. First operand 3985 states and 15731 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:47,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:04:47,349 INFO L93 Difference]: Finished difference Result 7893 states and 31090 transitions. [2021-05-03 16:04:47,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 16:04:47,349 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 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 31 [2021-05-03 16:04:47,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:04:47,385 INFO L225 Difference]: With dead ends: 7893 [2021-05-03 16:04:47,386 INFO L226 Difference]: Without dead ends: 7621 [2021-05-03 16:04:47,386 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 38.6ms TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-05-03 16:04:47,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7621 states. [2021-05-03 16:04:47,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7621 to 6363. [2021-05-03 16:04:47,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6363 states, 6362 states have (on average 4.042125117887457) internal successors, (25716), 6362 states have internal predecessors, (25716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:47,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6363 states to 6363 states and 25716 transitions. [2021-05-03 16:04:47,639 INFO L78 Accepts]: Start accepts. Automaton has 6363 states and 25716 transitions. Word has length 31 [2021-05-03 16:04:47,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:04:47,639 INFO L480 AbstractCegarLoop]: Abstraction has 6363 states and 25716 transitions. [2021-05-03 16:04:47,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:47,639 INFO L276 IsEmpty]: Start isEmpty. Operand 6363 states and 25716 transitions. [2021-05-03 16:04:47,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-03 16:04:47,718 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:04:47,718 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:04:47,918 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-03 16:04:47,919 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:04:47,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:04:47,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1071796465, now seen corresponding path program 4 times [2021-05-03 16:04:47,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:04:47,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687869632] [2021-05-03 16:04:47,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:04:47,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:04:47,955 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:04:47,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687869632] [2021-05-03 16:04:47,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302938894] [2021-05-03 16:04:47,956 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:04:48,003 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:04:48,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:04:48,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 16:04:48,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:04:48,047 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 16:04:48,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:04:48,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-05-03 16:04:48,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104145794] [2021-05-03 16:04:48,048 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 16:04:48,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:04:48,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 16:04:48,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-05-03 16:04:48,049 INFO L87 Difference]: Start difference. First operand 6363 states and 25716 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:48,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:04:48,126 INFO L93 Difference]: Finished difference Result 7990 states and 31805 transitions. [2021-05-03 16:04:48,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 16:04:48,127 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-03 16:04:48,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:04:48,157 INFO L225 Difference]: With dead ends: 7990 [2021-05-03 16:04:48,158 INFO L226 Difference]: Without dead ends: 7990 [2021-05-03 16:04:48,158 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 12.2ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-05-03 16:04:48,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7990 states. [2021-05-03 16:04:48,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7990 to 6023. [2021-05-03 16:04:48,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6023 states, 6022 states have (on average 3.988542012620392) internal successors, (24019), 6022 states have internal predecessors, (24019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:48,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6023 states to 6023 states and 24019 transitions. [2021-05-03 16:04:48,496 INFO L78 Accepts]: Start accepts. Automaton has 6023 states and 24019 transitions. Word has length 32 [2021-05-03 16:04:48,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:04:48,496 INFO L480 AbstractCegarLoop]: Abstraction has 6023 states and 24019 transitions. [2021-05-03 16:04:48,496 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:48,496 INFO L276 IsEmpty]: Start isEmpty. Operand 6023 states and 24019 transitions. [2021-05-03 16:04:48,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-03 16:04:48,523 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:04:48,523 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:04:48,737 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-03 16:04:48,737 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:04:48,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:04:48,738 INFO L82 PathProgramCache]: Analyzing trace with hash -2103834406, now seen corresponding path program 5 times [2021-05-03 16:04:48,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:04:48,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020897748] [2021-05-03 16:04:48,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:04:48,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:04:48,857 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:04:48,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020897748] [2021-05-03 16:04:48,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556292136] [2021-05-03 16:04:48,858 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:04:48,890 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 16:04:48,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:04:48,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-03 16:04:48,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:04:49,079 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-05-03 16:04:49,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 16 [2021-05-03 16:04:49,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:49,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:49,084 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:04:49,084 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:3 [2021-05-03 16:04:49,121 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:04:49,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:04:49,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-03 16:04:49,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501213527] [2021-05-03 16:04:49,122 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 16:04:49,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:04:49,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 16:04:49,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-05-03 16:04:49,123 INFO L87 Difference]: Start difference. First operand 6023 states and 24019 transitions. Second operand has 16 states, 16 states have (on average 4.1875) internal successors, (67), 15 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 16:04:49,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:04:49,689 INFO L93 Difference]: Finished difference Result 14134 states and 55947 transitions. [2021-05-03 16:04:49,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 16:04:49,690 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 15 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) Word has length 34 [2021-05-03 16:04:49,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:04:49,754 INFO L225 Difference]: With dead ends: 14134 [2021-05-03 16:04:49,754 INFO L226 Difference]: Without dead ends: 13721 [2021-05-03 16:04:49,754 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 317.7ms TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-05-03 16:04:49,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13721 states. [2021-05-03 16:04:50,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13721 to 6348. [2021-05-03 16:04:50,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6348 states, 6347 states have (on average 4.00330864975579) internal successors, (25409), 6347 states have internal predecessors, (25409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:50,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6348 states to 6348 states and 25409 transitions. [2021-05-03 16:04:50,090 INFO L78 Accepts]: Start accepts. Automaton has 6348 states and 25409 transitions. Word has length 34 [2021-05-03 16:04:50,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:04:50,090 INFO L480 AbstractCegarLoop]: Abstraction has 6348 states and 25409 transitions. [2021-05-03 16:04:50,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 15 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 16:04:50,090 INFO L276 IsEmpty]: Start isEmpty. Operand 6348 states and 25409 transitions. [2021-05-03 16:04:50,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-03 16:04:50,111 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:04:50,112 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:04:50,324 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:04:50,325 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:04:50,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:04:50,325 INFO L82 PathProgramCache]: Analyzing trace with hash 616045325, now seen corresponding path program 5 times [2021-05-03 16:04:50,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:04:50,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574407345] [2021-05-03 16:04:50,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:04:50,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:04:50,437 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:04:50,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574407345] [2021-05-03 16:04:50,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548986892] [2021-05-03 16:04:50,438 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:04:50,480 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 16:04:50,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:04:50,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-03 16:04:50,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:04:50,612 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:50,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 40 [2021-05-03 16:04:50,685 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-05-03 16:04:50,709 INFO L628 ElimStorePlain]: treesize reduction 16, result has 66.7 percent of original size [2021-05-03 16:04:50,717 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:04:50,717 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:28 [2021-05-03 16:04:50,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-05-03 16:04:50,822 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:50,824 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:50,824 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:04:50,824 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-05-03 16:04:50,841 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:04:50,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:04:50,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-05-03 16:04:50,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798999461] [2021-05-03 16:04:50,842 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 16:04:50,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:04:50,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 16:04:50,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-05-03 16:04:50,843 INFO L87 Difference]: Start difference. First operand 6348 states and 25409 transitions. Second operand has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 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 16:04:51,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:04:51,813 INFO L93 Difference]: Finished difference Result 17828 states and 69084 transitions. [2021-05-03 16:04:51,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 16:04:51,814 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 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 34 [2021-05-03 16:04:51,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:04:51,886 INFO L225 Difference]: With dead ends: 17828 [2021-05-03 16:04:51,886 INFO L226 Difference]: Without dead ends: 17753 [2021-05-03 16:04:51,887 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 547.6ms TimeCoverageRelationStatistics Valid=155, Invalid=601, Unknown=0, NotChecked=0, Total=756 [2021-05-03 16:04:51,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17753 states. [2021-05-03 16:04:52,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17753 to 7658. [2021-05-03 16:04:52,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7658 states, 7657 states have (on average 4.0185451221104875) internal successors, (30770), 7657 states have internal predecessors, (30770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:52,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7658 states to 7658 states and 30770 transitions. [2021-05-03 16:04:52,251 INFO L78 Accepts]: Start accepts. Automaton has 7658 states and 30770 transitions. Word has length 34 [2021-05-03 16:04:52,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:04:52,251 INFO L480 AbstractCegarLoop]: Abstraction has 7658 states and 30770 transitions. [2021-05-03 16:04:52,251 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 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 16:04:52,251 INFO L276 IsEmpty]: Start isEmpty. Operand 7658 states and 30770 transitions. [2021-05-03 16:04:52,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-03 16:04:52,273 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:04:52,274 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:04:52,495 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:04:52,495 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:04:52,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:04:52,496 INFO L82 PathProgramCache]: Analyzing trace with hash -158773189, now seen corresponding path program 6 times [2021-05-03 16:04:52,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:04:52,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288648318] [2021-05-03 16:04:52,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:04:52,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:04:52,586 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:04:52,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288648318] [2021-05-03 16:04:52,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103149634] [2021-05-03 16:04:52,587 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:04:52,618 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 16:04:52,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:04:52,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 16:04:52,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:04:52,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:52,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:04:52,748 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:52,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 38 [2021-05-03 16:04:52,762 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 16:04:52,775 INFO L628 ElimStorePlain]: treesize reduction 7, result has 77.4 percent of original size [2021-05-03 16:04:52,776 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:04:52,776 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:24 [2021-05-03 16:04:52,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 16:04:52,841 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:52,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:52,843 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:04:52,843 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:5 [2021-05-03 16:04:52,864 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:04:52,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:04:52,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-05-03 16:04:52,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060387906] [2021-05-03 16:04:52,864 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 16:04:52,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:04:52,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 16:04:52,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-05-03 16:04:52,865 INFO L87 Difference]: Start difference. First operand 7658 states and 30770 transitions. Second operand has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 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 16:04:53,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:04:53,939 INFO L93 Difference]: Finished difference Result 26431 states and 104477 transitions. [2021-05-03 16:04:53,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 16:04:53,940 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 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 34 [2021-05-03 16:04:53,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:04:54,069 INFO L225 Difference]: With dead ends: 26431 [2021-05-03 16:04:54,069 INFO L226 Difference]: Without dead ends: 26356 [2021-05-03 16:04:54,070 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 515.8ms TimeCoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2021-05-03 16:04:54,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26356 states. [2021-05-03 16:04:54,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26356 to 8714. [2021-05-03 16:04:54,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8714 states, 8713 states have (on average 4.058188913118329) internal successors, (35359), 8713 states have internal predecessors, (35359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:54,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8714 states to 8714 states and 35359 transitions. [2021-05-03 16:04:54,708 INFO L78 Accepts]: Start accepts. Automaton has 8714 states and 35359 transitions. Word has length 34 [2021-05-03 16:04:54,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:04:54,709 INFO L480 AbstractCegarLoop]: Abstraction has 8714 states and 35359 transitions. [2021-05-03 16:04:54,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 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 16:04:54,709 INFO L276 IsEmpty]: Start isEmpty. Operand 8714 states and 35359 transitions. [2021-05-03 16:04:54,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-03 16:04:54,736 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:04:54,736 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:04:54,943 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-03 16:04:54,944 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:04:54,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:04:54,944 INFO L82 PathProgramCache]: Analyzing trace with hash -824736107, now seen corresponding path program 7 times [2021-05-03 16:04:54,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:04:54,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282974239] [2021-05-03 16:04:54,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:04:54,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:04:55,037 