/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/dot-product-array.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-05 23:49:27,315 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 23:49:27,317 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 23:49:27,342 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-05 23:49:27,342 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-05 23:49:27,343 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-05 23:49:27,344 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-05 23:49:27,346 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-05 23:49:27,360 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-05 23:49:27,364 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-05 23:49:27,365 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-05 23:49:27,367 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-05 23:49:27,367 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-05 23:49:27,369 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-05 23:49:27,370 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-05 23:49:27,373 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-05 23:49:27,375 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-05 23:49:27,375 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-05 23:49:27,379 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-05 23:49:27,385 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-05 23:49:27,386 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-05 23:49:27,387 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-05 23:49:27,388 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-05 23:49:27,390 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-05 23:49:27,398 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-06-05 23:49:27,399 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-06-05 23:49:27,399 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-06-05 23:49:27,400 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-06-05 23:49:27,401 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-06-05 23:49:27,401 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-06-05 23:49:27,401 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-06-05 23:49:27,402 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-06-05 23:49:27,403 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-06-05 23:49:27,404 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-06-05 23:49:27,405 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-06-05 23:49:27,405 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-06-05 23:49:27,405 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-06-05 23:49:27,406 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-06-05 23:49:27,406 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 23:49:27,406 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 23:49:27,407 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 23:49:27,411 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 [2021-06-05 23:49:27,458 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 23:49:27,458 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 23:49:27,458 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 23:49:27,458 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 23:49:27,460 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 23:49:27,461 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 23:49:27,461 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 23:49:27,461 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 23:49:27,461 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 23:49:27,461 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 23:49:27,462 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 23:49:27,462 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 23:49:27,462 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 23:49:27,462 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 23:49:27,462 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 23:49:27,463 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 23:49:27,463 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 23:49:27,463 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 23:49:27,463 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 23:49:27,463 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 23:49:27,463 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 23:49:27,464 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 23:49:27,464 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 23:49:27,464 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 23:49:27,464 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 23:49:27,464 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 23:49:27,464 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 23:49:27,464 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 23:49:27,465 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 23:49:27,465 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 23:49:27,465 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 23:49:27,465 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 23:49:27,753 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 23:49:27,775 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 23:49:27,777 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 23:49:27,778 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 23:49:27,780 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 23:49:27,781 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/dot-product-array.wvr.bpl [2021-06-05 23:49:27,781 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/dot-product-array.wvr.bpl' [2021-06-05 23:49:27,816 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 23:49:27,818 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 23:49:27,819 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 23:49:27,819 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 23:49:27,819 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 23:49:27,829 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:49:27" (1/1) ... [2021-06-05 23:49:27,836 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:49:27" (1/1) ... [2021-06-05 23:49:27,842 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 23:49:27,843 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 23:49:27,843 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 23:49:27,844 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 23:49:27,849 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:49:27" (1/1) ... [2021-06-05 23:49:27,849 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:49:27" (1/1) ... [2021-06-05 23:49:27,850 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:49:27" (1/1) ... [2021-06-05 23:49:27,850 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:49:27" (1/1) ... [2021-06-05 23:49:27,854 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:49:27" (1/1) ... [2021-06-05 23:49:27,858 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:49:27" (1/1) ... [2021-06-05 23:49:27,858 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:49:27" (1/1) ... [2021-06-05 23:49:27,859 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 23:49:27,860 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 23:49:27,860 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 23:49:27,860 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 23:49:27,864 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:49:27" (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 [2021-06-05 23:49:27,928 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 23:49:27,928 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 23:49:27,929 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 23:49:27,929 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 23:49:27,929 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 23:49:27,929 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 23:49:27,929 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 23:49:27,929 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 23:49:27,929 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 23:49:27,930 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 23:49:27,930 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 23:49:27,930 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 23:49:27,930 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 23:49:28,085 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 23:49:28,086 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 23:49:28,087 INFO L202 PluginConnector]: Adding new model dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 11:49:28 BoogieIcfgContainer [2021-06-05 23:49:28,088 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 23:49:28,089 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 23:49:28,089 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 23:49:28,092 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 23:49:28,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:49:27" (1/2) ... [2021-06-05 23:49:28,093 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@687ff2ce and model type dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 11:49:28, skipping insertion in model container [2021-06-05 23:49:28,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 11:49:28" (2/2) ... [2021-06-05 23:49:28,094 INFO L111 eAbstractionObserver]: Analyzing ICFG dot-product-array.wvr.bpl [2021-06-05 23:49:28,098 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 23:49:28,099 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 23:49:28,099 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 23:49:28,100 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 23:49:28,132 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 23:49:28,156 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 23:49:28,171 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 23:49:28,172 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 23:49:28,172 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 23:49:28,172 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 23:49:28,172 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 23:49:28,172 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 23:49:28,172 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 23:49:28,172 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-05 23:49:28,181 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2021-06-05 23:49:28,200 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:28,202 INFO L276 IsEmpty]: Start isEmpty. Operand has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:28,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 23:49:28,210 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:28,210 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:49:28,211 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:28,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:28,215 INFO L82 PathProgramCache]: Analyzing trace with hash 952922745, now seen corresponding path program 1 times [2021-06-05 23:49:28,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:28,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783955578] [2021-06-05 23:49:28,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:28,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:28,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:28,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:28,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783955578] [2021-06-05 23:49:28,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783955578] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:49:28,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:49:28,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 23:49:28,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288626751] [2021-06-05 23:49:28,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 23:49:28,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:28,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 23:49:28,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:49:28,461 INFO L87 Difference]: Start difference. First operand has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 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 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:28,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:28,507 INFO L93 Difference]: Finished difference Result 217 states and 617 transitions. [2021-06-05 23:49:28,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 23:49:28,509 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 23:49:28,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:28,526 INFO L225 Difference]: With dead ends: 217 [2021-06-05 23:49:28,526 INFO L226 Difference]: Without dead ends: 202 [2021-06-05 23:49:28,528 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:49:28,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-06-05 23:49:28,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 149. [2021-06-05 23:49:28,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.831081081081081) internal successors, (419), 148 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:28,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 419 transitions. [2021-06-05 23:49:28,597 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 419 transitions. Word has length 18 [2021-06-05 23:49:28,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:28,598 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 419 transitions. [2021-06-05 23:49:28,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:28,598 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 419 transitions. [2021-06-05 23:49:28,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 23:49:28,600 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:28,600 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:49:28,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 23:49:28,604 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:28,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:28,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1603966247, now seen corresponding path program 1 times [2021-06-05 23:49:28,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:28,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156914700] [2021-06-05 23:49:28,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:28,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:28,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:49:28,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:28,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156914700] [2021-06-05 23:49:28,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156914700] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:49:28,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:49:28,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 23:49:28,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806477224] [2021-06-05 23:49:28,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 23:49:28,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:28,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 23:49:28,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 23:49:28,698 INFO L87 Difference]: Start difference. First operand 149 states and 419 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:28,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:28,752 INFO L93 Difference]: Finished difference Result 158 states and 445 transitions. [2021-06-05 23:49:28,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 23:49:28,753 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 23:49:28,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:28,755 INFO L225 Difference]: With dead ends: 158 [2021-06-05 23:49:28,756 INFO L226 Difference]: Without dead ends: 158 [2021-06-05 23:49:28,757 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 23:49:28,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-06-05 23:49:28,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 133. [2021-06-05 23:49:28,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.8333333333333335) internal successors, (374), 132 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:28,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2021-06-05 23:49:28,774 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 20 [2021-06-05 23:49:28,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:28,774 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2021-06-05 23:49:28,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:28,774 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2021-06-05 23:49:28,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 23:49:28,776 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:28,776 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:49:28,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 23:49:28,779 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:28,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:28,780 INFO L82 PathProgramCache]: Analyzing trace with hash 5118359, now seen corresponding path program 1 times [2021-06-05 23:49:28,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:28,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550535304] [2021-06-05 23:49:28,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:28,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:28,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:49:28,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:28,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550535304] [2021-06-05 23:49:28,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550535304] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:49:28,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:49:28,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 23:49:28,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623220955] [2021-06-05 23:49:28,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 23:49:28,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:28,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 23:49:28,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 23:49:28,834 INFO L87 Difference]: Start difference. First operand 133 states and 374 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:28,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:28,870 INFO L93 Difference]: Finished difference Result 183 states and 522 transitions. [2021-06-05 23:49:28,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 23:49:28,871 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 23:49:28,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:28,872 INFO L225 Difference]: With dead ends: 183 [2021-06-05 23:49:28,872 INFO L226 Difference]: Without dead ends: 183 [2021-06-05 23:49:28,873 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 23:49:28,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-06-05 23:49:28,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 158. [2021-06-05 23:49:28,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8535031847133756) internal successors, (448), 157 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:28,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2021-06-05 23:49:28,881 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2021-06-05 23:49:28,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:28,882 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2021-06-05 23:49:28,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:28,882 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2021-06-05 23:49:28,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 23:49:28,883 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:28,883 INFO L554 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] [2021-06-05 23:49:28,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 23:49:28,884 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:28,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:28,884 INFO L82 PathProgramCache]: Analyzing trace with hash -443909641, now seen corresponding path program 1 times [2021-06-05 23:49:28,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:28,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931883785] [2021-06-05 23:49:28,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:28,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:29,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:29,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:29,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931883785] [2021-06-05 23:49:29,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931883785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:29,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867628780] [2021-06-05 23:49:29,133 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 [2021-06-05 23:49:29,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:29,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 23:49:29,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:29,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:49:29,499 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-06-05 23:49:29,504 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:49:29,511 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:29,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:49:29,515 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-06-05 23:49:29,520 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:49:29,529 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:29,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 7 [2021-06-05 23:49:29,535 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:49:29,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:29,549 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:49:29,550 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:29, output treesize:3 [2021-06-05 23:49:29,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:29,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867628780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:29,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:29,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 23:49:29,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446052245] [2021-06-05 23:49:29,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 23:49:29,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:29,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 23:49:29,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:49:29,593 INFO L87 Difference]: Start difference. First operand 158 states and 448 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-06-05 23:49:29,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:29,809 INFO L93 Difference]: Finished difference Result 330 states and 935 transitions. [2021-06-05 23:49:29,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 23:49:29,810 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 23:49:29,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:29,813 INFO L225 Difference]: With dead ends: 330 [2021-06-05 23:49:29,813 INFO L226 Difference]: Without dead ends: 315 [2021-06-05 23:49:29,815 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 303.4ms TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:49:29,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-06-05 23:49:29,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 224. [2021-06-05 23:49:29,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.8699551569506725) internal successors, (640), 223 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:29,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2021-06-05 23:49:29,836 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2021-06-05 23:49:29,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:29,838 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2021-06-05 23:49:29,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-06-05 23:49:29,838 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2021-06-05 23:49:29,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 23:49:29,843 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:29,843 INFO L554 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] [2021-06-05 23:49:30,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:49:30,069 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:30,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:30,069 INFO L82 PathProgramCache]: Analyzing trace with hash -611718733, now seen corresponding path program 2 times [2021-06-05 23:49:30,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:30,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343450366] [2021-06-05 23:49:30,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:30,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:30,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:30,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:30,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343450366] [2021-06-05 23:49:30,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343450366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:30,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190931633] [2021-06-05 23:49:30,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:49:30,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:49:30,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:49:30,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 23:49:30,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:30,525 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:30,526 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 23 treesize of output 27 [2021-06-05 23:49:30,567 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:49:30,580 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:30,594 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:30,595 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 19 treesize of output 23 [2021-06-05 23:49:30,643 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:49:30,664 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:30,682 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:30,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 19 [2021-06-05 23:49:30,687 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 23:49:30,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:30,735 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:49:30,735 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:32, output treesize:19 [2021-06-05 23:49:30,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:30,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190931633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:30,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:30,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-06-05 23:49:30,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322581754] [2021-06-05 23:49:30,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 23:49:30,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:30,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 23:49:30,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:49:30,806 INFO L87 Difference]: Start difference. First operand 224 states and 640 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:31,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:31,211 INFO L93 Difference]: Finished difference Result 374 states and 1077 transitions. [2021-06-05 23:49:31,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 23:49:31,211 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 23:49:31,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:31,214 INFO L225 Difference]: With dead ends: 374 [2021-06-05 23:49:31,214 INFO L226 Difference]: Without dead ends: 359 [2021-06-05 23:49:31,214 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 453.5ms TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:49:31,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-06-05 23:49:31,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 229. [2021-06-05 23:49:31,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.912280701754386) internal successors, (664), 228 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:31,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2021-06-05 23:49:31,222 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2021-06-05 23:49:31,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:31,222 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2021-06-05 23:49:31,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:31,223 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2021-06-05 23:49:31,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 23:49:31,224 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:31,224 INFO L554 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] [2021-06-05 23:49:31,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:49:31,437 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:31,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:31,438 INFO L82 PathProgramCache]: Analyzing trace with hash -312945285, now seen corresponding path program 3 times [2021-06-05 23:49:31,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:31,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906819264] [2021-06-05 23:49:31,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:31,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:31,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:31,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:31,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906819264] [2021-06-05 23:49:31,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906819264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:31,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875133882] [2021-06-05 23:49:31,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:49:31,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 23:49:31,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:49:31,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 23:49:31,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:31,717 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 23 treesize of output 19 [2021-06-05 23:49:31,720 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:49:31,727 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:31,729 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 [2021-06-05 23:49:31,732 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:49:31,738 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:31,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 7 [2021-06-05 23:49:31,741 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:49:31,745 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:31,749 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:49:31,750 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:31, output treesize:3 [2021-06-05 23:49:31,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:31,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875133882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:31,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:31,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 23:49:31,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3317997] [2021-06-05 23:49:31,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 23:49:31,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:31,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 23:49:31,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:49:31,781 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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) [2021-06-05 23:49:31,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:31,952 INFO L93 Difference]: Finished difference Result 363 states and 1038 transitions. [2021-06-05 23:49:31,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 23:49:31,953 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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 22 [2021-06-05 23:49:31,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:31,955 INFO L225 Difference]: With dead ends: 363 [2021-06-05 23:49:31,955 INFO L226 Difference]: Without dead ends: 348 [2021-06-05 23:49:31,955 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 207.1ms TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 23:49:31,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-06-05 23:49:31,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 241. [2021-06-05 23:49:31,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.8916666666666666) internal successors, (694), 240 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:31,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2021-06-05 23:49:31,963 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2021-06-05 23:49:31,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:31,963 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2021-06-05 23:49:31,963 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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) [2021-06-05 23:49:31,963 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2021-06-05 23:49:31,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 23:49:31,964 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:31,964 INFO L554 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] [2021-06-05 23:49:32,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-05 23:49:32,181 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:32,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:32,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1257880315, now seen corresponding path program 4 times [2021-06-05 23:49:32,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:32,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003355130] [2021-06-05 23:49:32,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:32,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:32,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:32,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:32,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003355130] [2021-06-05 23:49:32,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003355130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:32,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976694420] [2021-06-05 23:49:32,313 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:49:32,352 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:49:32,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:49:32,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 23:49:32,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:32,446 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:32,447 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 23 treesize of output 27 [2021-06-05 23:49:32,480 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:49:32,492 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:32,500 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:32,501 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 19 treesize of output 23 [2021-06-05 23:49:32,537 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:49:32,575 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:32,586 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:32,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 19 [2021-06-05 23:49:32,588 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 23:49:32,609 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:32,628 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:49:32,629 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:34, output treesize:19 [2021-06-05 23:49:32,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:32,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976694420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:32,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:32,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 23:49:32,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583572096] [2021-06-05 23:49:32,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 23:49:32,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:32,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 23:49:32,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:49:32,693 INFO L87 Difference]: Start difference. First operand 241 states and 694 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:32,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:32,927 INFO L93 Difference]: Finished difference Result 425 states and 1233 transitions. [2021-06-05 23:49:32,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 23:49:32,928 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 23:49:32,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:32,931 INFO L225 Difference]: With dead ends: 425 [2021-06-05 23:49:32,931 INFO L226 Difference]: Without dead ends: 410 [2021-06-05 23:49:32,933 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 240.0ms TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:49:32,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-06-05 23:49:32,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 247. [2021-06-05 23:49:32,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.9186991869918697) internal successors, (718), 246 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:32,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2021-06-05 23:49:32,944 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2021-06-05 23:49:32,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:32,946 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2021-06-05 23:49:32,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:32,946 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2021-06-05 23:49:32,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:49:32,947 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:32,947 INFO L554 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] [2021-06-05 23:49:33,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:49:33,161 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:33,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:33,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1884155861, now seen corresponding path program 5 times [2021-06-05 23:49:33,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:33,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146271006] [2021-06-05 23:49:33,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:33,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:33,219 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:33,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:33,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146271006] [2021-06-05 23:49:33,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146271006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:33,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100889366] [2021-06-05 23:49:33,220 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:49:33,272 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:49:33,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:49:33,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:49:33,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:33,362 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:33,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100889366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:33,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:33,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 23:49:33,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557697540] [2021-06-05 23:49:33,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 23:49:33,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:33,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 23:49:33,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:49:33,364 INFO L87 Difference]: Start difference. First operand 247 states and 718 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-06-05 23:49:33,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:33,768 INFO L93 Difference]: Finished difference Result 619 states and 1783 transitions. [2021-06-05 23:49:33,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 23:49:33,769 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 24 [2021-06-05 23:49:33,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:33,772 INFO L225 Difference]: With dead ends: 619 [2021-06-05 23:49:33,772 INFO L226 Difference]: Without dead ends: 619 [2021-06-05 23:49:33,773 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 245.7ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:49:33,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-06-05 23:49:33,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 297. [2021-06-05 23:49:33,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 3.050675675675676) internal successors, (903), 296 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:33,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 903 transitions. [2021-06-05 23:49:33,782 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 903 transitions. Word has length 24 [2021-06-05 23:49:33,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:33,783 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 903 transitions. [2021-06-05 23:49:33,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-06-05 23:49:33,783 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 903 transitions. [2021-06-05 23:49:33,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:49:33,784 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:33,784 INFO L554 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] [2021-06-05 23:49:34,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:49:34,008 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:34,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:34,009 INFO L82 PathProgramCache]: Analyzing trace with hash 907837017, now seen corresponding path program 6 times [2021-06-05 23:49:34,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:34,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126988226] [2021-06-05 23:49:34,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:34,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:34,059 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:34,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:34,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126988226] [2021-06-05 23:49:34,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126988226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:34,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287993058] [2021-06-05 23:49:34,060 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:49:34,086 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:49:34,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:49:34,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:49:34,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:34,189 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:34,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287993058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:34,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:34,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 23:49:34,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778136394] [2021-06-05 23:49:34,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 23:49:34,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:34,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 23:49:34,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:49:34,191 INFO L87 Difference]: Start difference. First operand 297 states and 903 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-06-05 23:49:35,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:35,010 INFO L93 Difference]: Finished difference Result 1078 states and 2992 transitions. [2021-06-05 23:49:35,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 23:49:35,011 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 24 [2021-06-05 23:49:35,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:35,016 INFO L225 Difference]: With dead ends: 1078 [2021-06-05 23:49:35,017 INFO L226 Difference]: Without dead ends: 1078 [2021-06-05 23:49:35,018 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 509.9ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 23:49:35,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-06-05 23:49:35,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 302. [2021-06-05 23:49:35,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 3.083056478405316) internal successors, (928), 301 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:35,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 928 transitions. [2021-06-05 23:49:35,035 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 928 transitions. Word has length 24 [2021-06-05 23:49:35,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:35,035 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 928 transitions. [2021-06-05 23:49:35,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-06-05 23:49:35,036 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 928 transitions. [2021-06-05 23:49:35,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:49:35,038 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:35,038 INFO L554 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] [2021-06-05 23:49:35,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:49:35,257 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:35,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:35,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1474789097, now seen corresponding path program 7 times [2021-06-05 23:49:35,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:35,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792979874] [2021-06-05 23:49:35,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:35,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:35,304 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:35,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:35,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792979874] [2021-06-05 23:49:35,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792979874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:35,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625948544] [2021-06-05 23:49:35,305 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:49:35,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:35,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:49:35,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:35,450 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:35,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625948544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:35,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:35,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 23:49:35,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480372158] [2021-06-05 23:49:35,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 23:49:35,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:35,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 23:49:35,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:49:35,455 INFO L87 Difference]: Start difference. First operand 302 states and 928 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-06-05 23:49:36,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:36,162 INFO L93 Difference]: Finished difference Result 951 states and 2692 transitions. [2021-06-05 23:49:36,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 23:49:36,162 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 24 [2021-06-05 23:49:36,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:36,167 INFO L225 Difference]: With dead ends: 951 [2021-06-05 23:49:36,167 INFO L226 Difference]: Without dead ends: 951 [2021-06-05 23:49:36,168 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 452.9ms TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 23:49:36,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-06-05 23:49:36,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 293. [2021-06-05 23:49:36,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 3.0616438356164384) internal successors, (894), 292 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:36,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 894 transitions. [2021-06-05 23:49:36,179 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 894 transitions. Word has length 24 [2021-06-05 23:49:36,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:36,179 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 894 transitions. [2021-06-05 23:49:36,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-06-05 23:49:36,179 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 894 transitions. [2021-06-05 23:49:36,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:49:36,180 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:36,180 INFO L554 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] [2021-06-05 23:49:36,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:49:36,403 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:36,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:36,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1884039527, now seen corresponding path program 1 times [2021-06-05 23:49:36,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:36,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391473504] [2021-06-05 23:49:36,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:36,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:36,436 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:49:36,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:36,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391473504] [2021-06-05 23:49:36,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391473504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:36,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018618013] [2021-06-05 23:49:36,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:49:36,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:36,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 23:49:36,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:36,544 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:49:36,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018618013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:36,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:36,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 23:49:36,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080293928] [2021-06-05 23:49:36,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 23:49:36,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:36,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 23:49:36,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 23:49:36,547 INFO L87 Difference]: Start difference. First operand 293 states and 894 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:36,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:36,660 INFO L93 Difference]: Finished difference Result 669 states and 1943 transitions. [2021-06-05 23:49:36,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 23:49:36,660 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 [2021-06-05 23:49:36,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:36,664 INFO L225 Difference]: With dead ends: 669 [2021-06-05 23:49:36,664 INFO L226 Difference]: Without dead ends: 663 [2021-06-05 23:49:36,664 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 64.3ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:49:36,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-06-05 23:49:36,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 413. [2021-06-05 23:49:36,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 3.1699029126213594) internal successors, (1306), 412 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:36,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1306 transitions. [2021-06-05 23:49:36,679 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1306 transitions. Word has length 24 [2021-06-05 23:49:36,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:36,679 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 1306 transitions. [2021-06-05 23:49:36,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:36,679 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1306 transitions. [2021-06-05 23:49:36,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:49:36,681 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:36,681 INFO L554 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] [2021-06-05 23:49:36,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-06-05 23:49:36,901 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:36,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:36,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1973959061, now seen corresponding path program 8 times [2021-06-05 23:49:36,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:36,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332264578] [2021-06-05 23:49:36,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:36,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:36,941 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:36,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:36,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332264578] [2021-06-05 23:49:36,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332264578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:36,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145884060] [2021-06-05 23:49:36,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:49:36,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:49:36,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:49:36,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:49:36,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:37,080 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:37,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145884060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:37,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:37,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 23:49:37,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168679013] [2021-06-05 23:49:37,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 23:49:37,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:37,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 23:49:37,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:49:37,082 INFO L87 Difference]: Start difference. First operand 413 states and 1306 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:37,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:37,280 INFO L93 Difference]: Finished difference Result 710 states and 2124 transitions. [2021-06-05 23:49:37,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 23:49:37,281 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 23:49:37,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:37,288 INFO L225 Difference]: With dead ends: 710 [2021-06-05 23:49:37,288 INFO L226 Difference]: Without dead ends: 672 [2021-06-05 23:49:37,289 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 163.5ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:49:37,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-06-05 23:49:37,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 515. [2021-06-05 23:49:37,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 3.17704280155642) internal successors, (1633), 514 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:37,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1633 transitions. [2021-06-05 23:49:37,306 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1633 transitions. Word has length 24 [2021-06-05 23:49:37,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:37,307 INFO L482 AbstractCegarLoop]: Abstraction has 515 states and 1633 transitions. [2021-06-05 23:49:37,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:37,307 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1633 transitions. [2021-06-05 23:49:37,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:49:37,308 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:37,308 INFO L554 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] [2021-06-05 23:49:37,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:49:37,525 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:37,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:37,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1268001729, now seen corresponding path program 2 times [2021-06-05 23:49:37,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:37,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235505156] [2021-06-05 23:49:37,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:37,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:37,557 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:49:37,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:37,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235505156] [2021-06-05 23:49:37,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235505156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:37,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138704694] [2021-06-05 23:49:37,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 23:49:37,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:49:37,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:49:37,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 23:49:37,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:37,655 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:49:37,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138704694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:37,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:37,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 23:49:37,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206548704] [2021-06-05 23:49:37,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 23:49:37,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:37,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 23:49:37,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 23:49:37,657 INFO L87 Difference]: Start difference. First operand 515 states and 1633 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:37,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:37,776 INFO L93 Difference]: Finished difference Result 830 states and 2453 transitions. [2021-06-05 23:49:37,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 23:49:37,776 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 [2021-06-05 23:49:37,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:37,781 INFO L225 Difference]: With dead ends: 830 [2021-06-05 23:49:37,781 INFO L226 Difference]: Without dead ends: 830 [2021-06-05 23:49:37,781 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 67.0ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:49:37,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-06-05 23:49:37,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 530. [2021-06-05 23:49:37,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 529 states have (on average 3.153119092627599) internal successors, (1668), 529 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:37,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1668 transitions. [2021-06-05 23:49:37,797 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1668 transitions. Word has length 24 [2021-06-05 23:49:37,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:37,797 INFO L482 AbstractCegarLoop]: Abstraction has 530 states and 1668 transitions. [2021-06-05 23:49:37,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:37,798 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1668 transitions. [2021-06-05 23:49:37,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:49:37,799 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:37,799 INFO L554 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] [2021-06-05 23:49:38,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:49:38,024 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:38,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:38,024 INFO L82 PathProgramCache]: Analyzing trace with hash -78679837, now seen corresponding path program 9 times [2021-06-05 23:49:38,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:38,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759060747] [2021-06-05 23:49:38,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:38,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:38,068 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:38,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:38,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759060747] [2021-06-05 23:49:38,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759060747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:38,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85517266] [2021-06-05 23:49:38,069 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 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 [2021-06-05 23:49:38,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:49:38,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:49:38,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:49:38,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:38,203 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:38,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85517266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:38,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:38,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 23:49:38,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875633977] [2021-06-05 23:49:38,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 23:49:38,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:38,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 23:49:38,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:49:38,207 INFO L87 Difference]: Start difference. First operand 530 states and 1668 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:38,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:38,542 INFO L93 Difference]: Finished difference Result 1196 states and 3492 transitions. [2021-06-05 23:49:38,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 23:49:38,543 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 [2021-06-05 23:49:38,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:38,549 INFO L225 Difference]: With dead ends: 1196 [2021-06-05 23:49:38,549 INFO L226 Difference]: Without dead ends: 1196 [2021-06-05 23:49:38,550 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 187.1ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:49:38,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-06-05 23:49:38,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 542. [2021-06-05 23:49:38,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 3.1497227356746764) internal successors, (1704), 541 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:38,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1704 transitions. [2021-06-05 23:49:38,569 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1704 transitions. Word has length 24 [2021-06-05 23:49:38,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:38,569 INFO L482 AbstractCegarLoop]: Abstraction has 542 states and 1704 transitions. [2021-06-05 23:49:38,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:38,569 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1704 transitions. [2021-06-05 23:49:38,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:49:38,571 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:38,571 INFO L554 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] [2021-06-05 23:49:38,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-05 23:49:38,785 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:38,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:38,785 INFO L82 PathProgramCache]: Analyzing trace with hash 706234257, now seen corresponding path program 10 times [2021-06-05 23:49:38,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:38,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408842099] [2021-06-05 23:49:38,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:38,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:38,840 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:38,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:38,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408842099] [2021-06-05 23:49:38,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408842099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:38,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382482346] [2021-06-05 23:49:38,841 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 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 [2021-06-05 23:49:38,873 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:49:38,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:49:38,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:49:38,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:38,963 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:38,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382482346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:38,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:38,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 23:49:38,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441444633] [2021-06-05 23:49:38,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 23:49:38,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:38,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 23:49:38,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:49:38,965 INFO L87 Difference]: Start difference. First operand 542 states and 1704 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:39,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:39,402 INFO L93 Difference]: Finished difference Result 1492 states and 4245 transitions. [2021-06-05 23:49:39,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 23:49:39,403 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 [2021-06-05 23:49:39,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:39,410 INFO L225 Difference]: With dead ends: 1492 [2021-06-05 23:49:39,411 INFO L226 Difference]: Without dead ends: 1492 [2021-06-05 23:49:39,411 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 269.2ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:49:39,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-06-05 23:49:39,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 586. [2021-06-05 23:49:39,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 3.1555555555555554) internal successors, (1846), 585 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:39,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1846 transitions. [2021-06-05 23:49:39,435 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1846 transitions. Word has length 24 [2021-06-05 23:49:39,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:39,435 INFO L482 AbstractCegarLoop]: Abstraction has 586 states and 1846 transitions. [2021-06-05 23:49:39,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:39,435 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1846 transitions. [2021-06-05 23:49:39,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:49:39,436 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:39,437 INFO L554 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] [2021-06-05 23:49:39,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-05 23:49:39,660 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:39,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:39,660 INFO L82 PathProgramCache]: Analyzing trace with hash -376788399, now seen corresponding path program 11 times [2021-06-05 23:49:39,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:39,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4872795] [2021-06-05 23:49:39,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:39,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:39,701 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:39,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:39,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4872795] [2021-06-05 23:49:39,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4872795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:39,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137784166] [2021-06-05 23:49:39,702 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 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 [2021-06-05 23:49:39,730 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:49:39,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:49:39,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:49:39,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:39,831 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:39,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137784166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:39,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:39,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 23:49:39,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282534376] [2021-06-05 23:49:39,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 23:49:39,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:39,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 23:49:39,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:49:39,832 INFO L87 Difference]: Start difference. First operand 586 states and 1846 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:40,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:40,052 INFO L93 Difference]: Finished difference Result 1258 states and 3765 transitions. [2021-06-05 23:49:40,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 23:49:40,053 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 23:49:40,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:40,059 INFO L225 Difference]: With dead ends: 1258 [2021-06-05 23:49:40,059 INFO L226 Difference]: Without dead ends: 1248 [2021-06-05 23:49:40,060 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 168.4ms TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:49:40,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-06-05 23:49:40,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 758. [2021-06-05 23:49:40,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 3.224570673712021) internal successors, (2441), 757 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:40,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2441 transitions. [2021-06-05 23:49:40,091 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2441 transitions. Word has length 24 [2021-06-05 23:49:40,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:40,093 INFO L482 AbstractCegarLoop]: Abstraction has 758 states and 2441 transitions. [2021-06-05 23:49:40,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:40,093 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2441 transitions. [2021-06-05 23:49:40,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:49:40,096 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:40,096 INFO L554 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] [2021-06-05 23:49:40,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 23:49:40,320 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:40,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:40,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1094289719, now seen corresponding path program 12 times [2021-06-05 23:49:40,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:40,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784136270] [2021-06-05 23:49:40,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:40,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:40,363 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:40,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:40,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784136270] [2021-06-05 23:49:40,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784136270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:40,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704531007] [2021-06-05 23:49:40,364 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 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 [2021-06-05 23:49:40,410 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:49:40,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:49:40,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:49:40,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:40,501 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:40,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704531007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:40,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:40,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 23:49:40,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462774941] [2021-06-05 23:49:40,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 23:49:40,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:40,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 23:49:40,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:49:40,503 INFO L87 Difference]: Start difference. First operand 758 states and 2441 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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) [2021-06-05 23:49:40,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:40,762 INFO L93 Difference]: Finished difference Result 1329 states and 4025 transitions. [2021-06-05 23:49:40,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 23:49:40,763 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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 24 [2021-06-05 23:49:40,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:40,768 INFO L225 Difference]: With dead ends: 1329 [2021-06-05 23:49:40,768 INFO L226 Difference]: Without dead ends: 1329 [2021-06-05 23:49:40,769 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 196.1ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:49:40,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-06-05 23:49:40,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 764. [2021-06-05 23:49:40,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 3.220183486238532) internal successors, (2457), 763 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:40,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2457 transitions. [2021-06-05 23:49:40,792 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2457 transitions. Word has length 24 [2021-06-05 23:49:40,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:40,792 INFO L482 AbstractCegarLoop]: Abstraction has 764 states and 2457 transitions. [2021-06-05 23:49:40,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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) [2021-06-05 23:49:40,793 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2457 transitions. [2021-06-05 23:49:40,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:49:40,794 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:40,794 INFO L554 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] [2021-06-05 23:49:41,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:49:41,009 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:41,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:41,009 INFO L82 PathProgramCache]: Analyzing trace with hash 661413115, now seen corresponding path program 13 times [2021-06-05 23:49:41,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:41,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438623703] [2021-06-05 23:49:41,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:41,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:41,045 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:41,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:41,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438623703] [2021-06-05 23:49:41,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438623703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:41,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989932666] [2021-06-05 23:49:41,045 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:49:41,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:41,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:49:41,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:41,131 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:41,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989932666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:41,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:41,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 23:49:41,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948550469] [2021-06-05 23:49:41,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 23:49:41,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:41,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 23:49:41,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:49:41,133 INFO L87 Difference]: Start difference. First operand 764 states and 2457 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:41,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:41,470 INFO L93 Difference]: Finished difference Result 1548 states and 4638 transitions. [2021-06-05 23:49:41,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 23:49:41,471 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 [2021-06-05 23:49:41,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:41,477 INFO L225 Difference]: With dead ends: 1548 [2021-06-05 23:49:41,477 INFO L226 Difference]: Without dead ends: 1544 [2021-06-05 23:49:41,477 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 211.1ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:49:41,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-06-05 23:49:41,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 772. [2021-06-05 23:49:41,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 3.204928664072633) internal successors, (2471), 771 states have internal predecessors, (2471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:41,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2471 transitions. [2021-06-05 23:49:41,507 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2471 transitions. Word has length 24 [2021-06-05 23:49:41,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:41,507 INFO L482 AbstractCegarLoop]: Abstraction has 772 states and 2471 transitions. [2021-06-05 23:49:41,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:41,507 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2471 transitions. [2021-06-05 23:49:41,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:49:41,509 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:41,509 INFO L554 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] [2021-06-05 23:49:41,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:49:41,734 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:41,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:41,734 INFO L82 PathProgramCache]: Analyzing trace with hash 389403925, now seen corresponding path program 14 times [2021-06-05 23:49:41,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:41,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141407531] [2021-06-05 23:49:41,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:41,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:41,781 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:41,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:41,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141407531] [2021-06-05 23:49:41,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141407531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:41,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824883802] [2021-06-05 23:49:41,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:49:41,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:49:41,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:49:41,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:49:41,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:41,903 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:41,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824883802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:41,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:41,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 23:49:41,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075556635] [2021-06-05 23:49:41,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 23:49:41,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:41,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 23:49:41,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:49:41,906 INFO L87 Difference]: Start difference. First operand 772 states and 2471 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-06-05 23:49:42,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:42,635 INFO L93 Difference]: Finished difference Result 2734 states and 8136 transitions. [2021-06-05 23:49:42,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 23:49:42,635 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 24 [2021-06-05 