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:04:55,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282974239] [2021-05-03 16:04:55,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529472827] [2021-05-03 16:04:55,037 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:04:55,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:04:55,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 16:04:55,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:04:55,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2021-05-03 16:04:55,315 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:55,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:55,322 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:04:55,322 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:27 [2021-05-03 16:04:55,352 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:04:55,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-05-03 16:04:55,354 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:55,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:55,356 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:04:55,356 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-05-03 16:04:55,375 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:04:55,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:04:55,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-05-03 16:04:55,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232478232] [2021-05-03 16:04:55,376 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 16:04:55,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:04:55,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 16:04:55,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-03 16:04:55,377 INFO L87 Difference]: Start difference. First operand 8714 states and 35359 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:55,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:04:55,932 INFO L93 Difference]: Finished difference Result 19981 states and 79468 transitions. [2021-05-03 16:04:55,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 16:04:55,932 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-03 16:04:55,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:04:56,017 INFO L225 Difference]: With dead ends: 19981 [2021-05-03 16:04:56,017 INFO L226 Difference]: Without dead ends: 19826 [2021-05-03 16:04:56,018 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 280.6ms TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-05-03 16:04:56,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19826 states. [2021-05-03 16:04:56,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19826 to 8750. [2021-05-03 16:04:56,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8750 states, 8749 states have (on average 4.062750028574694) internal successors, (35545), 8749 states have internal predecessors, (35545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:56,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8750 states to 8750 states and 35545 transitions. [2021-05-03 16:04:56,443 INFO L78 Accepts]: Start accepts. Automaton has 8750 states and 35545 transitions. Word has length 34 [2021-05-03 16:04:56,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:04:56,444 INFO L480 AbstractCegarLoop]: Abstraction has 8750 states and 35545 transitions. [2021-05-03 16:04:56,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:56,444 INFO L276 IsEmpty]: Start isEmpty. Operand 8750 states and 35545 transitions. [2021-05-03 16:04:56,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-03 16:04:56,472 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:04:56,472 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:04:56,672 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-03 16:04:56,673 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:04:56,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:04:56,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1500154431, now seen corresponding path program 8 times [2021-05-03 16:04:56,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:04:56,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851507822] [2021-05-03 16:04:56,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:04:56,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:04:56,773 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:04:56,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851507822] [2021-05-03 16:04:56,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889106814] [2021-05-03 16:04:56,773 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:04:56,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:04:56,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:04:56,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 16:04:56,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:04:56,973 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:04:56,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 26 [2021-05-03 16:04:56,976 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:56,984 INFO L628 ElimStorePlain]: treesize reduction 7, result has 65.0 percent of original size [2021-05-03 16:04:56,985 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:04:56,985 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:13 [2021-05-03 16:04:57,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 16:04:57,016 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:57,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:57,017 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:04:57,018 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:5 [2021-05-03 16:04:57,035 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:04:57,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:04:57,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-05-03 16:04:57,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850018208] [2021-05-03 16:04:57,037 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 16:04:57,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:04:57,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 16:04:57,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-05-03 16:04:57,037 INFO L87 Difference]: Start difference. First operand 8750 states and 35545 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) 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 16:04:57,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:04:57,929 INFO L93 Difference]: Finished difference Result 24924 states and 99773 transitions. [2021-05-03 16:04:57,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 16:04:57,930 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) 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 34 [2021-05-03 16:04:57,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:04:58,037 INFO L225 Difference]: With dead ends: 24924 [2021-05-03 16:04:58,037 INFO L226 Difference]: Without dead ends: 24849 [2021-05-03 16:04:58,037 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 342.5ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-05-03 16:04:58,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24849 states. [2021-05-03 16:04:58,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24849 to 10107. [2021-05-03 16:04:58,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10107 states, 10106 states have (on average 4.0783692855729266) internal successors, (41216), 10106 states have internal predecessors, (41216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:58,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10107 states to 10107 states and 41216 transitions. [2021-05-03 16:04:58,413 INFO L78 Accepts]: Start accepts. Automaton has 10107 states and 41216 transitions. Word has length 34 [2021-05-03 16:04:58,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:04:58,413 INFO L480 AbstractCegarLoop]: Abstraction has 10107 states and 41216 transitions. [2021-05-03 16:04:58,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8666666666666667) 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 16:04:58,414 INFO L276 IsEmpty]: Start isEmpty. Operand 10107 states and 41216 transitions. [2021-05-03 16:04:58,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-03 16:04:58,436 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:04:58,436 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:04:58,636 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-03 16:04:58,637 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:04:58,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:04:58,637 INFO L82 PathProgramCache]: Analyzing trace with hash 834191513, now seen corresponding path program 9 times [2021-05-03 16:04:58,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:04:58,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375476476] [2021-05-03 16:04:58,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:04:58,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:04:58,736 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:04:58,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375476476] [2021-05-03 16:04:58,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870055969] [2021-05-03 16:04:58,736 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:04:58,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 16:04:58,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:04:58,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 16:04:58,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:04:58,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2021-05-03 16:04:58,973 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:58,978 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:58,979 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:04:58,979 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:27 [2021-05-03 16:04:59,009 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-05-03 16:04:59,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-05-03 16:04:59,011 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:04:59,012 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:04:59,013 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:04:59,013 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:3 [2021-05-03 16:04:59,030 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:04:59,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:04:59,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-05-03 16:04:59,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598842779] [2021-05-03 16:04:59,031 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 16:04:59,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:04:59,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 16:04:59,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-05-03 16:04:59,032 INFO L87 Difference]: Start difference. First operand 10107 states and 41216 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:04:59,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:04:59,774 INFO L93 Difference]: Finished difference Result 23710 states and 94971 transitions. [2021-05-03 16:04:59,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 16:04:59,775 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-03 16:04:59,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:04:59,884 INFO L225 Difference]: With dead ends: 23710 [2021-05-03 16:04:59,884 INFO L226 Difference]: Without dead ends: 23595 [2021-05-03 16:04:59,884 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 277.3ms TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-05-03 16:04:59,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23595 states. [2021-05-03 16:05:00,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23595 to 9723. [2021-05-03 16:05:00,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9723 states, 9722 states have (on average 4.074675992594116) internal successors, (39614), 9722 states have internal predecessors, (39614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:00,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9723 states to 9723 states and 39614 transitions. [2021-05-03 16:05:00,389 INFO L78 Accepts]: Start accepts. Automaton has 9723 states and 39614 transitions. Word has length 34 [2021-05-03 16:05:00,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:05:00,390 INFO L480 AbstractCegarLoop]: Abstraction has 9723 states and 39614 transitions. [2021-05-03 16:05:00,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:00,390 INFO L276 IsEmpty]: Start isEmpty. Operand 9723 states and 39614 transitions. [2021-05-03 16:05:00,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-03 16:05:00,420 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:05:00,420 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:05:00,632 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:05:00,633 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:05:00,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:05:00,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1500178855, now seen corresponding path program 10 times [2021-05-03 16:05:00,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:05:00,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223107012] [2021-05-03 16:05:00,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:05:00,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:05:00,720 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:00,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223107012] [2021-05-03 16:05:00,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90218520] [2021-05-03 16:05:00,721 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:05:00,748 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:05:00,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:05:00,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 16:05:00,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:05:00,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-05-03 16:05:00,874 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:00,879 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:00,880 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:00,880 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:29 [2021-05-03 16:05:00,944 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:05:00,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-05-03 16:05:00,946 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:00,948 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:00,948 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:00,948 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-05-03 16:05:00,968 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:00,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:05:00,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-05-03 16:05:00,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424793098] [2021-05-03 16:05:00,968 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 16:05:00,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:05:00,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 16:05:00,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-05-03 16:05:00,969 INFO L87 Difference]: Start difference. First operand 9723 states and 39614 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:01,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:05:01,689 INFO L93 Difference]: Finished difference Result 22988 states and 91824 transitions. [2021-05-03 16:05:01,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 16:05:01,690 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-03 16:05:01,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:05:01,794 INFO L225 Difference]: With dead ends: 22988 [2021-05-03 16:05:01,794 INFO L226 Difference]: Without dead ends: 22753 [2021-05-03 16:05:01,795 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 284.8ms TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-05-03 16:05:01,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22753 states. [2021-05-03 16:05:02,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22753 to 9831. [2021-05-03 16:05:02,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9831 states, 9830 states have (on average 4.077110885045778) internal successors, (40078), 9830 states have internal predecessors, (40078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:02,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9831 states to 9831 states and 40078 transitions. [2021-05-03 16:05:02,258 INFO L78 Accepts]: Start accepts. Automaton has 9831 states and 40078 transitions. Word has length 34 [2021-05-03 16:05:02,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:05:02,258 INFO L480 AbstractCegarLoop]: Abstraction has 9831 states and 40078 transitions. [2021-05-03 16:05:02,258 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:02,259 INFO L276 IsEmpty]: Start isEmpty. Operand 9831 states and 40078 transitions. [2021-05-03 16:05:02,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-03 16:05:02,294 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:05:02,295 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:05:02,497 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:05:02,497 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:05:02,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:05:02,497 INFO L82 PathProgramCache]: Analyzing trace with hash -573433369, now seen corresponding path program 11 times [2021-05-03 16:05:02,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:05:02,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202035704] [2021-05-03 16:05:02,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:05:02,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:05:02,602 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:02,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202035704] [2021-05-03 16:05:02,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299696503] [2021-05-03 16:05:02,602 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:05:02,635 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 16:05:02,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:05:02,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-03 16:05:02,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:05:02,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:05:02,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:05:02,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:05:02,906 INFO L244 Elim1Store]: Index analysis took 133 ms [2021-05-03 16:05:02,916 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:02,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 58 [2021-05-03 16:05:02,957 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-05-03 16:05:02,978 INFO L628 ElimStorePlain]: treesize reduction 22, result has 56.9 percent of original size [2021-05-03 16:05:02,985 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:05:02,985 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:28 [2021-05-03 16:05:03,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 16:05:03,043 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:03,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:03,045 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:03,045 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:5 [2021-05-03 16:05:03,062 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:03,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:05:03,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-05-03 16:05:03,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804279119] [2021-05-03 16:05:03,063 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 16:05:03,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:05:03,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 16:05:03,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-05-03 16:05:03,064 INFO L87 Difference]: Start difference. First operand 9831 states and 40078 transitions. Second operand