23:49:42,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:42,646 INFO L225 Difference]: With dead ends: 2734 [2021-06-05 23:49:42,646 INFO L226 Difference]: Without dead ends: 2734 [2021-06-05 23:49:42,647 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 443.9ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 23:49:42,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2021-06-05 23:49:42,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 841. [2021-06-05 23:49:42,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 3.3107142857142855) internal successors, (2781), 840 states have internal predecessors, (2781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:42,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2781 transitions. [2021-06-05 23:49:42,682 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2781 transitions. Word has length 24 [2021-06-05 23:49:42,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:42,682 INFO L482 AbstractCegarLoop]: Abstraction has 841 states and 2781 transitions. [2021-06-05 23:49:42,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-06-05 23:49:42,682 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2781 transitions. [2021-06-05 23:49:42,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:49:42,684 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:42,684 INFO L554 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] [2021-06-05 23:49:42,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:49:42,901 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:42,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:42,901 INFO L82 PathProgramCache]: Analyzing trace with hash 956356005, now seen corresponding path program 15 times [2021-06-05 23:49:42,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:42,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097325985] [2021-06-05 23:49:42,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:42,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:42,946 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:42,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:42,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097325985] [2021-06-05 23:49:42,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097325985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:42,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784486462] [2021-06-05 23:49:42,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:49:42,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:49:42,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:49:42,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:49:42,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:43,069 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:43,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784486462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:43,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:43,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 23:49:43,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725132109] [2021-06-05 23:49:43,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 23:49:43,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:43,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 23:49:43,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:49:43,070 INFO L87 Difference]: Start difference. First operand 841 states and 2781 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-06-05 23:49:43,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:43,799 INFO L93 Difference]: Finished difference Result 2693 states and 8043 transitions. [2021-06-05 23:49:43,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 23:49:43,799 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 24 [2021-06-05 23:49:43,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:43,810 INFO L225 Difference]: With dead ends: 2693 [2021-06-05 23:49:43,810 INFO L226 Difference]: Without dead ends: 2693 [2021-06-05 23:49:43,811 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 466.9ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 23:49:43,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-06-05 23:49:43,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 831. [2021-06-05 23:49:43,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 3.289156626506024) internal successors, (2730), 830 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:43,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2730 transitions. [2021-06-05 23:49:43,845 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2730 transitions. Word has length 24 [2021-06-05 23:49:43,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:43,845 INFO L482 AbstractCegarLoop]: Abstraction has 831 states and 2730 transitions. [2021-06-05 23:49:43,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-06-05 23:49:43,846 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2730 transitions. [2021-06-05 23:49:43,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:49:43,847 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:43,847 INFO L554 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] [2021-06-05 23:49:44,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-06-05 23:49:44,067 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:44,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:44,067 INFO L82 PathProgramCache]: Analyzing trace with hash -215989853, now seen corresponding path program 16 times [2021-06-05 23:49:44,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:44,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363511484] [2021-06-05 23:49:44,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:44,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:44,106 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:44,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:44,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363511484] [2021-06-05 23:49:44,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363511484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:44,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607622047] [2021-06-05 23:49:44,107 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 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 [2021-06-05 23:49:44,144 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:49:44,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:49:44,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:49:44,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:44,222 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:44,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607622047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:44,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:44,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 23:49:44,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712246015] [2021-06-05 23:49:44,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 23:49:44,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:44,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 23:49:44,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:49:44,226 INFO L87 Difference]: Start difference. First operand 831 states and 2730 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:44,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:44,884 INFO L93 Difference]: Finished difference Result 2677 states and 7780 transitions. [2021-06-05 23:49:44,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 23:49:44,884 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 23:49:44,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:44,894 INFO L225 Difference]: With dead ends: 2677 [2021-06-05 23:49:44,894 INFO L226 Difference]: Without dead ends: 2677 [2021-06-05 23:49:44,895 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 397.9ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:49:44,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-06-05 23:49:44,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 845. [2021-06-05 23:49:44,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2997630331753554) internal successors, (2785), 844 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:44,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2785 transitions. [2021-06-05 23:49:44,928 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2785 transitions. Word has length 24 [2021-06-05 23:49:44,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:44,928 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2785 transitions. [2021-06-05 23:49:44,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:44,928 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2785 transitions. [2021-06-05 23:49:44,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:49:44,931 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:44,931 INFO L554 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] [2021-06-05 23:49:45,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-06-05 23:49:45,154 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:45,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:45,155 INFO L82 PathProgramCache]: Analyzing trace with hash -134613765, now seen corresponding path program 17 times [2021-06-05 23:49:45,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:45,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333214128] [2021-06-05 23:49:45,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:45,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:45,196 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:45,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:45,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333214128] [2021-06-05 23:49:45,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333214128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:45,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283268077] [2021-06-05 23:49:45,197 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 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 [2021-06-05 23:49:45,221 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:49:45,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:49:45,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:49:45,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:45,281 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:45,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283268077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:45,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:45,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 23:49:45,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27455205] [2021-06-05 23:49:45,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 23:49:45,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:45,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 23:49:45,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:49:45,282 INFO L87 Difference]: Start difference. First operand 845 states and 2785 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:45,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:45,812 INFO L93 Difference]: Finished difference Result 2474 states and 7308 transitions. [2021-06-05 23:49:45,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 23:49:45,813 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 23:49:45,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:45,818 INFO L225 Difference]: With dead ends: 2474 [2021-06-05 23:49:45,818 INFO L226 Difference]: Without dead ends: 2470 [2021-06-05 23:49:45,819 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 320.4ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 23:49:45,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2021-06-05 23:49:45,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 845. [2021-06-05 23:49:45,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2973933649289098) internal successors, (2783), 844 states have internal predecessors, (2783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:45,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2783 transitions. [2021-06-05 23:49:45,851 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2783 transitions. Word has length 24 [2021-06-05 23:49:45,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:45,851 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2783 transitions. [2021-06-05 23:49:45,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:45,851 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2783 transitions. [2021-06-05 23:49:45,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:49:45,853 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:45,853 INFO L554 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] [2021-06-05 23:49:46,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:49:46,069 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:46,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:46,069 INFO L82 PathProgramCache]: Analyzing trace with hash 796043451, now seen corresponding path program 18 times [2021-06-05 23:49:46,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:46,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148298031] [2021-06-05 23:49:46,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:46,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:46,106 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:46,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:46,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148298031] [2021-06-05 23:49:46,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148298031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:46,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588968098] [2021-06-05 23:49:46,106 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 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 [2021-06-05 23:49:46,136 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:49:46,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:49:46,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:49:46,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:46,221 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:46,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588968098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:46,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:46,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 23:49:46,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416439923] [2021-06-05 23:49:46,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 23:49:46,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:46,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 23:49:46,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:49:46,222 INFO L87 Difference]: Start difference. First operand 845 states and 2783 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:46,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:46,852 INFO L93 Difference]: Finished difference Result 2514 states and 7408 transitions. [2021-06-05 23:49:46,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 23:49:46,852 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 23:49:46,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:46,858 INFO L225 Difference]: With dead ends: 2514 [2021-06-05 23:49:46,858 INFO L226 Difference]: Without dead ends: 2514 [2021-06-05 23:49:46,859 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 370.2ms TimeCoverageRelationStatistics Valid=480, Invalid=1590, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 23:49:46,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-06-05 23:49:46,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 853. [2021-06-05 23:49:46,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.3039906103286385) internal successors, (2815), 852 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:46,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2815 transitions. [2021-06-05 23:49:46,888 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2815 transitions. Word has length 24 [2021-06-05 23:49:46,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:46,889 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2815 transitions. [2021-06-05 23:49:46,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:46,889 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2815 transitions. [2021-06-05 23:49:46,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:49:46,891 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:46,891 INFO L554 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] [2021-06-05 23:49:47,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-05 23:49:47,115 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:47,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:47,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1855884691, now seen corresponding path program 19 times [2021-06-05 23:49:47,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:47,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44014525] [2021-06-05 23:49:47,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:47,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:47,151 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:47,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:47,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44014525] [2021-06-05 23:49:47,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44014525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:47,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655395777] [2021-06-05 23:49:47,152 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 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 [2021-06-05 23:49:47,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:47,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:49:47,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:47,259 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:47,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655395777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:47,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:47,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 23:49:47,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122490629] [2021-06-05 23:49:47,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 23:49:47,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:47,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 23:49:47,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:49:47,261 INFO L87 Difference]: Start difference. First operand 853 states and 2815 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:47,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:47,871 INFO L93 Difference]: Finished difference Result 2332 states and 6984 transitions. [2021-06-05 23:49:47,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 23:49:47,871 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 23:49:47,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:47,877 INFO L225 Difference]: With dead ends: 2332 [2021-06-05 23:49:47,877 INFO L226 Difference]: Without dead ends: 2328 [2021-06-05 23:49:47,878 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 348.1ms TimeCoverageRelationStatistics Valid=460, Invalid=1432, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 23:49:47,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-06-05 23:49:47,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 853. [2021-06-05 23:49:47,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.301643192488263) internal successors, (2813), 852 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:47,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2813 transitions. [2021-06-05 23:49:47,929 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2813 transitions. Word has length 24 [2021-06-05 23:49:47,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:47,930 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2813 transitions. [2021-06-05 23:49:47,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:47,930 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2813 transitions. [2021-06-05 23:49:47,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:49:47,932 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:47,932 INFO L554 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] [2021-06-05 23:49:48,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 23:49:48,149 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:48,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:48,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1526797053, now seen corresponding path program 3 times [2021-06-05 23:49:48,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:48,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262177077] [2021-06-05 23:49:48,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:48,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:48,176 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:49:48,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:48,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262177077] [2021-06-05 23:49:48,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262177077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:48,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382604045] [2021-06-05 23:49:48,176 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 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 [2021-06-05 23:49:48,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 23:49:48,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:49:48,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 23:49:48,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:48,262 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:49:48,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382604045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:48,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:48,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 23:49:48,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711648325] [2021-06-05 23:49:48,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 23:49:48,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:48,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 23:49:48,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 23:49:48,264 INFO L87 Difference]: Start difference. First operand 853 states and 2813 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:48,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:48,342 INFO L93 Difference]: Finished difference Result 929 states and 3034 transitions. [2021-06-05 23:49:48,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 23:49:48,342 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have 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 [2021-06-05 23:49:48,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:48,344 INFO L225 Difference]: With dead ends: 929 [2021-06-05 23:49:48,344 INFO L226 Difference]: Without dead ends: 929 [2021-06-05 23:49:48,345 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 57.1ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:49:48,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-06-05 23:49:48,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 780. [2021-06-05 23:49:48,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 3.3029525032092426) internal successors, (2573), 779 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:48,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2573 transitions. [2021-06-05 23:49:48,360 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2573 transitions. Word has length 24 [2021-06-05 23:49:48,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:48,361 INFO L482 AbstractCegarLoop]: Abstraction has 780 states and 2573 transitions. [2021-06-05 23:49:48,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:48,361 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2573 transitions. [2021-06-05 23:49:48,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:49:48,362 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:48,363 INFO L554 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] [2021-06-05 23:49:48,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:49:48,581 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:48,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:48,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1837970499, now seen corresponding path program 20 times [2021-06-05 23:49:48,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:48,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525474608] [2021-06-05 23:49:48,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:48,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:48,628 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:48,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:48,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525474608] [2021-06-05 23:49:48,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525474608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:48,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964495505] [2021-06-05 23:49:48,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:49:48,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:49:48,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:49:48,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:49:48,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:48,719 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:48,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964495505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:48,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:48,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 23:49:48,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67918425] [2021-06-05 23:49:48,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 23:49:48,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:48,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 23:49:48,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 23:49:48,721 INFO L87 Difference]: Start difference. First operand 780 states and 2573 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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) [2021-06-05 23:49:49,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:49,017 INFO L93 Difference]: Finished difference Result 1555 states and 4761 transitions. [2021-06-05 23:49:49,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 23:49:49,018 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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 24 [2021-06-05 23:49:49,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:49,022 INFO L225 Difference]: With dead ends: 1555 [2021-06-05 23:49:49,022 INFO L226 Difference]: Without dead ends: 1555 [2021-06-05 23:49:49,023 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 174.8ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:49:49,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2021-06-05 23:49:49,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 842. [2021-06-05 23:49:49,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 3.296076099881094) internal successors, (2772), 841 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:49,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2772 transitions. [2021-06-05 23:49:49,047 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2772 transitions. Word has length 24 [2021-06-05 23:49:49,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:49,047 INFO L482 AbstractCegarLoop]: Abstraction has 842 states and 2772 transitions. [2021-06-05 23:49:49,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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) [2021-06-05 23:49:49,047 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2772 transitions. [2021-06-05 23:49:49,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:49:49,049 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:49,049 INFO L554 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] [2021-06-05 23:49:49,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-05 23:49:49,265 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:49,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:49,265 INFO L82 PathProgramCache]: Analyzing trace with hash 64708953, now seen corresponding path program 21 times [2021-06-05 23:49:49,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:49,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061738558] [2021-06-05 23:49:49,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:49,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:49,299 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:49,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:49,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061738558] [2021-06-05 23:49:49,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061738558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:49,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384175060] [2021-06-05 23:49:49,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:49:49,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:49:49,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:49:49,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:49:49,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:49,384 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:49,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384175060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:49,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:49,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 23:49:49,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366057628] [2021-06-05 23:49:49,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 23:49:49,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:49,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 23:49:49,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 23:49:49,388 INFO L87 Difference]: Start difference. First operand 842 states and 2772 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:49,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:49,638 INFO L93 Difference]: Finished difference Result 1605 states and 4891 transitions. [2021-06-05 23:49:49,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 23:49:49,639 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 23:49:49,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:49,650 INFO L225 Difference]: With dead ends: 1605 [2021-06-05 23:49:49,650 INFO L226 Difference]: Without dead ends: 1605 [2021-06-05 23:49:49,650 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 159.7ms TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:49:49,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-06-05 23:49:49,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 896. [2021-06-05 23:49:49,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.2905027932960893) internal successors, (2945), 895 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:49,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2945 transitions. [2021-06-05 23:49:49,670 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2945 transitions. Word has length 24 [2021-06-05 23:49:49,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:49,671 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2945 transitions. [2021-06-05 23:49:49,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:49,671 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2945 transitions. [2021-06-05 23:49:49,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:49:49,674 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:49,674 INFO L554 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] [2021-06-05 23:49:49,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:49:49,897 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:49,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:49,898 INFO L82 PathProgramCache]: Analyzing trace with hash 19887811, now seen corresponding path program 22 times [2021-06-05 23:49:49,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:49,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944533999] [2021-06-05 23:49:49,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:49,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:49,938 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:49:49,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:49,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944533999] [2021-06-05 23:49:49,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944533999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:49,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50414753] [2021-06-05 23:49:49,940 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:49:49,977 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:49:49,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:49:49,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:49:49,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:50,027 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:49:50,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50414753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:50,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:50,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 23:49:50,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889267072] [2021-06-05 23:49:50,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 23:49:50,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:50,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 23:49:50,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 23:49:50,028 INFO L87 Difference]: Start difference. First operand 896 states and 2945 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:50,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:50,212 INFO L93 Difference]: Finished difference Result 1524 states and 4690 transitions. [2021-06-05 23:49:50,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 23:49:50,217 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 23:49:50,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:50,220 INFO L225 Difference]: With dead ends: 1524 [2021-06-05 23:49:50,220 INFO L226 Difference]: Without dead ends: 1520 [2021-06-05 23:49:50,220 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 102.1ms TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:49:50,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-06-05 23:49:50,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 896. [2021-06-05 23:49:50,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.288268156424581) internal successors, (2943), 895 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:50,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2943 transitions. [2021-06-05 23:49:50,241 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2943 transitions. Word has length 24 [2021-06-05 23:49:50,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:50,241 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2943 transitions. [2021-06-05 23:49:50,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:50,241 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2943 transitions. [2021-06-05 23:49:50,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:49:50,243 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:50,243 INFO L554 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] [2021-06-05 23:49:50,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-06-05 23:49:50,457 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:50,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:50,457 INFO L82 PathProgramCache]: Analyzing trace with hash 617224469, now seen corresponding path program 23 times [2021-06-05 23:49:50,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:50,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605636313] [2021-06-05 23:49:50,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:50,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:50,492 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:50,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:50,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605636313] [2021-06-05 23:49:50,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605636313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:50,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861541646] [2021-06-05 23:49:50,493 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 23:49:50,521 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:49:50,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:49:50,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:49:50,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:50,579 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:50,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861541646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:50,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:50,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 23:49:50,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17650280] [2021-06-05 23:49:50,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 23:49:50,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:50,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 23:49:50,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 23:49:50,580 INFO L87 Difference]: Start difference. First operand 896 states and 2943 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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) [2021-06-05 23:49:50,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:50,792 INFO L93 Difference]: Finished difference Result 1508 states and 4652 transitions. [2021-06-05 23:49:50,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 23:49:50,792 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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 24 [2021-06-05 23:49:50,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:50,794 INFO L225 Difference]: With dead ends: 1508 [2021-06-05 23:49:50,795 INFO L226 Difference]: Without dead ends: 1496 [2021-06-05 23:49:50,795 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 123.1ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:49:50,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-06-05 23:49:50,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 904. [2021-06-05 23:49:50,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 3.276854928017719) internal successors, (2959), 903 states have internal predecessors, (2959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:50,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2959 transitions. [2021-06-05 23:49:50,815 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2959 transitions. Word has length 24 [2021-06-05 23:49:50,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:50,815 INFO L482 AbstractCegarLoop]: Abstraction has 904 states and 2959 transitions. [2021-06-05 23:49:50,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 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) [2021-06-05 23:49:50,815 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2959 transitions. [2021-06-05 23:49:50,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:49:50,817 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:50,817 INFO L554 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] [2021-06-05 23:49:51,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:49:51,037 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:51,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:51,037 INFO L82 PathProgramCache]: Analyzing trace with hash 90804185, now seen corresponding path program 24 times [2021-06-05 23:49:51,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:51,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004552300] [2021-06-05 23:49:51,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:51,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:51,080 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:51,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:51,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004552300] [2021-06-05 23:49:51,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004552300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:51,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626453556] [2021-06-05 23:49:51,080 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:49:51,104 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:49:51,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:49:51,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:49:51,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:51,188 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:51,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626453556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:51,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:51,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 23:49:51,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981381836] [2021-06-05 23:49:51,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 23:49:51,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:51,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 23:49:51,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:49:51,189 INFO L87 Difference]: Start difference. First operand 904 states and 2959 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-06-05 23:49:51,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:51,637 INFO L93 Difference]: Finished difference Result 2412 states and 7565 transitions. [2021-06-05 23:49:51,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 23:49:51,637 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 24 [2021-06-05 23:49:51,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:51,640 INFO L225 Difference]: With dead ends: 2412 [2021-06-05 23:49:51,640 INFO L226 Difference]: Without dead ends: 2412 [2021-06-05 23:49:51,641 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 302.2ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:49:51,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-06-05 23:49:51,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 960. [2021-06-05 23:49:51,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 3.367049009384776) internal successors, (3229), 959 states have internal predecessors, (3229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:51,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3229 transitions. [2021-06-05 23:49:51,687 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3229 transitions. Word has length 24 [2021-06-05 23:49:51,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:51,687 INFO L482 AbstractCegarLoop]: Abstraction has 960 states and 3229 transitions. [2021-06-05 23:49:51,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-06-05 23:49:51,687 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3229 transitions. [2021-06-05 23:49:51,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:49:51,689 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:51,689 INFO L554 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] [2021-06-05 23:49:51,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-06-05 23:49:51,891 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:51,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:51,891 INFO L82 PathProgramCache]: Analyzing trace with hash 657756265, now seen corresponding path program 25 times [2021-06-05 23:49:51,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:51,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518375201] [2021-06-05 23:49:51,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:51,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:51,930 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:51,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:51,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518375201] [2021-06-05 23:49:51,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518375201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:51,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073468144] [2021-06-05 23:49:51,931 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:49:51,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:51,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:49:51,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:52,043 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:52,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073468144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:52,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:52,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 23:49:52,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150264787] [2021-06-05 23:49:52,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 23:49:52,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:52,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 23:49:52,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:49:52,044 INFO L87 Difference]: Start difference. First operand 960 states and 3229 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-06-05 23:49:52,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:52,496 INFO L93 Difference]: Finished difference Result 2335 states and 7372 transitions. [2021-06-05 23:49:52,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 23:49:52,496 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 24 [2021-06-05 23:49:52,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:52,499 INFO L225 Difference]: With dead ends: 2335 [2021-06-05 23:49:52,499 INFO L226 Difference]: Without dead ends: 2335 [2021-06-05 23:49:52,500 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 305.2ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:49:52,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-06-05 23:49:52,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 957. [2021-06-05 23:49:52,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:52,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-06-05 23:49:52,524 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-06-05 23:49:52,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:52,525 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-06-05 23:49:52,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-06-05 23:49:52,525 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-06-05 23:49:52,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:49:52,527 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:52,527 INFO L554 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] [2021-06-05 23:49:52,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:49:52,749 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:52,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:52,749 INFO L82 PathProgramCache]: Analyzing trace with hash -514589593, now seen corresponding path program 26 times [2021-06-05 23:49:52,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:52,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851756055] [2021-06-05 23:49:52,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:52,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:52,794 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:52,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:52,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851756055] [2021-06-05 23:49:52,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851756055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:52,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020989730] [2021-06-05 23:49:52,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:49:52,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:49:52,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:49:52,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:49:52,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:52,883 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:52,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020989730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:52,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:52,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 23:49:52,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909525369] [2021-06-05 23:49:52,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 23:49:52,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:52,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 23:49:52,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:49:52,885 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:53,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:53,266 INFO L93 Difference]: Finished difference Result 2285 states and 7121 transitions. [2021-06-05 23:49:53,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 23:49:53,267 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 23:49:53,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:53,271 INFO L225 Difference]: With dead ends: 2285 [2021-06-05 23:49:53,271 INFO L226 Difference]: Without dead ends: 2285 [2021-06-05 23:49:53,271 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 253.6ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:49:53,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-06-05 23:49:53,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 963. [2021-06-05 23:49:53,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:53,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-06-05 23:49:53,309 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-06-05 23:49:53,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:53,310 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-06-05 23:49:53,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:53,310 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-06-05 23:49:53,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:49:53,312 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:53,312 INFO L554 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] [2021-06-05 23:49:53,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-06-05 23:49:53,525 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:53,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:53,525 INFO L82 PathProgramCache]: Analyzing trace with hash -433213505, now seen corresponding path program 27 times [2021-06-05 23:49:53,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:53,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139824392] [2021-06-05 23:49:53,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:53,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:53,555 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:53,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:53,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139824392] [2021-06-05 23:49:53,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139824392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:53,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957900932] [2021-06-05 23:49:53,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:49:53,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:49:53,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:49:53,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:49:53,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:53,642 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:53,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957900932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:53,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:53,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 23:49:53,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794091695] [2021-06-05 23:49:53,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 23:49:53,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:53,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 23:49:53,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:49:53,643 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:53,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:53,960 INFO L93 Difference]: Finished difference Result 2176 states and 6849 transitions. [2021-06-05 23:49:53,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 23:49:53,961 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 23:49:53,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:53,964 INFO L225 Difference]: With dead ends: 2176 [2021-06-05 23:49:53,964 INFO L226 Difference]: Without dead ends: 2172 [2021-06-05 23:49:53,964 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 202.2ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:49:53,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-06-05 23:49:53,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 957. [2021-06-05 23:49:53,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:53,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-06-05 23:49:53,983 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-06-05 23:49:53,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:53,983 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-06-05 23:49:53,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:53,983 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-06-05 23:49:53,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:49:53,985 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:53,985 INFO L554 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] [2021-06-05 23:49:54,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:49:54,186 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:54,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:54,186 INFO L82 PathProgramCache]: Analyzing trace with hash 497443711, now seen corresponding path program 28 times [2021-06-05 23:49:54,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:54,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064706355] [2021-06-05 23:49:54,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:54,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:54,228 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:54,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:54,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064706355] [2021-06-05 23:49:54,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064706355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:54,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469002996] [2021-06-05 23:49:54,228 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 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 [2021-06-05 23:49:54,251 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:49:54,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:49:54,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:49:54,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:54,354 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:54,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469002996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:54,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:54,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 23:49:54,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880348209] [2021-06-05 23:49:54,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 23:49:54,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:54,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 23:49:54,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:49:54,356 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:54,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:54,735 INFO L93 Difference]: Finished difference Result 2199 states and 6893 transitions. [2021-06-05 23:49:54,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 23:49:54,735 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 23:49:54,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:54,739 INFO L225 Difference]: With dead ends: 2199 [2021-06-05 23:49:54,739 INFO L226 Difference]: Without dead ends: 2199 [2021-06-05 23:49:54,739 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 240.4ms TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:49:54,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-06-05 23:49:54,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 963. [2021-06-05 23:49:54,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:54,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-06-05 23:49:54,756 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-06-05 23:49:54,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:54,756 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-06-05 23:49:54,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:54,757 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-06-05 23:49:54,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:49:54,758 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:54,758 INFO L554 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] [2021-06-05 23:49:54,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-05 23:49:54,959 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:54,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:54,959 INFO L82 PathProgramCache]: Analyzing trace with hash 2140482865, now seen corresponding path program 29 times [2021-06-05 23:49:54,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:54,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504459070] [2021-06-05 23:49:54,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:54,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:55,001 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:55,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:55,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504459070] [2021-06-05 23:49:55,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504459070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:55,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186493640] [2021-06-05 23:49:55,001 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 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 [2021-06-05 23:49:55,026 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:49:55,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:49:55,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:49:55,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:55,118 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:55,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186493640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:55,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:55,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 23:49:55,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230013731] [2021-06-05 23:49:55,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 23:49:55,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:55,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 23:49:55,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:49:55,119 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:55,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:55,457 INFO L93 Difference]: Finished difference Result 2156 states and 6791 transitions. [2021-06-05 23:49:55,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 23:49:55,458 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 23:49:55,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:55,460 INFO L225 Difference]: With dead ends: 2156 [2021-06-05 23:49:55,460 INFO L226 Difference]: Without dead ends: 2152 [2021-06-05 23:49:55,461 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 221.8ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:49:55,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2021-06-05 23:49:55,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 957. [2021-06-05 23:49:55,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:55,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-06-05 23:49:55,481 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-06-05 23:49:55,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:55,481 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-06-05 23:49:55,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:55,481 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-06-05 23:49:55,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:49:55,483 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:55,483 INFO L554 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] [2021-06-05 23:49:55,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-05 23:49:55,705 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:55,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:55,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1151056447, now seen corresponding path program 30 times [2021-06-05 23:49:55,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:55,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686656059] [2021-06-05 23:49:55,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:55,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:55,744 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:55,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:55,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686656059] [2021-06-05 23:49:55,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686656059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:55,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019572751] [2021-06-05 23:49:55,745 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 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 [2021-06-05 23:49:55,783 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:49:55,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:49:55,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:49:55,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:55,839 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:55,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019572751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:55,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:55,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 23:49:55,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306052358] [2021-06-05 23:49:55,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 23:49:55,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:55,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 23:49:55,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:49:55,841 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:56,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:56,188 INFO L93 Difference]: Finished difference Result 2097 states and 6377 transitions. [2021-06-05 23:49:56,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 23:49:56,189 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 23:49:56,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:56,191 INFO L225 Difference]: With dead ends: 2097 [2021-06-05 23:49:56,192 INFO L226 Difference]: Without dead ends: 2097 [2021-06-05 23:49:56,192 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 217.6ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:49:56,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-06-05 23:49:56,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1047. [2021-06-05 23:49:56,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.378585086042065) internal successors, (3534), 1046 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:56,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3534 transitions. [2021-06-05 23:49:56,211 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3534 transitions. Word has length 24 [2021-06-05 23:49:56,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:56,211 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3534 transitions. [2021-06-05 23:49:56,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:56,211 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3534 transitions. [2021-06-05 23:49:56,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:49:56,213 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:56,213 INFO L554 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] [2021-06-05 23:49:56,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-05 23:49:56,414 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:56,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:56,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1069680359, now seen corresponding path program 31 times [2021-06-05 23:49:56,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:56,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327027148] [2021-06-05 23:49:56,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:56,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:56,451 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:56,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:56,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327027148] [2021-06-05 23:49:56,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327027148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:56,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470667775] [2021-06-05 23:49:56,451 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 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 [2021-06-05 23:49:56,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:56,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:49:56,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:56,525 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:56,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470667775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:56,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:56,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 23:49:56,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609753498] [2021-06-05 23:49:56,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 23:49:56,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:56,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 23:49:56,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:49:56,526 INFO L87 Difference]: Start difference. First operand 1047 states and 3534 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:56,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:56,797 INFO L93 Difference]: Finished difference Result 1963 states and 6051 transitions. [2021-06-05 23:49:56,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 23:49:56,798 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 23:49:56,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:56,800 INFO L225 Difference]: With dead ends: 1963 [2021-06-05 23:49:56,800 INFO L226 Difference]: Without dead ends: 1959 [2021-06-05 23:49:56,801 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 159.7ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:49:56,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-06-05 23:49:56,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1047. [2021-06-05 23:49:56,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.376673040152964) internal successors, (3532), 1046 states have internal predecessors, (3532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:56,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3532 transitions. [2021-06-05 23:49:56,824 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3532 transitions. Word has length 24 [2021-06-05 23:49:56,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:56,824 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3532 transitions. [2021-06-05 23:49:56,824 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:56,824 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3532 transitions. [2021-06-05 23:49:56,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:49:56,827 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:56,827 INFO L554 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] [2021-06-05 23:49:57,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-05 23:49:57,041 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:57,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:57,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1710194965, now seen corresponding path program 32 times [2021-06-05 23:49:57,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:57,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144273882] [2021-06-05 23:49:57,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:57,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:57,075 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:57,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:57,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144273882] [2021-06-05 23:49:57,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144273882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:57,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597052351] [2021-06-05 23:49:57,075 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 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 [2021-06-05 23:49:57,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:49:57,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:49:57,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:49:57,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:57,162 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:57,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597052351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:57,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:57,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 23:49:57,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227184386] [2021-06-05 23:49:57,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 23:49:57,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:57,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 23:49:57,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:49:57,163 INFO L87 Difference]: Start difference. First operand 1047 states and 3532 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:57,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:57,358 INFO L93 Difference]: Finished difference Result 1728 states and 5494 transitions. [2021-06-05 23:49:57,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 23:49:57,359 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 23:49:57,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:57,361 INFO L225 Difference]: With dead ends: 1728 [2021-06-05 23:49:57,361 INFO L226 Difference]: Without dead ends: 1716 [2021-06-05 23:49:57,361 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 120.9ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:49:57,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2021-06-05 23:49:57,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1047. [2021-06-05 23:49:57,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.372848948374761) internal successors, (3528), 1046 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:57,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3528 transitions. [2021-06-05 23:49:57,376 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3528 transitions. Word has length 24 [2021-06-05 23:49:57,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:57,377 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3528 transitions. [2021-06-05 23:49:57,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:57,377 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3528 transitions. [2021-06-05 23:49:57,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:49:57,379 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:57,379 INFO L554 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] [2021-06-05 23:49:57,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:49:57,583 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:57,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:57,584 INFO L82 PathProgramCache]: Analyzing trace with hash -987645615, now seen corresponding path program 33 times [2021-06-05 23:49:57,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:57,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057920704] [2021-06-05 23:49:57,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:57,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:57,616 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:57,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:57,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057920704] [2021-06-05 23:49:57,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057920704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:57,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964327043] [2021-06-05 23:49:57,617 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 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 [2021-06-05 23:49:57,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:49:57,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:49:57,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:49:57,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:57,714 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:57,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964327043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:57,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:57,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 23:49:57,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135459746] [2021-06-05 23:49:57,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 23:49:57,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:57,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 23:49:57,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:49:57,716 INFO L87 Difference]: Start difference. First operand 1047 states and 3528 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:58,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:58,060 INFO L93 Difference]: Finished difference Result 1821 states and 5719 transitions. [2021-06-05 23:49:58,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 23:49:58,061 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 23:49:58,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:58,063 INFO L225 Difference]: With dead ends: 1821 [2021-06-05 23:49:58,063 INFO L226 Difference]: Without dead ends: 1821 [2021-06-05 23:49:58,063 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 220.3ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:49:58,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-06-05 23:49:58,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1119. [2021-06-05 23:49:58,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.370304114490161) internal successors, (3768), 1118 states have internal predecessors, (3768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:58,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3768 transitions. [2021-06-05 23:49:58,082 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3768 transitions. Word has length 24 [2021-06-05 23:49:58,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:58,082 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3768 transitions. [2021-06-05 23:49:58,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:58,082 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3768 transitions. [2021-06-05 23:49:58,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:49:58,084 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:58,084 INFO L554 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] [2021-06-05 23:49:58,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:49:58,301 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:58,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:58,301 INFO L82 PathProgramCache]: Analyzing trace with hash 655393539, now seen corresponding path program 34 times [2021-06-05 23:49:58,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:58,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633046724] [2021-06-05 23:49:58,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:58,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:58,341 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:58,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:58,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633046724] [2021-06-05 23:49:58,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633046724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:58,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100940469] [2021-06-05 23:49:58,342 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 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 [2021-06-05 23:49:58,365 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:49:58,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:49:58,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:49:58,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:58,446 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:58,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100940469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:58,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:58,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 23:49:58,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901826791] [2021-06-05 23:49:58,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 23:49:58,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:58,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 23:49:58,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:49:58,448 INFO L87 Difference]: Start difference. First operand 1119 states and 3768 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:58,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:58,705 INFO L93 Difference]: Finished difference Result 1790 states and 5648 transitions. [2021-06-05 23:49:58,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 23:49:58,706 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 23:49:58,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:58,708 INFO L225 Difference]: With dead ends: 1790 [2021-06-05 23:49:58,708 INFO L226 Difference]: Without dead ends: 1786 [2021-06-05 23:49:58,708 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 165.2ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:49:58,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-06-05 23:49:58,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1119. [2021-06-05 23:49:58,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.368515205724508) internal successors, (3766), 1118 states have internal predecessors, (3766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:58,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3766 transitions. [2021-06-05 23:49:58,725 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3766 transitions. Word has length 24 [2021-06-05 23:49:58,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:58,725 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3766 transitions. [2021-06-05 23:49:58,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:58,725 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3766 transitions. [2021-06-05 23:49:58,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:49:58,728 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:58,728 INFO L554 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] [2021-06-05 23:49:58,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-06-05 23:49:58,937 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:58,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:58,937 INFO L82 PathProgramCache]: Analyzing trace with hash -612063639, now seen corresponding path program 35 times [2021-06-05 23:49:58,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:58,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301412975] [2021-06-05 23:49:58,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:58,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:58,974 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:58,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:58,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301412975] [2021-06-05 23:49:58,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301412975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:58,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183649768] [2021-06-05 23:49:58,975 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 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 [2021-06-05 23:49:59,000 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:49:59,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:49:59,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:49:59,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:59,056 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:59,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183649768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:59,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:59,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 23:49:59,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075621337] [2021-06-05 23:49:59,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 23:49:59,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:59,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 23:49:59,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:49:59,057 INFO L87 Difference]: Start difference. First operand 1119 states and 3766 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:59,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:49:59,215 INFO L93 Difference]: Finished difference Result 1649 states and 5332 transitions. [2021-06-05 23:49:59,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 23:49:59,215 