has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 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 16:05:04,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:05:04,500 INFO L93 Difference]: Finished difference Result 26430 states and 105005 transitions. [2021-05-03 16:05:04,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 16:05:04,500 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 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 34 [2021-05-03 16:05:04,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:05:04,631 INFO L225 Difference]: With dead ends: 26430 [2021-05-03 16:05:04,631 INFO L226 Difference]: Without dead ends: 26355 [2021-05-03 16:05:04,632 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 886.5ms TimeCoverageRelationStatistics Valid=192, Invalid=1140, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 16:05:04,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26355 states. [2021-05-03 16:05:05,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26355 to 10895. [2021-05-03 16:05:05,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10895 states, 10894 states have (on average 4.096016155682027) internal successors, (44622), 10894 states have internal predecessors, (44622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:05,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10895 states to 10895 states and 44622 transitions. [2021-05-03 16:05:05,099 INFO L78 Accepts]: Start accepts. Automaton has 10895 states and 44622 transitions. Word has length 34 [2021-05-03 16:05:05,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:05:05,099 INFO L480 AbstractCegarLoop]: Abstraction has 10895 states and 44622 transitions. [2021-05-03 16:05:05,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 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 16:05:05,099 INFO L276 IsEmpty]: Start isEmpty. Operand 10895 states and 44622 transitions. [2021-05-03 16:05:05,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-03 16:05:05,134 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:05:05,134 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:05:05,338 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:05:05,339 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:05:05,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:05:05,340 INFO L82 PathProgramCache]: Analyzing trace with hash -316777907, now seen corresponding path program 12 times [2021-05-03 16:05:05,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:05:05,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332429616] [2021-05-03 16:05:05,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:05:05,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:05:05,459 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:05,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332429616] [2021-05-03 16:05:05,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39633385] [2021-05-03 16:05:05,460 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:05:05,494 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 16:05:05,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:05:05,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-03 16:05:05,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:05:05,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-05-03 16:05:05,839 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:05,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:05,852 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-05-03 16:05:05,852 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:51, output treesize:36 [2021-05-03 16:05:05,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:05:05,920 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:05,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 33 [2021-05-03 16:05:05,946 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 16:05:05,956 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:05,975 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:05:05,975 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:47, output treesize:13 [2021-05-03 16:05:06,010 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:06,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:05:06,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-05-03 16:05:06,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578408398] [2021-05-03 16:05:06,011 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 16:05:06,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:05:06,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 16:05:06,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-05-03 16:05:06,012 INFO L87 Difference]: Start difference. First operand 10895 states and 44622 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:06,825 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2021-05-03 16:05:07,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:05:07,492 INFO L93 Difference]: Finished difference Result 28412 states and 113321 transitions. [2021-05-03 16:05:07,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 16:05:07,492 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-03 16:05:07,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:05:07,631 INFO L225 Difference]: With dead ends: 28412 [2021-05-03 16:05:07,631 INFO L226 Difference]: Without dead ends: 28297 [2021-05-03 16:05:07,632 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 824.2ms TimeCoverageRelationStatistics Valid=169, Invalid=701, Unknown=0, NotChecked=0, Total=870 [2021-05-03 16:05:07,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28297 states. [2021-05-03 16:05:08,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28297 to 10659. [2021-05-03 16:05:08,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10659 states, 10658 states have (on average 4.094952148620754) internal successors, (43644), 10658 states have internal predecessors, (43644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:08,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10659 states to 10659 states and 43644 transitions. [2021-05-03 16:05:08,160 INFO L78 Accepts]: Start accepts. Automaton has 10659 states and 43644 transitions. Word has length 34 [2021-05-03 16:05:08,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:05:08,161 INFO L480 AbstractCegarLoop]: Abstraction has 10659 states and 43644 transitions. [2021-05-03 16:05:08,161 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:08,161 INFO L276 IsEmpty]: Start isEmpty. Operand 10659 states and 43644 transitions. [2021-05-03 16:05:08,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-03 16:05:08,192 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:05:08,192 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:05:08,400 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-05-03 16:05:08,401 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:05:08,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:05:08,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1202868029, now seen corresponding path program 13 times [2021-05-03 16:05:08,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:05:08,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722397798] [2021-05-03 16:05:08,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:05:08,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:05:08,541 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:08,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722397798] [2021-05-03 16:05:08,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467466427] [2021-05-03 16:05:08,542 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:05:08,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:05:08,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 16:05:08,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:05:08,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 16:05:08,690 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:08,697 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:08,698 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:08,698 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:23 [2021-05-03 16:05:08,745 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:05:08,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-05-03 16:05:08,749 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:08,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:08,751 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:08,751 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-05-03 16:05:08,776 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:08,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:05:08,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-05-03 16:05:08,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390653895] [2021-05-03 16:05:08,778 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 16:05:08,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:05:08,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 16:05:08,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-05-03 16:05:08,780 INFO L87 Difference]: Start difference. First operand 10659 states and 43644 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:09,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:05:09,249 INFO L93 Difference]: Finished difference Result 19194 states and 76806 transitions. [2021-05-03 16:05:09,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 16:05:09,250 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-03 16:05:09,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:05:09,340 INFO L225 Difference]: With dead ends: 19194 [2021-05-03 16:05:09,341 INFO L226 Difference]: Without dead ends: 19079 [2021-05-03 16:05:09,341 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 291.7ms TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-05-03 16:05:09,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19079 states. [2021-05-03 16:05:09,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19079 to 10744. [2021-05-03 16:05:09,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10744 states, 10743 states have (on average 4.095783300753979) internal successors, (44001), 10743 states have internal predecessors, (44001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:09,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10744 states to 10744 states and 44001 transitions. [2021-05-03 16:05:09,798 INFO L78 Accepts]: Start accepts. Automaton has 10744 states and 44001 transitions. Word has length 34 [2021-05-03 16:05:09,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:05:09,799 INFO L480 AbstractCegarLoop]: Abstraction has 10744 states and 44001 transitions. [2021-05-03 16:05:09,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:09,799 INFO L276 IsEmpty]: Start isEmpty. Operand 10744 states and 44001 transitions. [2021-05-03 16:05:09,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-03 16:05:09,832 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:05:09,833 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:05:10,037 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-05-03 16:05:10,037 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:05:10,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:05:10,037 INFO L82 PathProgramCache]: Analyzing trace with hash 431927787, now seen corresponding path program 14 times [2021-05-03 16:05:10,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:05:10,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523715135] [2021-05-03 16:05:10,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:05:10,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:05:10,136 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:10,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523715135] [2021-05-03 16:05:10,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991285702] [2021-05-03 16:05:10,136 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:05:10,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:05:10,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:05:10,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 16:05:10,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:05:10,316 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:05:10,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 26 [2021-05-03 16:05:10,318 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:10,326 INFO L628 ElimStorePlain]: treesize reduction 7, result has 65.0 percent of original size [2021-05-03 16:05:10,327 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:10,327 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:13 [2021-05-03 16:05:10,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 16:05:10,364 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:10,365 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:10,366 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:10,366 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:5 [2021-05-03 16:05:10,383 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:10,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:05:10,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-05-03 16:05:10,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605259263] [2021-05-03 16:05:10,383 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 16:05:10,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:05:10,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 16:05:10,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-05-03 16:05:10,384 INFO L87 Difference]: Start difference. First operand 10744 states and 44001 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) 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 16:05:11,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:05:11,488 INFO L93 Difference]: Finished difference Result 24998 states and 100164 transitions. [2021-05-03 16:05:11,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 16:05:11,489 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) 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 34 [2021-05-03 16:05:11,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:05:11,604 INFO L225 Difference]: With dead ends: 24998 [2021-05-03 16:05:11,604 INFO L226 Difference]: Without dead ends: 24923 [2021-05-03 16:05:11,605 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 617.8ms TimeCoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2021-05-03 16:05:11,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24923 states. [2021-05-03 16:05:12,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24923 to 11500. [2021-05-03 16:05:12,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11500 states, 11499 states have (on average 4.106009218192886) internal successors, (47215), 11499 states have internal predecessors, (47215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:12,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11500 states to 11500 states and 47215 transitions. [2021-05-03 16:05:12,083 INFO L78 Accepts]: Start accepts. Automaton has 11500 states and 47215 transitions. Word has length 34 [2021-05-03 16:05:12,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:05:12,083 INFO L480 AbstractCegarLoop]: Abstraction has 11500 states and 47215 transitions. [2021-05-03 16:05:12,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8666666666666667) 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 16:05:12,083 INFO L276 IsEmpty]: Start isEmpty. Operand 11500 states and 47215 transitions. [2021-05-03 16:05:12,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-03 16:05:12,117 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:05:12,118 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:05:12,318 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:05:12,319 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:05:12,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:05:12,319 INFO L82 PathProgramCache]: Analyzing trace with hash 688583249, now seen corresponding path program 15 times [2021-05-03 16:05:12,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:05:12,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252790638] [2021-05-03 16:05:12,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:05:12,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:05:12,433 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:12,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252790638] [2021-05-03 16:05:12,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658299048] [2021-05-03 16:05:12,434 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:05:12,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 16:05:12,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:05:12,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-03 16:05:12,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:05:12,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2021-05-03 16:05:12,620 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:12,626 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:12,627 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:12,627 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:31 [2021-05-03 16:05:12,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:05:12,676 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:12,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 37 [2021-05-03 16:05:12,696 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 16:05:12,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:12,710 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:05:12,710 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:24 [2021-05-03 16:05:12,748 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:12,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:05:12,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-05-03 16:05:12,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774443841] [2021-05-03 16:05:12,749 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 16:05:12,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:05:12,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 16:05:12,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-05-03 16:05:12,749 INFO L87 Difference]: Start difference. First operand 11500 states and 47215 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:14,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:05:14,133 INFO L93 Difference]: Finished difference Result 23541 states and 94127 transitions. [2021-05-03 16:05:14,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 16:05:14,133 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-03 16:05:14,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:05:14,247 INFO L225 Difference]: With dead ends: 23541 [2021-05-03 16:05:14,247 INFO L226 Difference]: Without dead ends: 23426 [2021-05-03 16:05:14,248 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 793.8ms TimeCoverageRelationStatistics Valid=213, Invalid=977, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 16:05:14,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23426 states. [2021-05-03 16:05:14,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23426 to 11260. [2021-05-03 16:05:14,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11260 states, 11259 states have (on average 4.104893862687628) internal successors, (46217), 11259 states have internal predecessors, (46217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:14,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11260 states to 11260 states and 46217 transitions. [2021-05-03 16:05:14,750 INFO L78 Accepts]: Start accepts. Automaton has 11260 states and 46217 transitions. Word has length 34 [2021-05-03 16:05:14,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:05:14,750 INFO L480 AbstractCegarLoop]: Abstraction has 11260 states and 46217 transitions. [2021-05-03 16:05:14,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:14,750 INFO L276 IsEmpty]: Start isEmpty. Operand 11260 states and 46217 transitions. [2021-05-03 