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 23:49:59,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:49:59,217 INFO L225 Difference]: With dead ends: 1649 [2021-06-05 23:49:59,217 INFO L226 Difference]: Without dead ends: 1637 [2021-06-05 23:49:59,217 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 96.3ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:49:59,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2021-06-05 23:49:59,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1119. [2021-06-05 23:49:59,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.3649373881932023) internal successors, (3762), 1118 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:59,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3762 transitions. [2021-06-05 23:49:59,233 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3762 transitions. Word has length 24 [2021-06-05 23:49:59,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:49:59,233 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3762 transitions. [2021-06-05 23:49:59,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:49:59,234 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3762 transitions. [2021-06-05 23:49:59,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:49:59,236 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:49:59,236 INFO L554 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] [2021-06-05 23:49:59,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:49:59,458 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:49:59,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:49:59,459 INFO L82 PathProgramCache]: Analyzing trace with hash 2003913975, now seen corresponding path program 4 times [2021-06-05 23:49:59,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:49:59,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873447845] [2021-06-05 23:49:59,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:49:59,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:49:59,695 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:59,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:49:59,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873447845] [2021-06-05 23:49:59,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873447845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:59,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998497380] [2021-06-05 23:49:59,696 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:49:59,724 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:49:59,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:49:59,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:49:59,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:49:59,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:49:59,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:49:59,899 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-06-05 23:49:59,901 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:49:59,907 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:59,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:49:59,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:49:59,910 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:49:59,912 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:49:59,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:59,925 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:59,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 23:49:59,929 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:49:59,936 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:49:59,940 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:49:59,941 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-05 23:49:59,958 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:49:59,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998497380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:49:59,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:49:59,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 23:49:59,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758774541] [2021-06-05 23:49:59,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 23:49:59,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:49:59,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 23:49:59,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:49:59,959 INFO L87 Difference]: Start difference. First operand 1119 states and 3762 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:00,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:50:00,444 INFO L93 Difference]: Finished difference Result 1517 states and 4955 transitions. [2021-06-05 23:50:00,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 23:50:00,444 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:50:00,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:50:00,447 INFO L225 Difference]: With dead ends: 1517 [2021-06-05 23:50:00,447 INFO L226 Difference]: Without dead ends: 1502 [2021-06-05 23:50:00,447 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 523.2ms TimeCoverageRelationStatistics Valid=139, Invalid=511, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:50:00,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2021-06-05 23:50:00,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1141. [2021-06-05 23:50:00,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1141 states, 1140 states have (on average 3.362280701754386) internal successors, (3833), 1140 states have internal predecessors, (3833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:00,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3833 transitions. [2021-06-05 23:50:00,461 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3833 transitions. Word has length 26 [2021-06-05 23:50:00,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:50:00,461 INFO L482 AbstractCegarLoop]: Abstraction has 1141 states and 3833 transitions. [2021-06-05 23:50:00,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:00,461 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3833 transitions. [2021-06-05 23:50:00,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:50:00,463 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:50:00,463 INFO L554 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] [2021-06-05 23:50:00,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:50:00,664 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:50:00,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:50:00,664 INFO L82 PathProgramCache]: Analyzing trace with hash -24484041, now seen corresponding path program 5 times [2021-06-05 23:50:00,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:50:00,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002412559] [2021-06-05 23:50:00,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:50:00,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:50:00,899 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:50:00,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:50:00,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002412559] [2021-06-05 23:50:00,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002412559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:00,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983752206] [2021-06-05 23:50:00,899 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:50:00,925 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:50:00,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:50:00,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:50:00,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:50:01,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:01,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:50:01,101 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-06-05 23:50:01,103 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:50:01,111 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:01,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:01,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:50:01,115 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:50:01,117 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:50:01,125 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:01,132 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:01,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 23:50:01,134 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:01,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:01,146 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:50:01,146 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-05 23:50:01,167 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:50:01,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983752206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:01,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:50:01,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 23:50:01,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631553760] [2021-06-05 23:50:01,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 23:50:01,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:50:01,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 23:50:01,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:50:01,169 INFO L87 Difference]: Start difference. First operand 1141 states and 3833 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:01,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:50:01,725 INFO L93 Difference]: Finished difference Result 1495 states and 4899 transitions. [2021-06-05 23:50:01,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 23:50:01,725 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:50:01,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:50:01,727 INFO L225 Difference]: With dead ends: 1495 [2021-06-05 23:50:01,727 INFO L226 Difference]: Without dead ends: 1480 [2021-06-05 23:50:01,728 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 557.5ms TimeCoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:50:01,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1480 states. [2021-06-05 23:50:01,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1480 to 1150. [2021-06-05 23:50:01,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1149 states have (on average 3.3568320278503045) internal successors, (3857), 1149 states have internal predecessors, (3857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:01,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 3857 transitions. [2021-06-05 23:50:01,743 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 3857 transitions. Word has length 26 [2021-06-05 23:50:01,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:50:01,743 INFO L482 AbstractCegarLoop]: Abstraction has 1150 states and 3857 transitions. [2021-06-05 23:50:01,743 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:01,743 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 3857 transitions. [2021-06-05 23:50:01,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:50:01,746 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:50:01,746 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:50:01,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:50:01,968 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:50:01,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:50:01,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1566945267, now seen corresponding path program 36 times [2021-06-05 23:50:01,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:50:01,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100998359] [2021-06-05 23:50:01,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:50:01,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:50:02,321 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:50:02,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:50:02,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100998359] [2021-06-05 23:50:02,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100998359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:02,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123440795] [2021-06-05 23:50:02,323 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 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 [2021-06-05 23:50:02,357 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:50:02,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:50:02,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:50:02,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:50:02,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:02,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:50:02,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:02,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:50:02,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-06-05 23:50:02,519 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:50:02,526 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:02,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:02,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:02,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:50:02,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:50:02,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 23:50:02,535 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:50:02,542 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:02,550 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:02,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 23:50:02,552 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:50:02,561 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:02,563 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:50:02,563 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-05 23:50:02,580 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:50:02,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123440795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:02,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:50:02,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-05 23:50:02,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244858589] [2021-06-05 23:50:02,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 23:50:02,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:50:02,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 23:50:02,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:50:02,582 INFO L87 Difference]: Start difference. First operand 1150 states and 3857 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:04,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:50:04,388 INFO L93 Difference]: Finished difference Result 1650 states and 5321 transitions. [2021-06-05 23:50:04,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 23:50:04,388 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:50:04,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:50:04,391 INFO L225 Difference]: With dead ends: 1650 [2021-06-05 23:50:04,391 INFO L226 Difference]: Without dead ends: 1635 [2021-06-05 23:50:04,391 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 1753.7ms TimeCoverageRelationStatistics Valid=311, Invalid=1495, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:50:04,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2021-06-05 23:50:04,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 1180. [2021-06-05 23:50:04,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1179 states have (on average 3.340966921119593) internal successors, (3939), 1179 states have internal predecessors, (3939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:04,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3939 transitions. [2021-06-05 23:50:04,406 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3939 transitions. Word has length 26 [2021-06-05 23:50:04,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:50:04,406 INFO L482 AbstractCegarLoop]: Abstraction has 1180 states and 3939 transitions. [2021-06-05 23:50:04,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:04,407 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3939 transitions. [2021-06-05 23:50:04,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:50:04,408 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:50:04,408 INFO L554 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] [2021-06-05 23:50:04,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-06-05 23:50:04,609 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:50:04,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:50:04,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1922974853, now seen corresponding path program 6 times [2021-06-05 23:50:04,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:50:04,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344378317] [2021-06-05 23:50:04,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:50:04,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:50:04,858 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:50:04,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:50:04,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344378317] [2021-06-05 23:50:04,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344378317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:04,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277863891] [2021-06-05 23:50:04,859 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 [2021-06-05 23:50:04,884 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:50:04,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:50:04,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:50:04,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:50:05,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:05,029 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:05,030 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 43 treesize of output 43 [2021-06-05 23:50:05,057 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:50:05,069 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:05,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:05,078 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:05,079 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 35 treesize of output 35 [2021-06-05 23:50:05,111 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:50:05,127 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:05,151 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:05,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-06-05 23:50:05,185 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 23:50:05,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:05,264 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:50:05,264 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:49, output treesize:15 [2021-06-05 23:50:05,309 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:50:05,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277863891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:05,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:50:05,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 23:50:05,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703455297] [2021-06-05 23:50:05,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:50:05,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:50:05,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:50:05,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:50:05,310 INFO L87 Difference]: Start difference. First operand 1180 states and 3939 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:06,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:50:06,970 INFO L93 Difference]: Finished difference Result 1879 states and 5975 transitions. [2021-06-05 23:50:06,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 23:50:06,970 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:50:06,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:50:06,974 INFO L225 Difference]: With dead ends: 1879 [2021-06-05 23:50:06,974 INFO L226 Difference]: Without dead ends: 1864 [2021-06-05 23:50:06,974 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 1312.9ms TimeCoverageRelationStatistics Valid=290, Invalid=1602, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 23:50:06,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1864 states. [2021-06-05 23:50:06,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1864 to 1198. [2021-06-05 23:50:06,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 3.346700083542189) internal successors, (4006), 1197 states have internal predecessors, (4006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:06,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 4006 transitions. [2021-06-05 23:50:06,999 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 4006 transitions. Word has length 26 [2021-06-05 23:50:06,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:50:06,999 INFO L482 AbstractCegarLoop]: Abstraction has 1198 states and 4006 transitions. [2021-06-05 23:50:06,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:07,000 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 4006 transitions. [2021-06-05 23:50:07,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:50:07,002 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:50:07,002 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:50:07,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:50:07,217 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:50:07,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:50:07,217 INFO L82 PathProgramCache]: Analyzing trace with hash -372593289, now seen corresponding path program 37 times [2021-06-05 23:50:07,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:50:07,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725012710] [2021-06-05 23:50:07,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:50:07,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:50:07,541 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:50:07,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:50:07,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725012710] [2021-06-05 23:50:07,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725012710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:07,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279421491] [2021-06-05 23:50:07,541 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:50:07,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:50:07,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:50:07,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:50:07,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:07,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:07,780 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:07,781 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 47 treesize of output 63 [2021-06-05 23:50:07,914 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 23:50:07,933 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:07,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:07,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:50:07,950 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:07,951 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 37 treesize of output 53 [2021-06-05 23:50:08,086 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 23:50:08,122 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:08,172 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:08,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 83 [2021-06-05 23:50:08,481 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 23:50:09,048 WARN L205 SmtUtils]: Spent 565.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 131 [2021-06-05 23:50:09,049 INFO L628 ElimStorePlain]: treesize reduction 164, result has 91.1 percent of original size [2021-06-05 23:50:09,526 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:50:09,526 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:58, output treesize:102 [2021-06-05 23:50:09,605 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:50:09,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279421491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:09,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:50:09,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 23:50:09,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683386046] [2021-06-05 23:50:09,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 23:50:09,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:50:09,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 23:50:09,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-05 23:50:09,606 INFO L87 Difference]: Start difference. First operand 1198 states and 4006 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:10,187 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2021-06-05 23:50:11,024 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2021-06-05 23:50:11,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:50:11,765 INFO L93 Difference]: Finished difference Result 1814 states and 5791 transitions. [2021-06-05 23:50:11,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 23:50:11,765 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:50:11,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:50:11,768 INFO L225 Difference]: With dead ends: 1814 [2021-06-05 23:50:11,768 INFO L226 Difference]: Without dead ends: 1799 [2021-06-05 23:50:11,768 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 2027.6ms TimeCoverageRelationStatistics Valid=360, Invalid=1710, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 23:50:11,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1799 states. [2021-06-05 23:50:11,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1799 to 1206. [2021-06-05 23:50:11,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1206 states, 1205 states have (on average 3.349377593360996) internal successors, (4036), 1205 states have internal predecessors, (4036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:11,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1206 states to 1206 states and 4036 transitions. [2021-06-05 23:50:11,786 INFO L78 Accepts]: Start accepts. Automaton has 1206 states and 4036 transitions. Word has length 26 [2021-06-05 23:50:11,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:50:11,787 INFO L482 AbstractCegarLoop]: Abstraction has 1206 states and 4036 transitions. [2021-06-05 23:50:11,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:50:11,787 INFO L276 IsEmpty]: Start isEmpty. Operand 1206 states and 4036 transitions. [2021-06-05 23:50:11,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:50:11,788 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:50:11,788 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:50:11,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:50:11,989 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:50:11,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:50:11,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1348912133, now seen corresponding path program 38 times [2021-06-05 23:50:11,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:50:11,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751768147] [2021-06-05 23:50:11,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:50:11,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:50:12,215 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:50:12,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:50:12,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751768147] [2021-06-05 23:50:12,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751768147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:12,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168092228] [2021-06-05 23:50:12,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:50:12,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:50:12,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:50:12,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:50:12,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:50:15,979 WARN L205 SmtUtils]: Spent 857.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-06-05 23:50:16,044 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:16,045 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 43 treesize of output 83 [2021-06-05 23:50:16,932 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 23:50:16,984 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:17,024 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:17,024 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 35 treesize of output 75 [2021-06-05 23:50:17,903 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 23:50:17,992 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:18,034 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:50:18,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 83 [2021-06-05 23:50:18,331 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 23:50:19,249 WARN L205 SmtUtils]: Spent 917.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 145 [2021-06-05 23:50:19,250 INFO L628 ElimStorePlain]: treesize reduction 536, result has 75.4 percent of original size [2021-06-05 23:50:20,172 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 137 [2021-06-05 23:50:20,415 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 247 DAG size of output: 227 [2021-06-05 23:50:20,980 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 194 [2021-06-05 23:50:21,090 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 194 [2021-06-05 23:50:21,204 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 209 [2021-06-05 23:50:21,373 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 190 [2021-06-05 23:50:22,157 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 205 [2021-06-05 23:50:22,329 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 205 [2021-06-05 23:50:22,559 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 213 [2021-06-05 23:50:23,383 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 153 [2021-06-05 23:50:23,523 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 241 DAG size of output: 211 [2021-06-05 23:50:23,670 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 241 DAG size of output: 211 [2021-06-05 23:50:23,829 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 221 [2021-06-05 23:50:24,228 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 296 [2021-06-05 23:50:25,110 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 307 DAG size of output: 263 [2021-06-05 23:50:25,218 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 307 DAG size of output: 263 [2021-06-05 23:50:25,323 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 237 [2021-06-05 23:50:26,053 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 213 [2021-06-05 23:50:26,890 WARN L205 SmtUtils]: Spent 566.00 ms on a formula simplification. DAG size of input: 525 DAG size of output: 469 [2021-06-05 23:50:27,353 WARN L205 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 525 DAG size of output: 469 [2021-06-05 23:50:27,963 WARN L205 SmtUtils]: Spent 604.00 ms on a formula simplification. DAG size of input: 558 DAG size of output: 502 [2021-06-05 23:50:28,129 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 318 [2021-06-05 23:50:28,592 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 196 [2021-06-05 23:50:29,024 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 295 [2021-06-05 23:50:29,794 WARN L205 SmtUtils]: Spent 672.00 ms on a formula simplification. DAG size of input: 506 DAG size of output: 447 [2021-06-05 23:50:30,434 WARN L205 SmtUtils]: Spent 637.00 ms on a formula simplification. DAG size of input: 506 DAG size of output: 447 [2021-06-05 23:50:31,966 WARN L205 SmtUtils]: Spent 1.53 s on a formula simplification. DAG size of input: 511 DAG size of output: 493 [2021-06-05 23:50:32,521 WARN L205 SmtUtils]: Spent 523.00 ms on a formula simplification. DAG size of input: 425 DAG size of output: 399 [2021-06-05 23:50:33,207 WARN L205 SmtUtils]: Spent 684.00 ms on a formula simplification. DAG size of input: 429 DAG size of output: 365 [2021-06-05 23:50:33,213 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:50:33,214 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:65, output treesize:14812 [2021-06-05 23:50:33,907 WARN L205 SmtUtils]: Spent 692.00 ms on a formula simplification. DAG size of input: 429 DAG size of output: 365 [2021-06-05 23:50:34,257 WARN L205 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 365 DAG size of output: 365 [2021-06-05 23:50:34,596 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 365 DAG size of output: 365 [2021-06-05 23:50:34,939 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 365 DAG size of output: 365 [2021-06-05 23:50:36,148 WARN L205 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 359 DAG size of output: 57 [2021-06-05 23:50:36,296 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:50:36,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168092228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:50:36,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:50:36,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 23:50:36,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161351952] [2021-06-05 23:50:36,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:50:36,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:50:36,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:50:36,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=429, Unknown=3, NotChecked=0, Total=506 [2021-06-05 23:50:36,297 INFO L87 Difference]: Start difference. First operand 1206 states and 4036 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 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) [2021-06-05 23:50:58,005 WARN L205 SmtUtils]: Spent 2.91 s on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2021-06-05 23:51:28,187 WARN L205 SmtUtils]: Spent 2.15 s on a formula simplification. DAG size of input: 109 DAG size of output: 59 [2021-06-05 23:51:32,252 WARN L205 SmtUtils]: Spent 3.13 s on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2021-06-05 23:51:41,352 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 59 [2021-06-05 23:51:43,468 WARN L205 SmtUtils]: Spent 1.06 s on a formula simplification that was a NOOP. DAG size: 48 [2021-06-05 23:51:54,630 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-06-05 23:51:55,946 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 38 [2021-06-05 23:51:56,103 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 44 [2021-06-05 23:51:57,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:51:57,201 INFO L93 Difference]: Finished difference Result 2289 states and 7148 transitions. [2021-06-05 23:51:57,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 23:51:57,201 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 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 26 [2021-06-05 23:51:57,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:51:57,204 INFO L225 Difference]: With dead ends: 2289 [2021-06-05 23:51:57,204 INFO L226 Difference]: Without dead ends: 2259 [2021-06-05 23:51:57,205 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 37182.0ms TimeCoverageRelationStatistics Valid=438, Invalid=2620, Unknown=22, NotChecked=0, Total=3080 [2021-06-05 23:51:57,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2259 states. [2021-06-05 23:51:57,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2259 to 1219. [2021-06-05 23:51:57,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1219 states, 1218 states have (on average 3.3505747126436782) internal successors, (4081), 1218 states have internal predecessors, (4081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:57,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1219 states to 1219 states and 4081 transitions. [2021-06-05 23:51:57,222 INFO L78 Accepts]: Start accepts. Automaton has 1219 states and 4081 transitions. Word has length 26 [2021-06-05 23:51:57,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:51:57,222 INFO L482 AbstractCegarLoop]: Abstraction has 1219 states and 4081 transitions. [2021-06-05 23:51:57,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 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) [2021-06-05 23:51:57,222 INFO L276 IsEmpty]: Start isEmpty. Operand 1219 states and 4081 transitions. [2021-06-05 23:51:57,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:51:57,224 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:51:57,224 INFO L554 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] [2021-06-05 23:51:57,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable248 [2021-06-05 23:51:57,425 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:51:57,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:51:57,425 INFO L82 PathProgramCache]: Analyzing trace with hash 860987935, now seen corresponding path program 7 times [2021-06-05 23:51:57,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:51:57,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055270049] [2021-06-05 23:51:57,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:51:57,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:51:57,650 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:51:57,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:51:57,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055270049] [2021-06-05 23:51:57,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055270049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:51:57,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333833159] [2021-06-05 23:51:57,651 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:51:57,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:51:57,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:51:57,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:51:57,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:51:57,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:51:57,880 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-06-05 23:51:57,882 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:51:57,888 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:57,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:51:57,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:51:57,892 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:51:57,894 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:51:57,902 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:57,908 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:57,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 23:51:57,910 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:51:57,918 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:57,920 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:51:57,920 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-05 23:51:57,933 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:51:57,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333833159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:51:57,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:51:57,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 23:51:57,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014264447] [2021-06-05 23:51:57,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 23:51:57,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:51:57,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 23:51:57,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:51:57,935 INFO L87 Difference]: Start difference. First operand 1219 states and 4081 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:58,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:51:58,592 INFO L93 Difference]: Finished difference Result 1622 states and 5290 transitions. [2021-06-05 23:51:58,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 23:51:58,593 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:51:58,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:51:58,595 INFO L225 Difference]: With dead ends: 1622 [2021-06-05 23:51:58,595 INFO L226 Difference]: Without dead ends: 1607 [2021-06-05 23:51:58,596 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 674.2ms TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:51:58,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1607 states. [2021-06-05 23:51:58,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1607 to 1230. [2021-06-05 23:51:58,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1230 states, 1229 states have (on average 3.3474369406021154) internal successors, (4114), 1229 states have internal predecessors, (4114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:58,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1230 states to 1230 states and 4114 transitions. [2021-06-05 23:51:58,614 