16:05:14,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-03 16:05:14,787 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:05:14,787 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:05:14,988 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-05-03 16:05:14,988 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:05:14,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:05:14,989 INFO L82 PathProgramCache]: Analyzing trace with hash -2086738111, now seen corresponding path program 16 times [2021-05-03 16:05:14,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:05:14,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544181708] [2021-05-03 16:05:14,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:05:15,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:05:15,157 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:15,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544181708] [2021-05-03 16:05:15,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742784141] [2021-05-03 16:05:15,158 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:05:15,185 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:05:15,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:05:15,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 16:05:15,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:05:15,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 16:05:15,303 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:15,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:15,310 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:15,311 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:23 [2021-05-03 16:05:15,362 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:05:15,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-05-03 16:05:15,364 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:15,366 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:15,367 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:15,367 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-05-03 16:05:15,434 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:15,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:05:15,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-05-03 16:05:15,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435972898] [2021-05-03 16:05:15,435 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 16:05:15,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:05:15,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 16:05:15,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-05-03 16:05:15,436 INFO L87 Difference]: Start difference. First operand 11260 states and 46217 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:16,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:05:16,139 INFO L93 Difference]: Finished difference Result 22298 states and 89003 transitions. [2021-05-03 16:05:16,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 16:05:16,140 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-03 16:05:16,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:05:16,244 INFO L225 Difference]: With dead ends: 22298 [2021-05-03 16:05:16,245 INFO L226 Difference]: Without dead ends: 22143 [2021-05-03 16:05:16,245 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 440.8ms TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-05-03 16:05:16,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22143 states. [2021-05-03 16:05:16,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22143 to 12043. [2021-05-03 16:05:16,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12043 states, 12042 states have (on average 4.112855007473842) internal successors, (49527), 12042 states have internal predecessors, (49527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:16,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12043 states to 12043 states and 49527 transitions. [2021-05-03 16:05:16,708 INFO L78 Accepts]: Start accepts. Automaton has 12043 states and 49527 transitions. Word has length 34 [2021-05-03 16:05:16,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:05:16,709 INFO L480 AbstractCegarLoop]: Abstraction has 12043 states and 49527 transitions. [2021-05-03 16:05:16,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:16,709 INFO L276 IsEmpty]: Start isEmpty. Operand 12043 states and 49527 transitions. [2021-05-03 16:05:16,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-03 16:05:16,744 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:05:16,744 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:05:16,948 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:05:16,949 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:05:16,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:05:16,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1516120409, now seen corresponding path program 17 times [2021-05-03 16:05:16,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:05:16,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166770483] [2021-05-03 16:05:16,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:05:16,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:05:17,042 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:17,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166770483] [2021-05-03 16:05:17,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109400300] [2021-05-03 16:05:17,043 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:05:17,074 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 16:05:17,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:05:17,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 16:05:17,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:05:17,255 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-05-03 16:05:17,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 37 [2021-05-03 16:05:17,275 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 16:05:17,288 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:17,295 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:05:17,296 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:45, output treesize:30 [2021-05-03 16:05:17,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-05-03 16:05:17,389 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:17,391 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:17,391 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:17,392 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:3 [2021-05-03 16:05:17,410 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:17,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:05:17,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-05-03 16:05:17,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870107902] [2021-05-03 16:05:17,411 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 16:05:17,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:05:17,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 16:05:17,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-05-03 16:05:17,412 INFO L87 Difference]: Start difference. First operand 12043 states and 49527 transitions. Second operand has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 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 16:05:18,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:05:18,848 INFO L93 Difference]: Finished difference Result 36456 states and 147208 transitions. [2021-05-03 16:05:18,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 16:05:18,848 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 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 34 [2021-05-03 16:05:18,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:05:19,037 INFO L225 Difference]: With dead ends: 36456 [2021-05-03 16:05:19,037 INFO L226 Difference]: Without dead ends: 36381 [2021-05-03 16:05:19,038 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 639.1ms TimeCoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 16:05:19,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36381 states. [2021-05-03 16:05:19,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36381 to 13600. [2021-05-03 16:05:19,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13600 states, 13599 states have (on average 4.1242003088462384) internal successors, (56085), 13599 states have internal predecessors, (56085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:19,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13600 states to 13600 states and 56085 transitions. [2021-05-03 16:05:19,713 INFO L78 Accepts]: Start accepts. Automaton has 13600 states and 56085 transitions. Word has length 34 [2021-05-03 16:05:19,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:05:19,714 INFO L480 AbstractCegarLoop]: Abstraction has 13600 states and 56085 transitions. [2021-05-03 16:05:19,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 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 16:05:19,714 INFO L276 IsEmpty]: Start isEmpty. Operand 13600 states and 56085 transitions. [2021-05-03 16:05:19,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-03 16:05:19,759 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:05:19,759 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:05:19,972 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:05:19,973 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:05:19,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:05:19,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1259464947, now seen corresponding path program 18 times [2021-05-03 16:05:19,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:05:19,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494692432] [2021-05-03 16:05:19,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:05:19,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:05:20,061 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:20,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494692432] [2021-05-03 16:05:20,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106951447] [2021-05-03 16:05:20,062 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:05:20,089 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 16:05:20,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:05:20,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-03 16:05:20,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:05:20,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2021-05-03 16:05:20,267 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:20,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:20,275 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:20,276 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:31 [2021-05-03 16:05:20,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:05:20,324 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:20,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 37 [2021-05-03 16:05:20,358 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 16:05:20,369 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:20,373 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:05:20,373 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:24 [2021-05-03 16:05:20,415 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:20,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:05:20,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-05-03 16:05:20,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143149991] [2021-05-03 16:05:20,416 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 16:05:20,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:05:20,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 16:05:20,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-05-03 16:05:20,417 INFO L87 Difference]: Start difference. First operand 13600 states and 56085 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:21,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:05:21,642 INFO L93 Difference]: Finished difference Result 26172 states and 105952 transitions. [2021-05-03 16:05:21,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 16:05:21,642 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-03 16:05:21,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:05:21,786 INFO L225 Difference]: With dead ends: 26172 [2021-05-03 16:05:21,787 INFO L226 Difference]: Without dead ends: 26057 [2021-05-03 16:05:21,787 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 689.7ms TimeCoverageRelationStatistics Valid=202, Invalid=920, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 16:05:21,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26057 states. [2021-05-03 16:05:22,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26057 to 13750. [2021-05-03 16:05:22,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13750 states, 13749 states have (on average 4.126918321332461) internal successors, (56741), 13749 states have internal predecessors, (56741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:22,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13750 states to 13750 states and 56741 transitions. [2021-05-03 16:05:22,424 INFO L78 Accepts]: Start accepts. Automaton has 13750 states and 56741 transitions. Word has length 34 [2021-05-03 16:05:22,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:05:22,424 INFO L480 AbstractCegarLoop]: Abstraction has 13750 states and 56741 transitions. [2021-05-03 16:05:22,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:22,424 INFO L276 IsEmpty]: Start isEmpty. Operand 13750 states and 56741 transitions. [2021-05-03 16:05:22,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-03 16:05:22,466 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:05:22,466 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:05:22,667 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-05-03 16:05:22,667 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:05:22,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:05:22,669 INFO L82 PathProgramCache]: Analyzing trace with hash -756448751, now seen corresponding path program 19 times [2021-05-03 16:05:22,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:05:22,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110076329] [2021-05-03 16:05:22,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:05:22,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:05:22,742 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:22,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110076329] [2021-05-03 16:05:22,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625219976] [2021-05-03 16:05:22,743 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:05:22,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:05:22,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 16:05:22,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:05:22,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-05-03 16:05:22,895 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:22,901 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:22,902 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:22,902 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:29 [2021-05-03 16:05:22,966 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:05:22,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-05-03 16:05:22,968 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:22,969 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:22,970 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:22,970 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-05-03 16:05:22,988 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:22,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:05:22,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-05-03 16:05:22,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728728977] [2021-05-03 16:05:22,989 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 16:05:22,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:05:22,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 16:05:22,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-05-03 16:05:22,993 INFO L87 Difference]: Start difference. First operand 13750 states and 56741 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:23,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:05:23,679 INFO L93 Difference]: Finished difference Result 28454 states and 114913 transitions. [2021-05-03 16:05:23,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 16:05:23,679 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-03 16:05:23,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:05:23,815 INFO L225 Difference]: With dead ends: 28454 [2021-05-03 16:05:23,816 INFO L226 Difference]: Without dead ends: 28219 [2021-05-03 16:05:23,816 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 332.3ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-05-03 16:05:23,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28219 states. [2021-05-03 16:05:24,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28219 to 12943. [2021-05-03 16:05:24,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12943 states, 12942 states have (on average 4.129346314325452) internal successors, (53442), 12942 states have internal predecessors, (53442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:24,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12943 states to 12943 states and 53442 transitions. [2021-05-03 16:05:24,491 INFO L78 Accepts]: Start accepts. Automaton has 12943 states and 53442 transitions. Word has length 34 [2021-05-03 16:05:24,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:05:24,492 INFO L480 AbstractCegarLoop]: Abstraction has 12943 states and 53442 transitions. [2021-05-03 16:05:24,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:24,492 INFO L276 IsEmpty]: Start isEmpty. Operand 12943 states and 53442 transitions. [2021-05-03 16:05:24,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-03 16:05:24,535 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:05:24,535 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:05:24,746 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:05:24,747 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:05:24,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:05:24,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1335361853, now seen corresponding path program 20 times [2021-05-03 16:05:24,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:05:24,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240477172] [2021-05-03 16:05:24,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:05:24,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:05:24,831 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:24,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240477172] [2021-05-03 16:05:24,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527992739] [2021-05-03 16:05:24,831 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:05:24,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:05:24,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:05:24,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 16:05:24,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:05:24,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 16:05:24,935 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:24,940 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:24,941 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:24,941 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-05-03 16:05:24,994 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:05:24,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-05-03 16:05:24,995 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:24,996 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:24,997 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:24,997 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-05-03 16:05:25,016 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:25,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:05:25,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-05-03 16:05:25,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666254294] [2021-05-03 16:05:25,017 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 16:05:25,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:05:25,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 16:05:25,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-05-03 16:05:25,018 INFO L87 Difference]: Start difference. First operand 12943 states and 53442 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:25,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:05:25,815 INFO L93 Difference]: Finished difference Result 23438 states and 94591 transitions. [2021-05-03 16:05:25,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 16:05:25,816 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-03 16:05:25,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:05:25,920 INFO L225 Difference]: With dead ends: 23438 [2021-05-03 16:05:25,921 INFO L226 Difference]: Without dead ends: 23283 [2021-05-03 16:05:25,921 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 390.7ms TimeCoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2021-05-03 16:05:25,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23283 states. [2021-05-03 16:05:26,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23283 to 13180. [2021-05-03 16:05:26,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13180 states, 13179 states have (on average 4.129524243114045) internal successors, (54423), 13179 states have internal predecessors, (54423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:26,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13180 states to 13180 states and 54423 transitions. [2021-05-03 16:05:26,525 INFO L78 Accepts]: Start accepts. Automaton has 13180 states and 54423 transitions. Word has length 34 [2021-05-03 16:05:26,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:05:26,527 INFO L480 AbstractCegarLoop]: Abstraction has 13180 states and 54423 transitions. [2021-05-03 16:05:26,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:26,528 INFO L276 IsEmpty]: Start isEmpty. Operand 13180 states and 54423 transitions. [2021-05-03 16:05:26,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-03 16:05:26,571 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:05:26,572 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:05:26,792 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-05-03 16:05:26,793 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:05:26,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:05:26,793 INFO L82 PathProgramCache]: Analyzing trace with hash 53048833, now seen corresponding path program 21 times [2021-05-03 16:05:26,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:05:26,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691139379] [2021-05-03 16:05:26,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:05:26,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:05:26,926 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:26,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691139379] [2021-05-03 16:05:26,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998776515] [2021-05-03 16:05:26,927 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 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 16:05:26,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 16:05:26,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:05:26,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 16:05:26,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:05:27,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 16:05:27,067 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:27,072 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:27,073 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:27,073 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:21 [2021-05-03 16:05:27,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:05:27,165 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:27,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 37 [2021-05-03 16:05:27,188 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 16:05:27,196 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:27,200 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:05:27,200 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:24 [2021-05-03 16:05:27,241 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:27,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:05:27,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-05-03 16:05:27,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130000152] [2021-05-03 16:05:27,242 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 16:05:27,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:05:27,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 16:05:27,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-05-03 16:05:27,242 INFO L87 Difference]: Start difference. First operand 13180 states and 54423 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:28,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:05:28,329 INFO L93 Difference]: Finished difference Result 27881 states and 112706 transitions. [2021-05-03 16:05:28,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 16:05:28,330 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-03 16:05:28,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:05:28,468 INFO L225 Difference]: With dead ends: 27881 [2021-05-03 16:05:28,469 INFO L226 Difference]: Without dead ends: 27646 [2021-05-03 16:05:28,469 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 546.0ms TimeCoverageRelationStatistics Valid=181, Invalid=875, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 16:05:28,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27646 states. [2021-05-03 16:05:29,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27646 to 13288. [2021-05-03 16:05:29,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13288 states, 13287 states have (on average 4.130879807330474) internal successors, (54887), 13287 states have internal predecessors, (54887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:29,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13288 states to 13288 states and 54887 transitions. [2021-05-03 16:05:29,120 INFO L78 Accepts]: Start accepts. Automaton has 13288 states and 54887 transitions. Word has length 34 [2021-05-03 16:05:29,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:05:29,120 INFO L480 AbstractCegarLoop]: Abstraction has 13288 states and 54887 transitions. [2021-05-03 16:05:29,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:29,120 INFO L276 IsEmpty]: Start isEmpty. Operand 13288 states and 54887 transitions. [2021-05-03 16:05:29,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-03 16:05:29,165 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:05:29,165 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:05:29,366 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-05-03 16:05:29,366 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:05:29,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:05:29,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1169034441, now seen corresponding path program 22 times [2021-05-03 16:05:29,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:05:29,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445660006] [2021-05-03 16:05:29,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:05:29,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:05:29,477 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:29,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445660006] [2021-05-03 16:05:29,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862895595] [2021-05-03 16:05:29,477 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 16:05:29,514 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:05:29,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:05:29,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 16:05:29,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:05:29,632 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:05:29,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 26 [2021-05-03 16:05:29,634 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:29,640 INFO L628 ElimStorePlain]: treesize reduction 7, result has 65.0 percent of original size [2021-05-03 16:05:29,641 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:29,641 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:13 [2021-05-03 16:05:29,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 16:05:29,674 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:29,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:29,676 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:29,676 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:5 [2021-05-03 16:05:29,695 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:29,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:05:29,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-05-03 16:05:29,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615524278] [2021-05-03 16:05:29,696 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 16:05:29,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:05:29,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 16:05:29,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-05-03 16:05:29,697 INFO L87 Difference]: Start difference. First operand 13288 states and 54887 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) 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 16:05:30,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:05:30,449 INFO L93 Difference]: Finished difference Result 20392 states and 83172 transitions. [2021-05-03 16:05:30,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 16:05:30,450 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) 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 34 [2021-05-03 16:05:30,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:05:30,542 INFO L225 Difference]: With dead ends: 20392 [2021-05-03 16:05:30,543 INFO L226 Difference]: Without dead ends: 20317 [2021-05-03 16:05:30,543 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 349.4ms TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-05-03 16:05:30,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20317 states. [2021-05-03 16:05:30,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20317 to 13899. [2021-05-03 16:05:30,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13899 states, 13898 states have (on average 4.1316736221039) internal successors, (57422), 13898 states have internal predecessors, (57422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:30,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13899 states to 13899 states and 57422 transitions. [2021-05-03 16:05:30,981 INFO L78 Accepts]: Start accepts. Automaton has 13899 states and 57422 transitions. Word has length 34 [2021-05-03 16:05:30,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:05:30,981 INFO L480 AbstractCegarLoop]: Abstraction has 13899 states and 57422 transitions. [2021-05-03 16:05:30,981 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8666666666666667) 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 16:05:30,981 INFO L276 IsEmpty]: Start isEmpty. Operand 13899 states and 57422 transitions. [2021-05-03 16:05:31,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-03 16:05:31,019 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:05:31,019 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:05:31,219 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-05-03 16:05:31,219 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:05:31,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:05:31,220 INFO L82 PathProgramCache]: Analyzing trace with hash -912378979, now seen corresponding path program 23 times [2021-05-03 16:05:31,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:05:31,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792049480] [2021-05-03 16:05:31,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:05:31,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:05:31,310 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:31,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792049480] [2021-05-03 16:05:31,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448026380] [2021-05-03 16:05:31,311 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:05:31,352 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 16:05:31,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:05:31,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-03 16:05:31,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:05:31,559 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-05-03 16:05:31,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-05-03 16:05:31,704 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:31,714 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:31,719 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-05-03 16:05:31,719 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:53, output treesize:38 [2021-05-03 16:05:31,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:05:31,781 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:31,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 33 [2021-05-03 16:05:31,807 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 16:05:31,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:31,838 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:05:31,838 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:49, output treesize:11 [2021-05-03 16:05:31,877 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:31,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:05:31,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-05-03 16:05:31,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292579652] [2021-05-03 16:05:31,878 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 16:05:31,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:05:31,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 16:05:31,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-05-03 16:05:31,878 INFO L87 Difference]: Start difference. First operand 13899 states and 57422 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:32,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:05:32,795 INFO L93 Difference]: Finished difference Result 29230 states and 119098 transitions. [2021-05-03 16:05:32,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 16:05:32,795 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-03 16:05:32,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:05:33,067 INFO L225 Difference]: With dead ends: 29230 [2021-05-03 16:05:33,068 INFO L226 Difference]: Without dead ends: 29115 [2021-05-03 16:05:33,068 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 453.2ms TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2021-05-03 16:05:33,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29115 states. [2021-05-03 16:05:33,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29115 to 13767. [2021-05-03 16:05:33,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13767 states, 13766 states have (on average 4.136713642307133) internal successors, (56946), 13766 states have internal predecessors, (56946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:33,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13767 states to 13767 states and 56946 transitions. [2021-05-03 16:05:33,610 INFO L78 Accepts]: Start accepts. Automaton has 13767 states and 56946 transitions. Word has length 34 [2021-05-03 16:05:33,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:05:33,610 INFO L480 AbstractCegarLoop]: Abstraction has 13767 states and 56946 transitions. [2021-05-03 16:05:33,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:33,610 INFO L276 IsEmpty]: Start isEmpty. Operand 13767 states and 56946 transitions. [2021-05-03 16:05:33,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-03 16:05:33,654 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:05:33,654 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:05:33,869 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:05:33,869 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:05:33,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:05:33,870 INFO L82 PathProgramCache]: Analyzing trace with hash 607266957, now seen corresponding path program 24 times [2021-05-03 16:05:33,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:05:33,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946949239] [2021-05-03 16:05:33,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:05:33,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:05:33,992 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:33,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946949239] [2021-05-03 16:05:33,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808190325] [2021-05-03 16:05:33,992 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 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 16:05:34,020 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 16:05:34,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:05:34,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-03 16:05:34,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:05:34,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 16:05:34,121 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:34,127 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:34,128 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:34,128 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:23 [2021-05-03 16:05:34,258 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:05:34,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-05-03 16:05:34,260 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:34,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:34,263 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:34,263 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-05-03 16:05:34,290 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:34,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:05:34,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-05-03 16:05:34,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55202695] [2021-05-03 16:05:34,291 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 16:05:34,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:05:34,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 16:05:34,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-05-03 16:05:34,292 INFO L87 Difference]: Start difference. First operand 13767 states and 56946 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:34,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:05:34,844 INFO L93 Difference]: Finished difference Result 24762 states and 100856 transitions. [2021-05-03 16:05:34,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 16:05:34,845 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-03 16:05:34,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:05:34,969 INFO L225 Difference]: With dead ends: 24762 [2021-05-03 16:05:34,969 INFO L226 Difference]: Without dead ends: 24647 [2021-05-03 16:05:34,970 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 375.9ms TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-05-03 16:05:35,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24647 states. [2021-05-03 16:05:35,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24647 to 13308. [2021-05-03 16:05:35,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13308 states, 13307 states have (on average 4.129631021267002) internal successors, (54953), 13307 states have internal predecessors, (54953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:35,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13308 states to 13308 states and 54953 transitions. [2021-05-03 16:05:35,624 INFO L78 Accepts]: Start accepts. Automaton