INFO L78 Accepts]: Start accepts. Automaton has 1230 states and 4114 transitions. Word has length 26 [2021-06-05 23:51:58,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:51:58,614 INFO L482 AbstractCegarLoop]: Abstraction has 1230 states and 4114 transitions. [2021-06-05 23:51:58,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:51:58,615 INFO L276 IsEmpty]: Start isEmpty. Operand 1230 states and 4114 transitions. [2021-06-05 23:51:58,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:51:58,617 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:51:58,617 INFO L554 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] [2021-06-05 23:51:58,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1667,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:51:58,837 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:51:58,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:51:58,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1167410081, now seen corresponding path program 8 times [2021-06-05 23:51:58,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:51:58,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905337516] [2021-06-05 23:51:58,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:51:58,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:51:59,062 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:51:59,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:51:59,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905337516] [2021-06-05 23:51:59,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905337516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:51:59,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847045505] [2021-06-05 23:51:59,063 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:51:59,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:51:59,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:51:59,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:51:59,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:51:59,307 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:59,307 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 43 treesize of output 51 [2021-06-05 23:51:59,346 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:51:59,363 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:59,374 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:59,375 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 35 treesize of output 43 [2021-06-05 23:51:59,418 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:51:59,444 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:59,466 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:59,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-06-05 23:51:59,471 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 23:51:59,525 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:51:59,593 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:51:59,593 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:59, output treesize:102 [2021-06-05 23:51:59,665 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:51:59,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847045505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:51:59,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:51:59,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 23:51:59,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835917518] [2021-06-05 23:51:59,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:51:59,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:51:59,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:51:59,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:51:59,667 INFO L87 Difference]: Start difference. First operand 1230 states and 4114 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:00,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:52:00,693 INFO L93 Difference]: Finished difference Result 1684 states and 5459 transitions. [2021-06-05 23:52:00,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 23:52:00,693 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:52:00,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:52:00,696 INFO L225 Difference]: With dead ends: 1684 [2021-06-05 23:52:00,696 INFO L226 Difference]: Without dead ends: 1669 [2021-06-05 23:52:00,696 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 984.9ms TimeCoverageRelationStatistics Valid=194, Invalid=996, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:52:00,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1669 states. [2021-06-05 23:52:00,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1669 to 1233. [2021-06-05 23:52:00,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1233 states, 1232 states have (on average 3.3490259740259742) internal successors, (4126), 1232 states have internal predecessors, (4126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:00,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1233 states to 1233 states and 4126 transitions. [2021-06-05 23:52:00,711 INFO L78 Accepts]: Start accepts. Automaton has 1233 states and 4126 transitions. Word has length 26 [2021-06-05 23:52:00,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:52:00,711 INFO L482 AbstractCegarLoop]: Abstraction has 1233 states and 4126 transitions. [2021-06-05 23:52:00,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:00,712 INFO L276 IsEmpty]: Start isEmpty. Operand 1233 states and 4126 transitions. [2021-06-05 23:52:00,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:52:00,714 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:52:00,714 INFO L554 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] [2021-06-05 23:52:00,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1668 [2021-06-05 23:52:00,915 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:52:00,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:52:00,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1190147507, now seen corresponding path program 9 times [2021-06-05 23:52:00,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:52:00,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416627976] [2021-06-05 23:52:00,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:52:00,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:52:01,106 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:01,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:52:01,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416627976] [2021-06-05 23:52:01,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416627976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:01,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142045758] [2021-06-05 23:52:01,107 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:52:01,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:52:01,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:52:01,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:52:01,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:52:01,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:52:01,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:01,341 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-06-05 23:52:01,343 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:52:01,353 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:01,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:52:01,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:01,356 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:52:01,358 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:52:01,366 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:01,372 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:01,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 23:52:01,373 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:01,383 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:01,384 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:52:01,384 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:52, output treesize:3 [2021-06-05 23:52:01,398 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:01,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142045758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:01,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:52:01,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 23:52:01,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921602935] [2021-06-05 23:52:01,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 23:52:01,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:52:01,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 23:52:01,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:52:01,399 INFO L87 Difference]: Start difference. First operand 1233 states and 4126 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:04,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:52:04,781 INFO L93 Difference]: Finished difference Result 1868 states and 6059 transitions. [2021-06-05 23:52:04,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 23:52:04,781 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:52:04,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:52:04,784 INFO L225 Difference]: With dead ends: 1868 [2021-06-05 23:52:04,784 INFO L226 Difference]: Without dead ends: 1853 [2021-06-05 23:52:04,784 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 697.0ms TimeCoverageRelationStatistics Valid=200, Invalid=792, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:52:04,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1853 states. [2021-06-05 23:52:04,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1853 to 1242. [2021-06-05 23:52:04,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1242 states, 1241 states have (on average 3.353746978243352) internal successors, (4162), 1241 states have internal predecessors, (4162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:04,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1242 states to 1242 states and 4162 transitions. [2021-06-05 23:52:04,801 INFO L78 Accepts]: Start accepts. Automaton has 1242 states and 4162 transitions. Word has length 26 [2021-06-05 23:52:04,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:52:04,801 INFO L482 AbstractCegarLoop]: Abstraction has 1242 states and 4162 transitions. [2021-06-05 23:52:04,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:04,801 INFO L276 IsEmpty]: Start isEmpty. Operand 1242 states and 4162 transitions. [2021-06-05 23:52:04,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:52:04,803 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:52:04,803 INFO L554 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] [2021-06-05 23:52:05,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1728,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:52:05,003 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:52:05,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:52:05,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1022338415, now seen corresponding path program 10 times [2021-06-05 23:52:05,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:52:05,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013988556] [2021-06-05 23:52:05,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:52:05,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:52:05,207 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:05,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:52:05,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013988556] [2021-06-05 23:52:05,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013988556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:05,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594214210] [2021-06-05 23:52:05,208 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:52:05,246 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:52:05,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:52:05,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:52:05,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:52:05,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:05,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:52:05,388 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-06-05 23:52:05,390 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:52:05,399 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:05,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:05,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:52:05,402 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:52:05,404 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:52:05,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:05,418 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:05,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 23:52:05,420 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:05,428 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:05,429 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:52:05,429 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-05 23:52:05,447 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:05,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594214210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:05,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:52:05,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 23:52:05,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230717911] [2021-06-05 23:52:05,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 23:52:05,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:52:05,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 23:52:05,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 23:52:05,448 INFO L87 Difference]: Start difference. First operand 1242 states and 4162 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:05,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:52:05,861 INFO L93 Difference]: Finished difference Result 1549 states and 5097 transitions. [2021-06-05 23:52:05,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 23:52:05,861 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:52:05,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:52:05,863 INFO L225 Difference]: With dead ends: 1549 [2021-06-05 23:52:05,863 INFO L226 Difference]: Without dead ends: 1534 [2021-06-05 23:52:05,864 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 413.0ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:52:05,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1534 states. [2021-06-05 23:52:05,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1534 to 1238. [2021-06-05 23:52:05,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1238 states, 1237 states have (on average 3.3532740501212612) internal successors, (4148), 1237 states have internal predecessors, (4148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:05,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 4148 transitions. [2021-06-05 23:52:05,878 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 4148 transitions. Word has length 26 [2021-06-05 23:52:05,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:52:05,878 INFO L482 AbstractCegarLoop]: Abstraction has 1238 states and 4148 transitions. [2021-06-05 23:52:05,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:05,878 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 4148 transitions. [2021-06-05 23:52:05,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:52:05,880 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:52:05,880 INFO L554 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] [2021-06-05 23:52:06,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1729,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:52:06,081 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:52:06,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:52:06,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1045177613, now seen corresponding path program 11 times [2021-06-05 23:52:06,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:52:06,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296161133] [2021-06-05 23:52:06,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:52:06,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:52:06,245 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:06,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:52:06,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296161133] [2021-06-05 23:52:06,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296161133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:06,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959818608] [2021-06-05 23:52:06,245 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:52:06,270 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:52:06,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:52:06,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:52:06,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:52:06,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:06,397 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:06,397 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 43 treesize of output 43 [2021-06-05 23:52:06,414 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:52:06,426 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:06,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:06,434 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:06,434 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 35 treesize of output 35 [2021-06-05 23:52:06,453 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:52:06,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:06,487 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:06,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-06-05 23:52:06,492 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 23:52:06,535 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:06,547 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:52:06,547 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:54, output treesize:15 [2021-06-05 23:52:06,587 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:06,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959818608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:06,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:52:06,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 23:52:06,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335486693] [2021-06-05 23:52:06,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 23:52:06,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:52:06,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 23:52:06,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:52:06,588 INFO L87 Difference]: Start difference. First operand 1238 states and 4148 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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) [2021-06-05 23:52:07,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:52:07,645 INFO L93 Difference]: Finished difference Result 2068 states and 6699 transitions. [2021-06-05 23:52:07,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 23:52:07,645 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 [2021-06-05 23:52:07,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:52:07,648 INFO L225 Difference]: With dead ends: 2068 [2021-06-05 23:52:07,649 INFO L226 Difference]: Without dead ends: 2053 [2021-06-05 23:52:07,649 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 837.0ms TimeCoverageRelationStatistics Valid=312, Invalid=1094, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:52:07,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2053 states. [2021-06-05 23:52:07,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2053 to 1238. [2021-06-05 23:52:07,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1238 states, 1237 states have (on average 3.3532740501212612) internal successors, (4148), 1237 states have internal predecessors, (4148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:07,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 4148 transitions. [2021-06-05 23:52:07,667 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 4148 transitions. Word has length 26 [2021-06-05 23:52:07,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:52:07,667 INFO L482 AbstractCegarLoop]: Abstraction has 1238 states and 4148 transitions. [2021-06-05 23:52:07,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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) [2021-06-05 23:52:07,667 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 4148 transitions. [2021-06-05 23:52:07,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:52:07,670 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:52:07,670 INFO L554 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] [2021-06-05 23:52:07,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1730 [2021-06-05 23:52:07,870 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:52:07,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:52:07,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1541898973, now seen corresponding path program 12 times [2021-06-05 23:52:07,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:52:07,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835327662] [2021-06-05 23:52:07,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:52:07,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:52:08,119 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:08,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:52:08,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835327662] [2021-06-05 23:52:08,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835327662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:08,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89268939] [2021-06-05 23:52:08,120 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:52:08,147 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:52:08,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:52:08,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:52:08,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:52:08,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:08,279 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:08,280 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 43 treesize of output 43 [2021-06-05 23:52:08,302 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:52:08,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:08,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:08,320 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:08,320 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 35 treesize of output 35 [2021-06-05 23:52:08,360 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:52:08,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:08,392 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:08,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-06-05 23:52:08,397 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 23:52:08,437 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:08,449 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:52:08,449 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:49, output treesize:24 [2021-06-05 23:52:08,486 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:08,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89268939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:08,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:52:08,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 23:52:08,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956354427] [2021-06-05 23:52:08,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:52:08,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:52:08,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:52:08,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:52:08,488 INFO L87 Difference]: Start difference. First operand 1238 states and 4148 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:09,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:52:09,866 INFO L93 Difference]: Finished difference Result 1885 states and 6123 transitions. [2021-06-05 23:52:09,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 23:52:09,866 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:52:09,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:52:09,869 INFO L225 Difference]: With dead ends: 1885 [2021-06-05 23:52:09,869 INFO L226 Difference]: Without dead ends: 1870 [2021-06-05 23:52:09,870 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 1247.0ms TimeCoverageRelationStatistics Valid=312, Invalid=1410, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 23:52:09,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1870 states. [2021-06-05 23:52:09,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1870 to 1238. [2021-06-05 23:52:09,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1238 states, 1237 states have (on average 3.3532740501212612) internal successors, (4148), 1237 states have internal predecessors, (4148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:09,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 4148 transitions. [2021-06-05 23:52:09,888 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 4148 transitions. Word has length 26 [2021-06-05 23:52:09,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:52:09,888 INFO L482 AbstractCegarLoop]: Abstraction has 1238 states and 4148 transitions. [2021-06-05 23:52:09,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:09,888 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 4148 transitions. [2021-06-05 23:52:09,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:52:09,890 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:52:09,890 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:52:10,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1749,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:52:10,090 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:52:10,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:52:10,091 INFO L82 PathProgramCache]: Analyzing trace with hash -73165897, now seen corresponding path program 39 times [2021-06-05 23:52:10,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:52:10,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127989086] [2021-06-05 23:52:10,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:52:10,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:52:10,293 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:10,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:52:10,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127989086] [2021-06-05 23:52:10,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127989086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:10,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916130270] [2021-06-05 23:52:10,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:52:10,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:52:10,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:52:10,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:52:10,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:52:10,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:52:10,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:10,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:10,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:52:10,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-06-05 23:52:10,447 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:52:10,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:10,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:52:10,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:10,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:10,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:52:10,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 23:52:10,464 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:52:10,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:10,476 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:10,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 23:52:10,477 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:10,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:10,501 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:52:10,502 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-05 23:52:10,525 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:10,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916130270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:10,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:52:10,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 23:52:10,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450973102] [2021-06-05 23:52:10,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:52:10,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:52:10,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:52:10,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:52:10,526 INFO L87 Difference]: Start difference. First operand 1238 states and 4148 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:12,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:52:12,552 INFO L93 Difference]: Finished difference Result 2877 states and 8911 transitions. [2021-06-05 23:52:12,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 23:52:12,553 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:52:12,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:52:12,556 INFO L225 Difference]: With dead ends: 2877 [2021-06-05 23:52:12,557 INFO L226 Difference]: Without dead ends: 2832 [2021-06-05 23:52:12,557 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 845 ImplicationChecksByTransitivity, 1539.2ms TimeCoverageRelationStatistics Valid=545, Invalid=2535, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 23:52:12,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2832 states. [2021-06-05 23:52:12,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2832 to 1288. [2021-06-05 23:52:12,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1288 states, 1287 states have (on average 3.3737373737373737) internal successors, (4342), 1287 states have internal predecessors, (4342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:12,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 4342 transitions. [2021-06-05 23:52:12,578 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 4342 transitions. Word has length 26 [2021-06-05 23:52:12,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:52:12,578 INFO L482 AbstractCegarLoop]: Abstraction has 1288 states and 4342 transitions. [2021-06-05 23:52:12,578 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:12,578 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 4342 transitions. [2021-06-05 23:52:12,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:52:12,580 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:52:12,580 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:52:12,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1767 [2021-06-05 23:52:12,781 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:52:12,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:52:12,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1129146471, now seen corresponding path program 40 times [2021-06-05 23:52:12,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:52:12,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269830728] [2021-06-05 23:52:12,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:52:12,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:52:12,978 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:12,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:52:12,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269830728] [2021-06-05 23:52:12,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269830728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:12,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071978597] [2021-06-05 23:52:12,979 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:52:13,004 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:52:13,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:52:13,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:52:13,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:52:13,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:13,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:52:13,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:52:13,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-06-05 23:52:13,153 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:52:13,162 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:13,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:13,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:52:13,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:52:13,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 23:52:13,169 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:52:13,177 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:13,185 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:13,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 23:52:13,187 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:13,198 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:13,200 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:52:13,200 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-05 23:52:13,224 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:13,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071978597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:13,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:52:13,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 23:52:13,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759059495] [2021-06-05 23:52:13,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:52:13,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:52:13,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:52:13,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:52:13,225 INFO L87 Difference]: Start difference. First operand 1288 states and 4342 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:14,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:52:14,872 INFO L93 Difference]: Finished difference Result 2741 states and 8623 transitions. [2021-06-05 23:52:14,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 23:52:14,873 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:52:14,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:52:14,876 INFO L225 Difference]: With dead ends: 2741 [2021-06-05 23:52:14,876 INFO L226 Difference]: Without dead ends: 2696 [2021-06-05 23:52:14,877 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 1421.6ms TimeCoverageRelationStatistics Valid=485, Invalid=2065, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 23:52:14,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2696 states. [2021-06-05 23:52:14,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2696 to 1284. [2021-06-05 23:52:14,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1284 states, 1283 states have (on average 3.38269680436477) internal successors, (4340), 1283 states have internal predecessors, (4340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:14,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1284 states to 1284 states and 4340 transitions. [2021-06-05 23:52:14,896 INFO L78 Accepts]: Start accepts. Automaton has 1284 states and 4340 transitions. Word has length 26 [2021-06-05 23:52:14,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:52:14,896 INFO L482 AbstractCegarLoop]: Abstraction has 1284 states and 4340 transitions. [2021-06-05 23:52:14,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:14,896 INFO L276 IsEmpty]: Start isEmpty. Operand 1284 states and 4340 transitions. [2021-06-05 23:52:14,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:52:14,898 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:52:14,898 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:52:15,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1768,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:52:15,100 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:52:15,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:52:15,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1332172173, now seen corresponding path program 41 times [2021-06-05 23:52:15,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:52:15,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146855198] [2021-06-05 23:52:15,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:52:15,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:52:15,308 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:15,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:52:15,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146855198] [2021-06-05 23:52:15,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146855198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:15,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026119392] [2021-06-05 23:52:15,308 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:52:15,334 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:52:15,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:52:15,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:52:15,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:52:15,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:15,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:15,445 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:15,446 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 47 treesize of output 65 [2021-06-05 23:52:15,556 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 23:52:15,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:15,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:15,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:15,599 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:15,599 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 37 treesize of output 55 [2021-06-05 23:52:15,693 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 23:52:15,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:15,766 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:15,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 83 [2021-06-05 23:52:15,950 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 23:52:16,456 WARN L205 SmtUtils]: Spent 505.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 132 [2021-06-05 23:52:16,457 INFO L628 ElimStorePlain]: treesize reduction 198, result has 89.8 percent of original size [2021-06-05 23:52:16,794 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:52:16,794 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:56, output treesize:38 [2021-06-05 23:52:16,834 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:16,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026119392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:16,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:52:16,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 23:52:16,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721217757] [2021-06-05 23:52:16,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:52:16,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:52:16,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:52:16,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:52:16,835 INFO L87 Difference]: Start difference. First operand 1284 states and 4340 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:18,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:52:18,903 INFO L93 Difference]: Finished difference Result 3022 states and 9448 transitions. [2021-06-05 23:52:18,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 23:52:18,904 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:52:18,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:52:18,908 INFO L225 Difference]: With dead ends: 3022 [2021-06-05 23:52:18,908 INFO L226 Difference]: Without dead ends: 2977 [2021-06-05 23:52:18,908 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 1755.1ms TimeCoverageRelationStatistics Valid=567, Invalid=2295, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 23:52:18,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2977 states. [2021-06-05 23:52:18,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2977 to 1288. [2021-06-05 23:52:18,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1288 states, 1287 states have (on average 3.3885003885003884) internal successors, (4361), 1287 states have internal predecessors, (4361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:18,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 4361 transitions. [2021-06-05 23:52:18,930 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 4361 transitions. Word has length 26 [2021-06-05 23:52:18,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:52:18,930 INFO L482 AbstractCegarLoop]: Abstraction has 1288 states and 4361 transitions. [2021-06-05 23:52:18,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:18,931 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 4361 transitions. [2021-06-05 23:52:18,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:52:18,932 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:52:18,932 INFO L554 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] [2021-06-05 23:52:19,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1769 [2021-06-05 23:52:19,133 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:52:19,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:52:19,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1119783259, now seen corresponding path program 13 times [2021-06-05 23:52:19,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:52:19,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268657524] [2021-06-05 23:52:19,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:52:19,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:52:19,324 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:19,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:52:19,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268657524] [2021-06-05 23:52:19,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268657524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:19,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468077499] [2021-06-05 23:52:19,325 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:52:19,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:52:19,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:52:19,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:52:19,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:19,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:52:19,505 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-06-05 23:52:19,506 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:52:19,513 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:19,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:19,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:52:19,515 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:52:19,517 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:52:19,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:19,530 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:19,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 23:52:19,531 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:19,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:19,540 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:52:19,540 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-05 23:52:19,554 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:19,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468077499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:19,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:52:19,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 23:52:19,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444842220] [2021-06-05 23:52:19,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 23:52:19,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:52:19,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 23:52:19,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:52:19,555 INFO L87 Difference]: Start difference. First operand 1288 states and 4361 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:19,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:52:19,957 INFO L93 Difference]: Finished difference Result 1650 states and 5461 transitions. [2021-06-05 23:52:19,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 23:52:19,957 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:52:19,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:52:19,960 INFO L225 Difference]: With dead ends: 1650 [2021-06-05 23:52:19,960 INFO L226 Difference]: Without dead ends: 1635 [2021-06-05 23:52:19,960 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 501.6ms TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:52:19,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2021-06-05 23:52:19,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 1297. [2021-06-05 23:52:19,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1297 states, 1296 states have (on average 3.388117283950617) internal successors, (4391), 1296 states have internal predecessors, (4391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:19,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1297 states to 1297 states and 4391 transitions. [2021-06-05 23:52:19,978 INFO L78 Accepts]: Start accepts. Automaton has 1297 states and 4391 transitions. Word has length 26 [2021-06-05 23:52:19,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:52:19,978 INFO L482 AbstractCegarLoop]: Abstraction has 1297 states and 4391 transitions. [2021-06-05 23:52:19,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:19,978 INFO L276 IsEmpty]: Start isEmpty. Operand 1297 states and 4391 transitions. [2021-06-05 23:52:19,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:52:19,980 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:52:19,980 INFO L554 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] [2021-06-05 23:52:20,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1893 [2021-06-05 23:52:20,180 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:52:20,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:52:20,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1448942831, now seen corresponding path program 14 times [2021-06-05 23:52:20,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:52:20,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917285868] [2021-06-05 23:52:20,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:52:20,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:52:20,356 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:20,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:52:20,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917285868] [2021-06-05 23:52:20,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917285868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:20,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498212727] [2021-06-05 23:52:20,357 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:52:20,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:52:20,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:52:20,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:52:20,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:52:20,537 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:20,537 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 43 treesize of output 51 [2021-06-05 23:52:20,582 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:52:20,599 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:20,610 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:20,610 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 35 treesize of output 43 [2021-06-05 23:52:20,645 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:52:20,669 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:20,689 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:20,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-06-05 23:52:20,694 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 23:52:20,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:20,801 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:52:20,801 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:59, output treesize:75 [2021-06-05 23:52:20,890 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:20,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498212727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:20,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:52:20,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 23:52:20,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535458314] [2021-06-05 23:52:20,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:52:20,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:52:20,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:52:20,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:52:20,892 INFO L87 Difference]: Start difference. First operand 1297 states and 4391 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:22,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:52:22,030 INFO L93 Difference]: Finished difference Result 2002 states and 6515 transitions. [2021-06-05 23:52:22,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 23:52:22,030 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:52:22,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:52:22,033 INFO L225 Difference]: With dead ends: 2002 [2021-06-05 23:52:22,033 INFO L226 Difference]: Without dead ends: 1987 [2021-06-05 23:52:22,033 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 917.5ms TimeCoverageRelationStatistics Valid=198, Invalid=1208, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:52:22,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1987 states. [2021-06-05 23:52:22,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1987 to 1289. [2021-06-05 23:52:22,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1289 states, 1288 states have (on average 3.3975155279503104) internal successors, (4376), 1288 states have internal predecessors, (4376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:22,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1289 states to 1289 states and 4376 transitions. [2021-06-05 23:52:22,050 INFO L78 Accepts]: Start accepts. Automaton has 1289 states and 4376 transitions. Word has length 26 [2021-06-05 23:52:22,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:52:22,050 INFO L482 AbstractCegarLoop]: Abstraction has 1289 states and 4376 transitions. [2021-06-05 23:52:22,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:22,050 INFO L276 IsEmpty]: Start isEmpty. Operand 1289 states and 4376 transitions. [2021-06-05 23:52:22,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:52:22,052 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:52:22,052 INFO L554 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] [2021-06-05 23:52:22,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1894,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:52:22,254 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:52:22,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:52:22,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1281133739, now seen corresponding path program 15 times [2021-06-05 23:52:22,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:52:22,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803153696] [2021-06-05 23:52:22,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:52:22,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:52:22,489 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:22,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:52:22,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803153696] [2021-06-05 23:52:22,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803153696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:22,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381586487] [2021-06-05 23:52:22,490 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:52:22,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:52:22,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:52:22,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:52:22,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:52:22,715 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:22,715 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 43 treesize of output 59 [2021-06-05 23:52:22,779 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:52:22,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:22,816 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:22,816 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 35 treesize of output 51 [2021-06-05 23:52:22,899 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:52:22,935 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:22,957 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:22,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-06-05 23:52:22,962 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 23:52:23,026 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:23,213 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 16 xjuncts. [2021-06-05 23:52:23,213 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:59, output treesize:617 [2021-06-05 23:52:23,558 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 53 [2021-06-05 23:52:23,703 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:23,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381586487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:23,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:52:23,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2021-06-05 23:52:23,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212656765] [2021-06-05 23:52:23,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 23:52:23,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:52:23,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 23:52:23,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:52:23,704 INFO L87 Difference]: Start difference. First operand 1289 states and 4376 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:26,861 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2021-06-05 23:52:30,342 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 69 [2021-06-05 23:52:32,868 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 31 [2021-06-05 23:52:33,732 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 44 [2021-06-05 23:52:33,894 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 59 [2021-06-05 23:52:33,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:52:33,959 INFO L93 Difference]: Finished difference Result 1952 states and 6311 transitions. [2021-06-05 23:52:33,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 23:52:33,959 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:52:33,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:52:33,962 INFO L225 Difference]: With dead ends: 1952 [2021-06-05 23:52:33,962 INFO L226 Difference]: Without dead ends: 1937 [2021-06-05 23:52:33,963 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 8722.2ms TimeCoverageRelationStatistics Valid=313, Invalid=1755, Unknown=2, NotChecked=0, Total=2070 [2021-06-05 23:52:33,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1937 states. [2021-06-05 23:52:33,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1937 to 1302. [2021-06-05 23:52:33,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1302 states, 1301 states have (on average 3.4027671022290544) internal successors, (4427), 1301 states have internal predecessors, (4427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:33,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 4427 transitions. [2021-06-05 23:52:33,986 INFO L78 Accepts]: Start accepts. Automaton has 1302 states and 4427 transitions. Word has length 26 [2021-06-05 23:52:33,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:52:33,987 INFO L482 AbstractCegarLoop]: Abstraction has 1302 states and 4427 transitions. [2021-06-05 23:52:33,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:33,987 INFO L276 IsEmpty]: Start isEmpty. Operand 1302 states and 4427 transitions. [2021-06-05 23:52:33,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:52:33,989 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:52:33,989 INFO L554 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] [2021-06-05 23:52:34,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1950 [2021-06-05 23:52:34,212 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:52:34,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:52:34,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1261165713, now seen corresponding path program 16 times [2021-06-05 23:52:34,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:52:34,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953425379] [2021-06-05 23:52:34,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:52:34,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:52:34,429 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:34,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:52:34,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953425379] [2021-06-05 23:52:34,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953425379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:34,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119844072] [2021-06-05 23:52:34,429 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:52:34,456 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:52:34,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:52:34,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:52:34,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:52:34,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:34,568 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:34,569 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 43 treesize of output 43 [2021-06-05 23:52:34,587 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:52:34,600 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:34,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:34,608 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:34,608 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 35 treesize of output 35 [2021-06-05 23:52:34,625 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:52:34,642 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:34,660 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:34,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-06-05 23:52:34,670 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 23:52:34,718 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:34,732 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:52:34,733 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:55, output treesize:17 [2021-06-05 23:52:34,777 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:34,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119844072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:34,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:52:34,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 23:52:34,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379941000] [2021-06-05 23:52:34,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 23:52:34,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:52:34,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 23:52:34,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 23:52:34,778 INFO L87 Difference]: Start difference. First operand 1302 states and 4427 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:35,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:52:35,168 INFO L93 Difference]: Finished difference Result 1783 states and 5883 transitions. [2021-06-05 23:52:35,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 23:52:35,169 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:52:35,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:52:35,171 INFO L225 Difference]: With dead ends: 1783 [2021-06-05 23:52:35,171 INFO L226 Difference]: Without dead ends: 1768 [2021-06-05 23:52:35,171 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 403.9ms TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:52:35,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1768 states. [2021-06-05 23:52:35,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1768 to 1298. [2021-06-05 23:52:35,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1298 states, 1297 states have (on average 3.397070161912105) internal successors, (4406), 1297 states have internal predecessors, (4406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:35,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1298 states to 1298 states and 4406 transitions. [2021-06-05 23:52:35,186 INFO L78 Accepts]: Start accepts. Automaton has 1298 states and 4406 transitions. Word has length 26 [2021-06-05 23:52:35,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:52:35,186 INFO L482 AbstractCegarLoop]: Abstraction has 1298 states and 4406 transitions. [2021-06-05 23:52:35,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:35,186 INFO L276 IsEmpty]: Start isEmpty. Operand 1298 states and 4406 transitions. [2021-06-05 23:52:35,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:52:35,188 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:52:35,188 INFO L554 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] [2021-06-05 23:52:35,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2048,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:52:35,388 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:52:35,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:52:35,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1283103649, now seen corresponding path program 17 times [2021-06-05 23:52:35,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:52:35,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800258665] [2021-06-05 23:52:35,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:52:35,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:52:35,581 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:35,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:52:35,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800258665] [2021-06-05 23:52:35,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800258665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:35,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235888933] [2021-06-05 23:52:35,582 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:52:35,606 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:52:35,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:52:35,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:52:35,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:52:35,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:35,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:52:35,787 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-06-05 23:52:35,789 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:52:35,796 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:35,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:35,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:52:35,798 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:52:35,800 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:52:35,806 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:35,812 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:35,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 23:52:35,814 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:35,822 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:35,823 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:52:35,823 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-05 23:52:35,841 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:35,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235888933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:35,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:52:35,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 23:52:35,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831955533] [2021-06-05 23:52:35,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 23:52:35,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:52:35,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 23:52:35,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:52:35,842 INFO L87 Difference]: Start difference. First operand 1298 states and 4406 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:36,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:52:36,886 INFO L93 Difference]: Finished difference Result 1768 states and 5860 transitions. [2021-06-05 23:52:36,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 23:52:36,886 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:52:36,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:52:36,889 INFO L225 Difference]: With dead ends: 1768 [2021-06-05 23:52:36,889 INFO L226 Difference]: Without dead ends: 1753 [2021-06-05 23:52:36,889 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 875.3ms TimeCoverageRelationStatistics Valid=214, Invalid=1046, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:52:36,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1753 states. [2021-06-05 23:52:36,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1753 to 1301. [2021-06-05 23:52:36,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1301 states, 1300 states have (on average 3.3984615384615386) internal successors, (4418), 1300 states have internal predecessors, (4418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:36,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1301 states to 1301 states and 4418 transitions. [2021-06-05 23:52:36,906 INFO L78 Accepts]: Start accepts. Automaton has 1301 states and 4418 transitions. Word has length 26 [2021-06-05 23:52:36,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:52:36,906 INFO L482 AbstractCegarLoop]: Abstraction has 1301 states and 4418 transitions. [2021-06-05 23:52:36,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:36,907 INFO L276 IsEmpty]: Start isEmpty. Operand 1301 states and 4418 transitions. [2021-06-05 23:52:36,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:52:36,908 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:52:36,908 INFO L554 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] [2021-06-05 23:52:37,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2067 [2021-06-05 23:52:37,109 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:52:37,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:52:37,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1394330867, now seen corresponding path program 18 times [2021-06-05 23:52:37,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:52:37,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614085633] [2021-06-05 23:52:37,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:52:37,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:52:37,333 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:37,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:52:37,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614085633] [2021-06-05 23:52:37,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614085633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:37,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824746012] [2021-06-05 23:52:37,333 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:52:37,365 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:52:37,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:52:37,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:52:37,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:52:37,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:37,498 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:37,498 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 43 treesize of output 43 [2021-06-05 23:52:37,515 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:52:37,527 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:37,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:37,534 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:37,534 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 35 treesize of output 35 [2021-06-05 23:52:37,551 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:52:37,566 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:37,585 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:37,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-06-05 23:52:37,590 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 23:52:37,633 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:37,646 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:52:37,646 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:54, output treesize:36 [2021-06-05 23:52:37,684 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:37,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824746012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:37,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:52:37,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 23:52:37,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206250057] [2021-06-05 23:52:37,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 23:52:37,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:52:37,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 23:52:37,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:52:37,685 INFO L87 Difference]: Start difference. First operand 1301 states and 4418 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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) [2021-06-05 23:52:38,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:52:38,554 INFO L93 Difference]: Finished difference Result 2171 states and 7095 transitions. [2021-06-05 23:52:38,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 23:52:38,555 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 [2021-06-05 23:52:38,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:52:38,558 INFO L225 Difference]: With dead ends: 2171 [2021-06-05 23:52:38,558 INFO L226 Difference]: Without dead ends: 2156 [2021-06-05 23:52:38,558 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 790.4ms TimeCoverageRelationStatistics Valid=261, Invalid=999, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:52:38,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2156 states. [2021-06-05 23:52:38,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2156 to 1295. [2021-06-05 23:52:38,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1295 states, 1294 states have (on average 3.3956723338485317) internal successors, (4394), 1294 states have internal predecessors, (4394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:38,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1295 states to 1295 states and 4394 transitions. [2021-06-05 23:52:38,580 INFO L78 Accepts]: Start accepts. Automaton has 1295 states and 4394 transitions. Word has length 26 [2021-06-05 23:52:38,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:52:38,580 INFO L482 AbstractCegarLoop]: Abstraction has 1295 states and 4394 transitions. [2021-06-05 23:52:38,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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) [2021-06-05 23:52:38,580 INFO L276 IsEmpty]: Start isEmpty. Operand 1295 states and 4394 transitions. [2021-06-05 23:52:38,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:52:38,582 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:52:38,583 INFO L554 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] [2021-06-05 23:52:38,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2068 [2021-06-05 23:52:38,801 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:52:38,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:52:38,801 INFO L82 PathProgramCache]: Analyzing trace with hash 911449975, now seen corresponding path program 19 times [2021-06-05 23:52:38,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:52:38,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142684405] [2021-06-05 23:52:38,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:52:38,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:52:39,035 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:39,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:52:39,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142684405] [2021-06-05 23:52:39,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142684405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:39,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114395362] [2021-06-05 23:52:39,036 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:52:39,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:52:39,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:52:39,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:52:39,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:39,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:52:39,252 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-06-05 23:52:39,254 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:52:39,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:39,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:39,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:52:39,265 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:52:39,267 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:52:39,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:39,281 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:39,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 23:52:39,282 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:39,291 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:39,293 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:52:39,293 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-05 23:52:39,309 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:39,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114395362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:39,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:52:39,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 23:52:39,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089893038] [2021-06-05 23:52:39,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 23:52:39,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:52:39,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 23:52:39,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:52:39,310 INFO L87 Difference]: Start difference. First operand 1295 states and 4394 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:39,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:52:39,836 INFO L93 Difference]: Finished difference Result 1728 states and 5699 transitions. [2021-06-05 23:52:39,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 23:52:39,837 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:52:39,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:52:39,840 INFO L225 Difference]: With dead ends: 1728 [2021-06-05 23:52:39,840 INFO L226 Difference]: Without dead ends: 1707 [2021-06-05 23:52:39,840 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 561.4ms TimeCoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:52:39,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707 states. [2021-06-05 23:52:39,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 1336. [2021-06-05 23:52:39,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1336 states, 1335 states have (on average 3.390262172284644) internal successors, (4526), 1335 states have internal predecessors, (4526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:39,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1336 states to 1336 states and 4526 transitions. [2021-06-05 23:52:39,864 INFO L78 Accepts]: Start accepts. Automaton has 1336 states and 4526 transitions. Word has length 26 [2021-06-05 23:52:39,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:52:39,864 INFO L482 AbstractCegarLoop]: Abstraction has 1336 states and 4526 transitions. [2021-06-05 23:52:39,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:39,864 INFO L276 IsEmpty]: Start isEmpty. Operand 1336 states and 4526 transitions. [2021-06-05 23:52:39,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:52:39,867 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:52:39,867 INFO L554 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] [2021-06-05 23:52:40,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2087,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:52:40,091 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:52:40,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:52:40,092 INFO L82 PathProgramCache]: Analyzing trace with hash 743640883, now seen corresponding path program 20 times [2021-06-05 23:52:40,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:52:40,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413973160] [2021-06-05 23:52:40,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:52:40,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:52:40,312 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:40,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:52:40,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413973160] [2021-06-05 23:52:40,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413973160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:40,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804956267] [2021-06-05 23:52:40,312 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:52:40,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:52:40,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:52:40,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 23:52:40,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:52:40,486 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:40,487 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 43 treesize of output 51 [2021-06-05 23:52:40,522 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:52:40,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:40,551 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:40,551 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 35 treesize of output 43 [2021-06-05 23:52:40,589 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:52:40,615 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:40,635 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:40,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-06-05 23:52:40,639 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 23:52:40,695 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:40,760 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:52:40,760 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:57, output treesize:184 [2021-06-05 23:52:40,882 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:40,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804956267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:40,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:52:40,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2021-06-05 23:52:40,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934908946] [2021-06-05 23:52:40,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 23:52:40,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:52:40,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 23:52:40,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:52:40,883 INFO L87 Difference]: Start difference. First operand 1336 states and 4526 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:42,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:52:42,086 INFO L93 Difference]: Finished difference Result 1950 states and 6250 transitions. [2021-06-05 23:52:42,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 23:52:42,086 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:52:42,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:52:42,089 INFO L225 Difference]: With dead ends: 1950 [2021-06-05 23:52:42,089 INFO L226 Difference]: Without dead ends: 1925 [2021-06-05 23:52:42,089 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1142.6ms TimeCoverageRelationStatistics Valid=226, Invalid=1256, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:52:42,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1925 states. [2021-06-05 23:52:42,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1925 to 1350. [2021-06-05 23:52:42,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1350 states, 1349 states have (on average 3.3995552260934025) internal successors, (4586), 1349 states have internal predecessors, (4586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:42,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1350 states to 1350 states and 4586 transitions. [2021-06-05 23:52:42,109 INFO L78 Accepts]: Start accepts. Automaton has 1350 states and 4586 transitions. Word has length 26 [2021-06-05 23:52:42,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:52:42,109 INFO L482 AbstractCegarLoop]: Abstraction has 1350 states and 4586 transitions. [2021-06-05 23:52:42,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:42,109 INFO L276 IsEmpty]: Start isEmpty. Operand 1350 states and 4586 transitions. [2021-06-05 23:52:42,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:52:42,111 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:52:42,111 INFO L554 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] [2021-06-05 23:52:42,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2088,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:52:42,312 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:52:42,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:52:42,312 INFO L82 PathProgramCache]: Analyzing trace with hash 723672857, now seen corresponding path program 21 times [2021-06-05 23:52:42,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:52:42,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131628193] [2021-06-05 23:52:42,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:52:42,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:52:42,560 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:42,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:52:42,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131628193] [2021-06-05 23:52:42,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131628193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:42,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425624730] [2021-06-05 23:52:42,561 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:52:42,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:52:42,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:52:42,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:52:42,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:52:42,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:42,821 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:42,821 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 43 treesize of output 43 [2021-06-05 23:52:42,844 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:52:42,858 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:42,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:42,866 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:42,866 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 35 treesize of output 35 [2021-06-05 23:52:42,883 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:52:42,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:42,918 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:42,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-06-05 23:52:42,923 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 23:52:42,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:42,980 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:52:42,980 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:52, output treesize:19 [2021-06-05 23:52:43,022 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:43,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425624730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:43,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:52:43,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 23:52:43,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136901591] [2021-06-05 23:52:43,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:52:43,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:52:43,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:52:43,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:52:43,023 INFO L87 Difference]: Start difference. First operand 1350 states and 4586 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:43,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:52:43,778 INFO L93 Difference]: Finished difference Result 1841 states and 6067 transitions. [2021-06-05 23:52:43,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 23:52:43,779 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:52:43,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:52:43,782 INFO L225 Difference]: With dead ends: 1841 [2021-06-05 23:52:43,782 INFO L226 Difference]: Without dead ends: 1812 [2021-06-05 23:52:43,782 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 762.7ms TimeCoverageRelationStatistics Valid=192, Invalid=800, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:52:43,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1812 states. [2021-06-05 23:52:43,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1812 to 1353. [2021-06-05 23:52:43,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1353 states, 1352 states have (on average 3.400147928994083) internal successors, (4597), 1352 states have internal predecessors, (4597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:43,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1353 states to 1353 states and 4597 transitions. [2021-06-05 23:52:43,799 INFO L78 Accepts]: Start accepts. Automaton has 1353 states and 4597 transitions. Word has length 26 [2021-06-05 23:52:43,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:52:43,799 INFO L482 AbstractCegarLoop]: Abstraction has 1353 states and 4597 transitions. [2021-06-05 23:52:43,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:43,799 INFO L276 IsEmpty]: Start isEmpty. Operand 1353 states and 4597 transitions. [2021-06-05 23:52:43,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:52:43,801 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:52:43,801 INFO L554 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] [2021-06-05 23:52:44,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2139 [2021-06-05 23:52:44,002 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:52:44,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:52:44,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1042414331, now seen corresponding path program 22 times [2021-06-05 23:52:44,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:52:44,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648107143] [2021-06-05 23:52:44,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:52:44,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:52:44,230 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:44,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:52:44,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648107143] [2021-06-05 23:52:44,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648107143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:44,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984144237] [2021-06-05 23:52:44,231 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:52:44,256 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:52:44,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:52:44,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:52:44,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:52:44,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:44,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:52:44,389 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-06-05 23:52:44,391 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:52:44,398 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:44,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:44,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:52:44,401 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:52:44,403 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:52:44,409 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:44,415 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:44,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 23:52:44,417 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:44,425 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:44,427 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:52:44,427 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-05 23:52:44,445 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:44,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984144237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:44,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:52:44,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 23:52:44,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960657135] [2021-06-05 23:52:44,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 23:52:44,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:52:44,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 23:52:44,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 23:52:44,446 INFO L87 Difference]: Start difference. First operand 1353 states and 4597 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:44,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:52:44,759 INFO L93 Difference]: Finished difference Result 1466 states and 4903 transitions. [2021-06-05 23:52:44,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 23:52:44,760 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:52:44,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:52:44,762 INFO L225 Difference]: With dead ends: 1466 [2021-06-05 23:52:44,762 INFO L226 Difference]: Without dead ends: 1451 [2021-06-05 23:52:44,762 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 353.6ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:52:44,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1451 states. [2021-06-05 23:52:44,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1451 to 1359. [2021-06-05 23:52:44,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1359 states, 1358 states have (on average 3.402061855670103) internal successors, (4620), 1358 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:44,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1359 states to 1359 states and 4620 transitions. [2021-06-05 23:52:44,779 INFO L78 Accepts]: Start accepts. Automaton has 1359 states and 4620 transitions. Word has length 26 [2021-06-05 23:52:44,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:52:44,779 INFO L482 AbstractCegarLoop]: Abstraction has 1359 states and 4620 transitions. [2021-06-05 23:52:44,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:44,780 INFO L276 IsEmpty]: Start isEmpty. Operand 1359 states and 4620 transitions. [2021-06-05 23:52:44,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:52:44,782 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:52:44,782 INFO L554 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] [2021-06-05 23:52:44,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2158,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:52:44,984 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:52:44,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:52:44,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1681727365, now seen corresponding path program 23 times [2021-06-05 23:52:44,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:52:44,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954955144] [2021-06-05 23:52:44,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:52:44,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:52:45,206 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:45,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:52:45,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954955144] [2021-06-05 23:52:45,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954955144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:45,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969609202] [2021-06-05 23:52:45,207 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:52:45,233 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:52:45,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:52:45,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:52:45,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:52:46,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:46,441 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:46,441 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 43 treesize of output 43 [2021-06-05 23:52:46,458 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:52:46,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:46,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:46,477 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:46,478 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 35 treesize of output 35 [2021-06-05 23:52:46,495 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:52:46,510 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:46,533 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:46,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-06-05 23:52:46,538 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 23:52:46,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:46,596 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:52:46,596 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:52, output treesize:15 [2021-06-05 23:52:46,637 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:46,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969609202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:46,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:52:46,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 23:52:46,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308433939] [2021-06-05 23:52:46,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 23:52:46,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:52:46,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 23:52:46,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=278, Unknown=1, NotChecked=0, Total=342 [2021-06-05 23:52:46,638 INFO L87 Difference]: Start difference. First operand 1359 states and 4620 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:47,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:52:47,320 INFO L93 Difference]: Finished difference Result 1987 states and 6490 transitions. [2021-06-05 23:52:47,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 23:52:47,320 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:52:47,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:52:47,323 INFO L225 Difference]: With dead ends: 1987 [2021-06-05 23:52:47,323 INFO L226 Difference]: Without dead ends: 1937 [2021-06-05 23:52:47,323 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 1757.3ms TimeCoverageRelationStatistics Valid=191, Invalid=864, Unknown=1, NotChecked=0, Total=1056 [2021-06-05 23:52:47,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1937 states. [2021-06-05 23:52:47,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1937 to 1366. [2021-06-05 23:52:47,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1366 states, 1365 states have (on average 3.4065934065934065) internal successors, (4650), 1365 states have internal predecessors, (4650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:47,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1366 states to 1366 states and 4650 transitions. [2021-06-05 23:52:47,342 INFO L78 Accepts]: Start accepts. Automaton has 1366 states and 4650 transitions. Word has length 26 [2021-06-05 23:52:47,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:52:47,342 INFO L482 AbstractCegarLoop]: Abstraction has 1366 states and 4650 transitions. [2021-06-05 23:52:47,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:47,342 INFO L276 IsEmpty]: Start isEmpty. Operand 1366 states and 4650 transitions. [2021-06-05 23:52:47,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:52:47,344 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:52:47,344 INFO L554 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] [2021-06-05 23:52:47,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2159 [2021-06-05 23:52:47,546 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:52:47,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:52:47,546 INFO L82 PathProgramCache]: Analyzing trace with hash 508379419, now seen corresponding path program 24 times [2021-06-05 23:52:47,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:52:47,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745827209] [2021-06-05 23:52:47,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:52:47,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:52:47,768 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:47,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:52:47,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745827209] [2021-06-05 23:52:47,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745827209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:47,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147577507] [2021-06-05 23:52:47,769 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:52:47,801 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:52:47,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:52:47,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:52:47,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:52:47,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:47,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:47,970 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:47,970 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 57 treesize of output 53 [2021-06-05 23:52:47,993 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:52:48,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:48,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:48,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:48,014 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:48,015 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 45 treesize of output 41 [2021-06-05 23:52:48,036 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:52:48,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:48,073 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:48,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 33 treesize of output 53 [2021-06-05 23:52:48,080 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 23:52:48,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:48,140 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:52:48,140 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:65, output treesize:17 [2021-06-05 23:52:48,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:48,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147577507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:48,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:52:48,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 23:52:48,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477657062] [2021-06-05 23:52:48,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:52:48,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:52:48,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:52:48,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:52:48,176 INFO L87 Difference]: Start difference. First operand 1366 states and 4650 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:48,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:52:48,915 INFO L93 Difference]: Finished difference Result 1843 states and 6121 transitions. [2021-06-05 23:52:48,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 23:52:48,915 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:52:48,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:52:48,918 INFO L225 Difference]: With dead ends: 1843 [2021-06-05 23:52:48,918 INFO L226 Difference]: Without dead ends: 1824 [2021-06-05 23:52:48,918 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 738.5ms TimeCoverageRelationStatistics Valid=192, Invalid=930, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 23:52:48,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1824 states. [2021-06-05 23:52:48,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1824 to 1378. [2021-06-05 23:52:48,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1378 states, 1377 states have (on average 3.4095860566448803) internal successors, (4695), 1377 states have internal predecessors, (4695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:48,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1378 states to 1378 states and 4695 transitions. [2021-06-05 23:52:48,939 INFO L78 Accepts]: Start accepts. Automaton has 1378 states and 4695 transitions. Word has length 26 [2021-06-05 23:52:48,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:52:48,940 INFO L482 AbstractCegarLoop]: Abstraction has 1378 states and 4695 transitions. [2021-06-05 23:52:48,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:48,940 INFO L276 IsEmpty]: Start isEmpty. Operand 1378 states and 4695 transitions. [2021-06-05 23:52:48,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:52:48,942 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:52:48,942 INFO L554 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] [2021-06-05 23:52:49,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2178 [2021-06-05 23:52:49,157 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:52:49,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:52:49,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1495871031, now seen corresponding path program 25 times [2021-06-05 23:52:49,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:52:49,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919625055] [2021-06-05 23:52:49,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:52:49,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:52:49,362 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:49,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:52:49,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919625055] [2021-06-05 23:52:49,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919625055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:49,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291282990] [2021-06-05 23:52:49,363 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:52:49,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:52:49,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:52:49,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:52:49,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:49,518 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:49,518 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 43 treesize of output 43 [2021-06-05 23:52:49,539 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:52:49,553 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:49,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:49,562 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:49,562 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 35 treesize of output 35 [2021-06-05 23:52:49,583 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:52:49,601 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:49,621 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:49,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-06-05 23:52:49,633 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 23:52:49,678 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:49,693 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:52:49,693 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:54, output treesize:19 [2021-06-05 23:52:49,731 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:49,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291282990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:49,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:52:49,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 23:52:49,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4040703] [2021-06-05 23:52:49,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 23:52:49,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:52:49,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 23:52:49,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:52:49,733 INFO L87 Difference]: Start difference. First operand 1378 states and 4695 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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) [2021-06-05 23:52:50,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:52:50,312 INFO L93 Difference]: Finished difference Result 1965 states and 6485 transitions. [2021-06-05 23:52:50,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 23:52:50,312 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 [2021-06-05 23:52:50,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:52:50,316 INFO L225 Difference]: With dead ends: 1965 [2021-06-05 23:52:50,316 INFO L226 Difference]: Without dead ends: 1940 [2021-06-05 23:52:50,316 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 537.8ms TimeCoverageRelationStatistics Valid=185, Invalid=745, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:52:50,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1940 states. [2021-06-05 23:52:50,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1940 to 1378. [2021-06-05 23:52:50,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1378 states, 1377 states have (on average 3.4095860566448803) internal successors, (4695), 1377 states have internal predecessors, (4695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:50,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1378 states to 1378 states and 4695 transitions. [2021-06-05 23:52:50,336 INFO L78 Accepts]: Start accepts. Automaton has 1378 states and 4695 transitions. Word has length 26 [2021-06-05 23:52:50,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:52:50,336 INFO L482 AbstractCegarLoop]: Abstraction has 1378 states and 4695 transitions. [2021-06-05 23:52:50,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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) [2021-06-05 23:52:50,336 INFO L276 IsEmpty]: Start isEmpty. Operand 1378 states and 4695 transitions. [2021-06-05 23:52:50,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:52:50,338 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:52:50,339 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:52:50,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2195,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:52:50,539 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:52:50,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:52:50,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1425327497, now seen corresponding path program 42 times [2021-06-05 23:52:50,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:52:50,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609035588] [2021-06-05 23:52:50,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:52:50,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:52:50,821 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:50,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:52:50,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609035588] [2021-06-05 23:52:50,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609035588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:50,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098432333] [2021-06-05 23:52:50,822 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:52:50,861 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:52:50,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:52:50,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:52:50,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:52:51,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:52:51,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:51,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:52:51,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-06-05 23:52:51,029 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:52:51,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:51,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:52:51,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:51,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:52:51,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 23:52:51,042 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:52:51,049 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:51,056 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:51,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 23:52:51,058 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:51,067 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:51,068 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:52:51,069 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-05 23:52:51,084 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:51,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098432333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:51,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:52:51,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 23:52:51,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524993076] [2021-06-05 23:52:51,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:52:51,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:52:51,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:52:51,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:52:51,085 INFO L87 Difference]: Start difference. First operand 1378 states and 4695 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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) [2021-06-05 23:52:52,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:52:52,192 INFO L93 Difference]: Finished difference Result 1798 states and 5944 transitions. [2021-06-05 23:52:52,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 23:52:52,193 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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 26 [2021-06-05 23:52:52,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:52:52,195 INFO L225 Difference]: With dead ends: 1798 [2021-06-05 23:52:52,195 INFO L226 Difference]: Without dead ends: 1772 [2021-06-05 23:52:52,195 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 1161.7ms TimeCoverageRelationStatistics Valid=284, Invalid=1198, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:52:52,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1772 states. [2021-06-05 23:52:52,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1772 to 1390. [2021-06-05 23:52:52,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1390 states, 1389 states have (on average 3.4046076313894886) internal successors, (4729), 1389 states have internal predecessors, (4729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:52:52,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1390 states to 1390 states and 4729 transitions. [2021-06-05 23:52:52,225 INFO L78 Accepts]: Start accepts. Automaton has 1390 states and 4729 transitions. Word has length 26 [2021-06-05 23:52:52,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:52:52,225 INFO L482 AbstractCegarLoop]: Abstraction has 1390 states and 4729 transitions. [2021-06-05 23:52:52,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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) [2021-06-05 23:52:52,225 INFO L276 IsEmpty]: Start isEmpty. Operand 1390 states and 4729 transitions. [2021-06-05 23:52:52,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:52:52,227 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:52:52,227 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:52:52,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2214,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:52:52,427 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:52:52,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:52:52,428 INFO L82 PathProgramCache]: Analyzing trace with hash -357452933, now seen corresponding path program 43 times [2021-06-05 23:52:52,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:52:52,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166271789] [2021-06-05 23:52:52,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:52:52,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:52:52,683 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:52,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:52:52,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166271789] [2021-06-05 23:52:52,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166271789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:52,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182228552] [2021-06-05 23:52:52,684 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:52:52,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:52:52,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:52:52,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:52:57,616 WARN L205 SmtUtils]: Spent 1.03 s on a formula simplification that was a NOOP. DAG size: 32 [2021-06-05 23:52:57,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:52:57,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:57,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:52:57,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-06-05 23:52:57,628 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:52:57,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:57,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:52:57,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:52:57,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:52:57,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 23:52:57,640 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:52:57,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:57,652 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:57,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 23:52:57,653 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:52:57,661 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:52:57,662 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:52:57,662 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-05 23:52:57,680 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:52:57,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182228552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:52:57,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:52:57,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-05 23:52:57,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761969606] [2021-06-05 23:52:57,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 23:52:57,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:52:57,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 23:52:57,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=214, Unknown=3, NotChecked=0, Total=272 [2021-06-05 23:52:57,681 INFO L87 Difference]: Start difference. First operand 1390 states and 4729 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:23,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:53:23,791 INFO L93 Difference]: Finished difference Result 1990 states and 6587 transitions. [2021-06-05 23:53:23,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 23:53:23,791 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:53:23,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:53:23,795 INFO L225 Difference]: With dead ends: 1990 [2021-06-05 23:53:23,795 INFO L226 Difference]: Without dead ends: 1975 [2021-06-05 23:53:23,796 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 12536.2ms TimeCoverageRelationStatistics Valid=336, Invalid=1376, Unknown=10, NotChecked=0, Total=1722 [2021-06-05 23:53:23,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1975 states. [2021-06-05 23:53:23,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1975 to 1390. [2021-06-05 23:53:23,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1390 states, 1389 states have (on average 3.4046076313894886) internal successors, (4729), 1389 states have internal predecessors, (4729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:23,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1390 states to 1390 states and 4729 transitions. [2021-06-05 23:53:23,820 INFO L78 Accepts]: Start accepts. Automaton has 1390 states and 4729 transitions. Word has length 26 [2021-06-05 23:53:23,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:53:23,820 INFO L482 AbstractCegarLoop]: Abstraction has 1390 states and 4729 transitions. [2021-06-05 23:53:23,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:23,820 INFO L276 IsEmpty]: Start isEmpty. Operand 1390 states and 4729 transitions. [2021-06-05 23:53:23,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:53:23,822 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:53:23,822 INFO L554 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] [2021-06-05 23:53:24,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2215 [2021-06-05 23:53:24,037 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:53:24,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:53:24,037 INFO L82 PathProgramCache]: Analyzing trace with hash -945828357, now seen corresponding path program 26 times [2021-06-05 23:53:24,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:53:24,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548689324] [2021-06-05 23:53:24,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:53:24,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:53:24,231 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:53:24,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:53:24,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548689324] [2021-06-05 23:53:24,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548689324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:24,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533151470] [2021-06-05 23:53:24,231 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:53:24,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:53:24,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:53:24,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:53:24,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:53:24,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:24,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:53:24,404 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-06-05 23:53:24,406 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:53:24,412 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:24,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:24,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:53:24,415 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:53:24,417 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:53:24,422 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:24,428 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:24,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 23:53:24,430 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:53:24,438 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:24,439 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:53:24,439 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-05 23:53:24,455 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:53:24,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533151470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:24,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:53:24,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 23:53:24,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830030369] [2021-06-05 23:53:24,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 23:53:24,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:53:24,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 23:53:24,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:53:24,456 INFO L87 Difference]: Start difference. First operand 1390 states and 4729 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:25,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:53:25,112 INFO L93 Difference]: Finished difference Result 1896 states and 6197 transitions. [2021-06-05 23:53:25,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 23:53:25,113 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:53:25,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:53:25,115 INFO L225 Difference]: With dead ends: 1896 [2021-06-05 23:53:25,116 INFO L226 Difference]: Without dead ends: 1881 [2021-06-05 23:53:25,116 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 663.2ms TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:53:25,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1881 states. [2021-06-05 23:53:25,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1881 to 1401. [2021-06-05 23:53:25,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1401 states, 1400 states have (on average 3.405) internal successors, (4767), 1400 states have internal predecessors, (4767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:25,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1401 states to 1401 states and 4767 transitions. [2021-06-05 23:53:25,133 INFO L78 Accepts]: Start accepts. Automaton has 1401 states and 4767 transitions. Word has length 26 [2021-06-05 23:53:25,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:53:25,133 INFO L482 AbstractCegarLoop]: Abstraction has 1401 states and 4