has 13308 states and 54953 transitions. Word has length 34 [2021-05-03 16:05:35,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:05:35,624 INFO L480 AbstractCegarLoop]: Abstraction has 13308 states and 54953 transitions. [2021-05-03 16:05:35,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:35,624 INFO L276 IsEmpty]: Start isEmpty. Operand 13308 states and 54953 transitions. [2021-05-03 16:05:35,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-03 16:05:35,669 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:05:35,669 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:05:35,870 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-05-03 16:05:35,870 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:05:35,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:05:35,871 INFO L82 PathProgramCache]: Analyzing trace with hash -546754701, now seen corresponding path program 25 times [2021-05-03 16:05:35,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:05:35,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050991671] [2021-05-03 16:05:35,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:05:35,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:05:35,975 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:35,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050991671] [2021-05-03 16:05:35,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015555562] [2021-05-03 16:05:35,976 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:05:36,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:05:36,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 16:05:36,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:05:36,198 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:05:36,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 26 [2021-05-03 16:05:36,200 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:36,208 INFO L628 ElimStorePlain]: treesize reduction 7, result has 65.0 percent of original size [2021-05-03 16:05:36,209 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:36,209 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:13 [2021-05-03 16:05:36,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 16:05:36,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:36,247 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:36,248 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:36,248 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:5 [2021-05-03 16:05:36,268 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:36,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:05:36,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-05-03 16:05:36,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200510358] [2021-05-03 16:05:36,268 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 16:05:36,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:05:36,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 16:05:36,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-05-03 16:05:36,269 INFO L87 Difference]: Start difference. First operand 13308 states and 54953 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) 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 16:05:37,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:05:37,448 INFO L93 Difference]: Finished difference Result 30843 states and 125658 transitions. [2021-05-03 16:05:37,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 16:05:37,449 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) 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 34 [2021-05-03 16:05:37,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:05:37,599 INFO L225 Difference]: With dead ends: 30843 [2021-05-03 16:05:37,599 INFO L226 Difference]: Without dead ends: 30768 [2021-05-03 16:05:37,599 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 448.9ms TimeCoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2021-05-03 16:05:37,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30768 states. [2021-05-03 16:05:38,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30768 to 14991. [2021-05-03 16:05:38,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14991 states, 14990 states have (on average 4.145030020013342) internal successors, (62134), 14990 states have internal predecessors, (62134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:38,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14991 states to 14991 states and 62134 transitions. [2021-05-03 16:05:38,402 INFO L78 Accepts]: Start accepts. Automaton has 14991 states and 62134 transitions. Word has length 34 [2021-05-03 16:05:38,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:05:38,402 INFO L480 AbstractCegarLoop]: Abstraction has 14991 states and 62134 transitions. [2021-05-03 16:05:38,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8666666666666667) 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 16:05:38,410 INFO L276 IsEmpty]: Start isEmpty. Operand 14991 states and 62134 transitions. [2021-05-03 16:05:38,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-03 16:05:38,459 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:05:38,459 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:05:38,660 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:05:38,661 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:05:38,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:05:38,661 INFO L82 PathProgramCache]: Analyzing trace with hash -290099239, now seen corresponding path program 26 times [2021-05-03 16:05:38,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:05:38,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162691265] [2021-05-03 16:05:38,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:05:38,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:05:38,749 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:38,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162691265] [2021-05-03 16:05:38,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188124522] [2021-05-03 16:05:38,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:05:38,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 16:05:38,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:05:38,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 16:05:38,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:05:38,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2021-05-03 16:05:38,918 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:38,926 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:38,927 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:38,927 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:27 [2021-05-03 16:05:38,959 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:05:38,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-05-03 16:05:38,961 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:38,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:38,963 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:38,964 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-05-03 16:05:38,989 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:38,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:05:38,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-05-03 16:05:38,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2378440] [2021-05-03 16:05:38,992 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 16:05:38,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:05:38,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 16:05:38,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-03 16:05:38,993 INFO L87 Difference]: Start difference. First operand 14991 states and 62134 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:39,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:05:39,881 INFO L93 Difference]: Finished difference Result 28364 states and 115770 transitions. [2021-05-03 16:05:39,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 16:05:39,883 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-03 16:05:39,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:05:40,035 INFO L225 Difference]: With dead ends: 28364 [2021-05-03 16:05:40,035 INFO L226 Difference]: Without dead ends: 28249 [2021-05-03 16:05:40,036 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 263.2ms TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-05-03 16:05:40,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28249 states. [2021-05-03 16:05:40,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28249 to 14487. [2021-05-03 16:05:40,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14487 states, 14486 states have (on average 4.141930139444981) internal successors, (60000), 14486 states have internal predecessors, (60000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:40,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14487 states to 14487 states and 60000 transitions. [2021-05-03 16:05:40,605 INFO L78 Accepts]: Start accepts. Automaton has 14487 states and 60000 transitions. Word has length 34 [2021-05-03 16:05:40,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:05:40,606 INFO L480 AbstractCegarLoop]: Abstraction has 14487 states and 60000 transitions. [2021-05-03 16:05:40,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:40,606 INFO L276 IsEmpty]: Start isEmpty. Operand 14487 states and 60000 transitions. [2021-05-03 16:05:40,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-03 16:05:40,654 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:05:40,654 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:05:40,854 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-05-03 16:05:40,854 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:05:40,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:05:40,855 INFO L82 PathProgramCache]: Analyzing trace with hash 212916957, now seen corresponding path program 27 times [2021-05-03 16:05:40,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:05:40,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665304594] [2021-05-03 16:05:40,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:05:40,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:05:40,933 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:40,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665304594] [2021-05-03 16:05:40,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395304351] [2021-05-03 16:05:40,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:05:41,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 16:05:41,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:05:41,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 16:05:41,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:05:41,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2021-05-03 16:05:41,178 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:41,184 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:41,185 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:41,185 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:29 [2021-05-03 16:05:41,237 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-05-03 16:05:41,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-05-03 16:05:41,239 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:41,240 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:41,240 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:41,240 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:3 [2021-05-03 16:05:41,264 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:41,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:05:41,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-05-03 16:05:41,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549395181] [2021-05-03 16:05:41,264 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 16:05:41,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:05:41,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 16:05:41,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-05-03 16:05:41,265 INFO L87 Difference]: Start difference. First operand 14487 states and 60000 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:42,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:05:42,044 INFO L93 Difference]: Finished difference Result 30736 states and 125294 transitions. [2021-05-03 16:05:42,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 16:05:42,045 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-03 16:05:42,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:05:42,186 INFO L225 Difference]: With dead ends: 30736 [2021-05-03 16:05:42,186 INFO L226 Difference]: Without dead ends: 30501 [2021-05-03 16:05:42,186 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 308.4ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-05-03 16:05:42,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30501 states. [2021-05-03 16:05:42,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30501 to 13662. [2021-05-03 16:05:42,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13662 states, 13661 states have (on average 4.144498938584291) internal successors, (56618), 13661 states have internal predecessors, (56618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:42,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13662 states to 13662 states and 56618 transitions. [2021-05-03 16:05:42,706 INFO L78 Accepts]: Start accepts. Automaton has 13662 states and 56618 transitions. Word has length 34 [2021-05-03 16:05:42,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:05:42,706 INFO L480 AbstractCegarLoop]: Abstraction has 13662 states and 56618 transitions. [2021-05-03 16:05:42,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:42,706 INFO L276 IsEmpty]: Start isEmpty. Operand 13662 states and 56618 transitions. [2021-05-03 16:05:42,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-03 16:05:42,748 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:05:42,748 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:05:42,948 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-05-03 16:05:42,949 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:05:42,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:05:42,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1990239735, now seen corresponding path program 28 times [2021-05-03 16:05:42,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:05:42,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415294411] [2021-05-03 16:05:42,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:05:42,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:05:43,060 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:43,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415294411] [2021-05-03 16:05:43,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512111775] [2021-05-03 16:05:43,061 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:05:43,087 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:05:43,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:05:43,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 16:05:43,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:05:43,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 16:05:43,160 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:43,166 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:43,167 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:43,167 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-05-03 16:05:43,233 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:05:43,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-05-03 16:05:43,235 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:43,242 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:43,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:43,243 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-05-03 16:05:43,268 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:43,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:05:43,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-05-03 16:05:43,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545159872] [2021-05-03 16:05:43,269 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 16:05:43,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:05:43,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 16:05:43,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-03 16:05:43,271 INFO L87 Difference]: Start difference. First operand 13662 states and 56618 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:44,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:05:44,098 INFO L93 Difference]: Finished difference Result 24729 states and 99644 transitions. [2021-05-03 16:05:44,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 16:05:44,099 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-03 16:05:44,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:05:44,203 INFO L225 Difference]: With dead ends: 24729 [2021-05-03 16:05:44,203 INFO L226 Difference]: Without dead ends: 24574 [2021-05-03 16:05:44,204 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 393.4ms TimeCoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2021-05-03 16:05:44,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24574 states. [2021-05-03 16:05:44,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24574 to 13674. [2021-05-03 16:05:44,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13674 states, 13673 states have (on average 4.145103488627221) internal successors, (56676), 13673 states have internal predecessors, (56676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:44,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13674 states to 13674 states and 56676 transitions. [2021-05-03 16:05:44,899 INFO L78 Accepts]: Start accepts. Automaton has 13674 states and 56676 transitions. Word has length 34 [2021-05-03 16:05:44,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:05:44,900 INFO L480 AbstractCegarLoop]: Abstraction has 13674 states and 56676 transitions. [2021-05-03 16:05:44,900 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:44,900 INFO L276 IsEmpty]: Start isEmpty. Operand 13674 states and 56676 transitions. [2021-05-03 16:05:44,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-03 16:05:44,948 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:05:44,948 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:05:45,156 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-05-03 16:05:45,157 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:05:45,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:05:45,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1022414541, now seen corresponding path program 29 times [2021-05-03 16:05:45,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:05:45,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998742615] [2021-05-03 16:05:45,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:05:45,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:05:45,243 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:45,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998742615] [2021-05-03 16:05:45,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722654359] [2021-05-03 16:05:45,244 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:05:45,278 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 16:05:45,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:05:45,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-03 16:05:45,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:05:45,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 16:05:45,352 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:45,357 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:45,358 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:45,358 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:14 [2021-05-03 16:05:45,445 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:45,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-05-03 16:05:45,454 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 16:05:45,462 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:45,469 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:05:45,469 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:19 [2021-05-03 16:05:45,519 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:45,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:05:45,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-05-03 16:05:45,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218956537] [2021-05-03 16:05:45,521 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 16:05:45,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:05:45,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 16:05:45,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-05-03 16:05:45,523 INFO L87 Difference]: Start difference. First operand 13674 states and 56676 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:46,759 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2021-05-03 16:05:46,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:05:46,974 INFO L93 Difference]: Finished difference Result 37613 states and 152667 transitions. [2021-05-03 16:05:46,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 16:05:46,975 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-03 16:05:46,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:05:47,160 INFO L225 Difference]: With dead ends: 37613 [2021-05-03 16:05:47,161 INFO L226 Difference]: Without dead ends: 37323 [2021-05-03 16:05:47,161 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 880.1ms TimeCoverageRelationStatistics Valid=237, Invalid=1023, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 16:05:47,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37323 states. [2021-05-03 16:05:47,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37323 to 14150. [2021-05-03 16:05:47,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14150 states, 14149 states have (on average 4.154003816524136) internal successors, (58775), 14149 states have internal predecessors, (58775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:48,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14150 states to 14150 states and 58775 transitions. [2021-05-03 16:05:48,031 INFO L78 Accepts]: Start accepts. Automaton has 14150 states and 58775 transitions. Word has length 34 [2021-05-03 16:05:48,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:05:48,031 INFO L480 AbstractCegarLoop]: Abstraction has 14150 states and 58775 transitions. [2021-05-03 16:05:48,032 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:48,032 INFO L276 IsEmpty]: Start isEmpty. Operand 14150 states and 58775 transitions. [2021-05-03 16:05:48,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-03 16:05:48,080 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:05:48,080 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:05:48,280 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-05-03 16:05:48,281 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:05:48,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:05:48,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1427456559, now seen corresponding path program 30 times [2021-05-03 16:05:48,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:05:48,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869010249] [2021-05-03 16:05:48,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:05:48,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:05:48,374 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:48,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869010249] [2021-05-03 16:05:48,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701778900] [2021-05-03 16:05:48,375 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:05:48,408 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 16:05:48,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:05:48,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 16:05:48,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:05:48,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 16:05:48,463 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:48,468 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:48,469 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:48,469 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:12 [2021-05-03 16:05:48,593 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:05:48,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-05-03 16:05:48,595 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:48,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:48,597 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:48,597 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-05-03 16:05:48,620 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:48,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:05:48,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-05-03 16:05:48,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982641090] [2021-05-03 16:05:48,622 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 16:05:48,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:05:48,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 16:05:48,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-03 16:05:48,623 INFO L87 Difference]: Start difference. First operand 14150 states and 58775 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:49,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:05:49,204 INFO L93 Difference]: Finished difference Result 22775 states and 92502 transitions. [2021-05-03 16:05:49,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 16:05:49,205 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-03 16:05:49,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:05:49,314 INFO L225 Difference]: With dead ends: 22775 [2021-05-03 16:05:49,314 INFO L226 Difference]: Without dead ends: 22620 [2021-05-03 16:05:49,314 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 303.0ms TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-05-03 16:05:49,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22620 states. [2021-05-03 16:05:49,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22620 to 14182. [2021-05-03 16:05:49,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14182 states, 14181 states have (on average 4.154502503349552) internal successors, (58915), 14181 states have internal predecessors, (58915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:50,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14182 states to 14182 states and 58915 transitions. [2021-05-03 16:05:50,007 INFO L78 Accepts]: Start accepts. Automaton has 14182 states and 58915 transitions. Word has length 34 [2021-05-03 16:05:50,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:05:50,007 INFO L480 AbstractCegarLoop]: Abstraction has 14182 states and 58915 transitions. [2021-05-03 16:05:50,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:50,007 INFO L276 IsEmpty]: Start isEmpty. Operand 14182 states and 58915 transitions. [2021-05-03 16:05:50,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-03 16:05:50,050 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:05:50,050 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:05:50,250 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:05:50,250 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:05:50,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:05:50,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1674195085, now seen corresponding path program 31 times [2021-05-03 16:05:50,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:05:50,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883199082] [2021-05-03 16:05:50,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:05:50,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:05:50,318 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:50,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883199082] [2021-05-03 16:05:50,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556971689] [2021-05-03 16:05:50,318 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:05:50,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:05:50,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 16:05:50,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:05:50,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 16:05:50,410 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:50,414 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:50,415 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:50,415 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:12 [2021-05-03 16:05:50,495 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-03 16:05:50,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-05-03 16:05:50,497 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:50,498 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:50,498 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:50,499 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:3 [2021-05-03 16:05:50,544 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:50,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:05:50,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-05-03 16:05:50,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113286017] [2021-05-03 16:05:50,545 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 16:05:50,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:05:50,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 16:05:50,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-05-03 16:05:50,546 INFO L87 Difference]: Start difference. First operand 14182 states and 58915 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:51,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:05:51,315 INFO L93 Difference]: Finished difference Result 27396 states and 111149 transitions. [2021-05-03 16:05:51,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 16:05:51,317 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-03 16:05:51,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:05:51,452 INFO L225 Difference]: With dead ends: 27396 [2021-05-03 16:05:51,452 INFO L226 Difference]: Without dead ends: 27241 [2021-05-03 16:05:51,453 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 275.6ms TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-05-03 16:05:51,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27241 states. [2021-05-03 16:05:51,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27241 to 14407. [2021-05-03 16:05:51,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14407 states, 14406 states have (on average 4.153685964181591) internal successors, (59838), 14406 states have internal predecessors, (59838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:52,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14407 states to 14407 states and 59838 transitions. [2021-05-03 16:05:52,012 INFO L78 Accepts]: Start accepts. Automaton has 14407 states and 59838 transitions. Word has length 34 [2021-05-03 16:05:52,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:05:52,012 INFO L480 AbstractCegarLoop]: Abstraction has 14407 states and 59838 transitions. [2021-05-03 16:05:52,012 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:52,013 INFO L276 IsEmpty]: Start isEmpty. Operand 14407 states and 59838 transitions. [2021-05-03 16:05:52,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 16:05:52,059 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:05:52,059 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:05:52,272 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:05:52,273 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:05:52,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:05:52,273 INFO L82 PathProgramCache]: Analyzing trace with hash -140783524, now seen corresponding path program 6 times [2021-05-03 16:05:52,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:05:52,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452715700] [2021-05-03 16:05:52,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:05:52,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:05:52,322 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:52,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452715700] [2021-05-03 16:05:52,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193135559] [2021-05-03 16:05:52,323 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:05:52,356 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 16:05:52,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:05:52,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 16:05:52,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:05:52,407 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:52,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:05:52,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 10 [2021-05-03 16:05:52,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576955384] [2021-05-03 16:05:52,408 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 16:05:52,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:05:52,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 16:05:52,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-05-03 16:05:52,409 INFO L87 Difference]: Start difference. First operand 14407 states and 59838 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:52,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:05:52,775 INFO L93 Difference]: Finished difference Result 22943 states and 94680 transitions. [2021-05-03 16:05:52,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 16:05:52,776 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-03 16:05:52,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:05:52,888 INFO L225 Difference]: With dead ends: 22943 [2021-05-03 16:05:52,889 INFO L226 Difference]: Without dead ends: 22609 [2021-05-03 16:05:52,889 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 46.7ms TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-05-03 16:05:52,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22609 states. [2021-05-03 16:05:53,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22609 to 20569. [2021-05-03 16:05:53,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20569 states, 20568 states have (on average 4.176244651886425) internal successors, (85897), 20568 states have internal predecessors, (85897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:53,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20569 states to 20569 states and 85897 transitions. [2021-05-03 16:05:53,766 INFO L78 Accepts]: Start accepts. Automaton has 20569 states and 85897 transitions. Word has length 36 [2021-05-03 16:05:53,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:05:53,766 INFO L480 AbstractCegarLoop]: Abstraction has 20569 states and 85897 transitions. [2021-05-03 16:05:53,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:53,766 INFO L276 IsEmpty]: Start isEmpty. Operand 20569 states and 85897 transitions. [2021-05-03 16:05:53,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 16:05:53,833 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:05:53,833 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:05:54,034 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-05-03 16:05:54,036 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:05:54,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:05:54,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1416997327, now seen corresponding path program 32 times [2021-05-03 16:05:54,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:05:54,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563685744] [2021-05-03 16:05:54,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:05:54,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:05:54,075 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-05-03 16:05:54,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563685744] [2021-05-03 16:05:54,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 16:05:54,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-03 16:05:54,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582298546] [2021-05-03 16:05:54,076 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 16:05:54,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:05:54,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 16:05:54,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-05-03 16:05:54,077 INFO L87 Difference]: Start difference. First operand 20569 states and 85897 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:54,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:05:54,419 INFO L93 Difference]: Finished difference Result 37535 states and 156218 transitions. [2021-05-03 16:05:54,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 16:05:54,420 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-03 16:05:54,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:05:54,618 INFO L225 Difference]: With dead ends: 37535 [2021-05-03 16:05:54,618 INFO L226 Difference]: Without dead ends: 36829 [2021-05-03 16:05:54,618 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.5ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-05-03 16:05:54,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36829 states. [2021-05-03 16:05:55,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36829 to 33540. [2021-05-03 16:05:55,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33540 states, 33539 states have (on average 4.207489788007991) internal successors, (141115), 33539 states have internal predecessors, (141115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:55,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33540 states to 33540 states and 141115 transitions. [2021-05-03 16:05:55,932 INFO L78 Accepts]: Start accepts. Automaton has 33540 states and 141115 transitions. Word has length 36 [2021-05-03 16:05:55,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:05:55,933 INFO L480 AbstractCegarLoop]: Abstraction has 33540 states and 141115 transitions. [2021-05-03 16:05:55,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:05:55,933 INFO L276 IsEmpty]: Start isEmpty. Operand 33540 states and 141115 transitions. [2021-05-03 16:05:56,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:05:56,048 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:05:56,049 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:05:56,049 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2021-05-03 16:05:56,049 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:05:56,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:05:56,049 INFO L82 PathProgramCache]: Analyzing trace with hash -656275528, now seen corresponding path program 7 times [2021-05-03 16:05:56,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:05:56,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577617766] [2021-05-03 16:05:56,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:05:56,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:05:56,184 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:56,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577617766] [2021-05-03 16:05:56,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980462475] [2021-05-03 16:05:56,185 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:05:56,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:05:56,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 16:05:56,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:05:56,769 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-05-03 16:05:56,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 20 [2021-05-03 16:05:56,771 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:05:56,773 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:05:56,773 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:05:56,773 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:3 [2021-05-03 16:05:56,799 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:05:56,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:05:56,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-05-03 16:05:56,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109072579] [2021-05-03 16:05:56,800 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 16:05:56,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:05:56,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 16:05:56,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-05-03 16:05:56,801 INFO L87 Difference]: Start difference. First operand 33540 states and 141115 transitions. Second operand has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 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 16:05:58,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:05:58,413 INFO L93 Difference]: Finished difference Result 59772 states and 246214 transitions. [2021-05-03 16:05:58,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 16:05:58,418 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 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 39 [2021-05-03 16:05:58,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:05:58,734 INFO L225 Difference]: With dead ends: 59772 [2021-05-03 16:05:58,734 INFO L226 Difference]: Without dead ends: 58808 [2021-05-03 16:05:58,735 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 632.4ms TimeCoverageRelationStatistics Valid=136, Invalid=856, Unknown=0, NotChecked=0, Total=992 [2021-05-03 16:05:58,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58808 states. [2021-05-03 16:05:59,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58808 to 33468. [2021-05-03 16:06:00,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33468 states, 33467 states have (on average 4.193265007320644) internal successors, (140336), 33467 states have internal predecessors, (140336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:06:00,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33468 states to 33468 states and 140336 transitions. [2021-05-03 16:06:00,198 INFO L78 Accepts]: Start accepts. Automaton has 33468 states and 140336 transitions. Word has length 39 [2021-05-03 16:06:00,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:06:00,198 INFO L480 AbstractCegarLoop]: Abstraction has 33468 states and 140336 transitions. [2021-05-03 16:06:00,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 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 16:06:00,199 INFO L276 IsEmpty]: Start isEmpty. Operand 33468 states and 140336 transitions. [2021-05-03 16:06:00,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:06:00,306 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:06:00,306 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:06:00,507 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-05-03 16:06:00,507 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:06:00,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:06:00,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1022951253, now seen corresponding path program 33 times [2021-05-03 16:06:00,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:06:00,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971676832] [2021-05-03 16:06:00,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:06:00,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:06:00,638 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:06:00,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971676832] [2021-05-03 16:06:00,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318639085] [2021-05-03 16:06:00,639 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 16:06:00,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 16:06:00,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:06:00,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-03 16:06:00,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:06:00,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:06:00,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:06:00,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:06:00,921 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:06:00,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 46 [2021-05-03 16:06:00,968 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-05-03 16:06:01,019 INFO L628 ElimStorePlain]: treesize reduction 73, result has 35.4 percent of original size [2021-05-03 16:06:01,025 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:06:01,025 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:38 [2021-05-03 16:06:01,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-05-03 16:06:01,145 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:06:01,385 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 8 [2021-05-03 16:06:01,385 INFO L628 ElimStorePlain]: treesize reduction 6, result has 60.0 percent of original size [2021-05-03 16:06:01,386 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:06:01,386 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:9 [2021-05-03 16:06:01,423 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:06:01,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:06:01,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-05-03 16:06:01,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918874984] [2021-05-03 16:06:01,426 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 16:06:01,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:06:01,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 16:06:01,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-05-03 16:06:01,428 INFO L87 Difference]: Start difference. First operand 33468 states and 140336 transitions. Second operand has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 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 16:06:04,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:06:04,892 INFO L93 Difference]: Finished difference Result 77832 states and 316391 transitions. [2021-05-03 16:06:04,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-03 16:06:04,893 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 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 39 [2021-05-03 16:06:04,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:06:05,244 INFO L225 Difference]: With dead ends: 77832 [2021-05-03 16:06:05,244 INFO L226 Difference]: Without dead ends: 77444 [2021-05-03 16:06:05,245 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 1926.7ms TimeCoverageRelationStatistics Valid=551, Invalid=3109, Unknown=0, NotChecked=0, Total=3660 [2021-05-03 16:06:05,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77444 states. [2021-05-03 16:06:06,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77444 to 34685. [2021-05-03 16:06:06,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34685 states, 34684 states have (on average 4.195969323030792) internal successors, (145533), 34684 states have internal predecessors, (145533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:06:07,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34685 states to 34685 states and 145533 transitions. [2021-05-03 16:06:07,193 INFO L78 Accepts]: Start accepts. Automaton has 34685 states and 145533 transitions. Word has length 39 [2021-05-03 16:06:07,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:06:07,195 INFO L480 AbstractCegarLoop]: Abstraction has 34685 states and 145533 transitions. [2021-05-03 16:06:07,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 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 16:06:07,195 INFO L276 IsEmpty]: Start isEmpty. Operand 34685 states and 145533 transitions. [2021-05-03 16:06:07,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:06:07,315 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:06:07,315 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:06:07,515 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-05-03 16:06:07,516 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:06:07,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:06:07,516 INFO L82 PathProgramCache]: Analyzing trace with hash -1976270763, now seen corresponding path program 34 times [2021-05-03 16:06:07,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:06:07,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654471458] [2021-05-03 16:06:07,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:06:07,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:06:07,666 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:06:07,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654471458] [2021-05-03 16:06:07,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162160339] [2021-05-03 16:06:07,667 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 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 16:06:07,699 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 16:06:07,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:06:07,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 16:06:07,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:06:07,942 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-05-03 16:06:07,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 37 [2021-05-03 16:06:07,945 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:06:07,953 INFO L628 ElimStorePlain]: treesize reduction 16, result has 44.8 percent of original size [2021-05-03 16:06:07,954 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:06:07,954 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:67, output treesize:13 [2021-05-03 16:06:07,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 16:06:07,989 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:06:07,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:06:07,992 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 16:06:07,992 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:7 [2021-05-03 16:06:08,030 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:06:08,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:06:08,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-05-03 16:06:08,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395882712] [2021-05-03 16:06:08,030 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 16:06:08,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:06:08,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 16:06:08,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-05-03 16:06:08,031 INFO L87 Difference]: Start difference. First operand 34685 states and 145533 transitions. Second operand has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 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 16:06:10,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:06:10,405 INFO L93 Difference]: Finished difference Result 85928 states and 351701 transitions. [2021-05-03 16:06:10,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 16:06:10,406 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 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 39 [2021-05-03 16:06:10,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:06:10,840 INFO L225 Difference]: With dead ends: 85928 [2021-05-03 16:06:10,841 INFO L226 Difference]: Without dead ends: 85554 [2021-05-03 16:06:10,841 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 759.5ms TimeCoverageRelationStatistics Valid=155, Invalid=1105, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 16:06:10,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85554 states. [2021-05-03 16:06:12,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85554 to 35149. [2021-05-03 16:06:12,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35149 states, 35148 states have (on average 4.186383293501764) internal successors, (147143), 35148 states have internal predecessors, (147143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:06:13,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35149 states to 35149 states and 147143 transitions. [2021-05-03 16:06:13,006 INFO L78 Accepts]: Start accepts. Automaton has 35149 states and 147143 transitions. Word has length 39 [2021-05-03 16:06:13,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:06:13,006 INFO L480 AbstractCegarLoop]: Abstraction has 35149 states and 147143 transitions. [2021-05-03 16:06:13,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 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 16:06:13,006 INFO L276 IsEmpty]: Start isEmpty. Operand 35149 states and 147143 transitions. [2021-05-03 16:06:13,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:06:13,116 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:06:13,116 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:06:13,317 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:06:13,317 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:06:13,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:06:13,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1473061487, now seen corresponding path program 35 times [2021-05-03 16:06:13,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:06:13,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751663955] [2021-05-03 16:06:13,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:06:13,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:06:13,443 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:06:13,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751663955] [2021-05-03 16:06:13,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795833374] [2021-05-03 16:06:13,443 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 16:06:13,476 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 16:06:13,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:06:13,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 16:06:13,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:06:13,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-05-03 16:06:13,764 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 16:06:13,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:06:13,773 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 16:06:13,773 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:53, output treesize:45 [2021-05-03 16:06:13,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:06:13,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:06:13,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:06:13,885 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:06:13,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 48 treesize of output 88 [2021-05-03 16:06:14,011 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-05-03 16:06:14,038 INFO L628 ElimStorePlain]: treesize reduction 4, result has 91.1 percent of original size [2021-05-03 16:06:14,049 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-05-03 16:06:14,049 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:35 [2021-05-03 16:06:14,111 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:06:14,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 16:06:14,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-05-03 16:06:14,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527521039] [2021-05-03 16:06:14,111 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 16:06:14,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 16:06:14,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 16:06:14,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-05-03 16:06:14,112 INFO L87 Difference]: Start difference. First operand 35149 states and 147143 transitions. Second operand has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 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 16:06:19,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 16:06:19,146 INFO L93 Difference]: Finished difference Result 132467 states and 537017 transitions. [2021-05-03 16:06:19,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-03 16:06:19,147 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 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 39 [2021-05-03 16:06:19,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 16:06:19,842 INFO L225 Difference]: With dead ends: 132467 [2021-05-03 16:06:19,842 INFO L226 Difference]: Without dead ends: 132109 [2021-05-03 16:06:19,843 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1055 ImplicationChecksByTransitivity, 2689.7ms TimeCoverageRelationStatistics Valid=711, Invalid=3449, Unknown=0, NotChecked=0, Total=4160 [2021-05-03 16:06:20,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132109 states. [2021-05-03 16:06:22,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132109 to 38584. [2021-05-03 16:06:22,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38584 states, 38583 states have (on average 4.202705854910193) internal successors, (162153), 38583 states have internal predecessors, (162153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 16:06:22,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38584 states to 38584 states and 162153 transitions. [2021-05-03 16:06:22,759 INFO L78 Accepts]: Start accepts. Automaton has 38584 states and 162153 transitions. Word has length 39 [2021-05-03 16:06:22,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 16:06:22,760 INFO L480 AbstractCegarLoop]: Abstraction has 38584 states and 162153 transitions. [2021-05-03 16:06:22,760 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 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 16:06:22,760 INFO L276 IsEmpty]: Start isEmpty. Operand 38584 states and 162153 transitions. [2021-05-03 16:06:22,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-03 16:06:22,868 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 16:06:22,868 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 16:06:23,068 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 16:06:23,069 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 16:06:23,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 16:06:23,069 INFO L82 PathProgramCache]: Analyzing trace with hash -497015271, now seen corresponding path program 36 times [2021-05-03 16:06:23,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 16:06:23,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11884943] [2021-05-03 16:06:23,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 16:06:23,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 16:06:23,217 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 16:06:23,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11884943] [2021-05-03 16:06:23,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873098033] [2021-05-03 16:06:23,217 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 16:06:23,254 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 16:06:23,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 16:06:23,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 16:06:23,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 16:06:23,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:06:23,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:06:23,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:06:23,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:06:23,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:06:23,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:06:23,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 16:06:23,507 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 16:06:23,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 69 [2021-05-03 16:06:23,541 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-05-03 16:06:23,568 INFO L628 ElimStorePlain]: treesize reduction 50, result has 42.5 percent of original size [2021-05-03 16:06:23,573 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 16:06:23,573 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:79, output treesize:36 [2021-05-03 16:06:23,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 79 [2021-05-03 16:06:24,155 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 489 DAG size of output: 373 [2021-05-03 16:06:25,161 WARN L205 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 1684 DAG size of output: 1675 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown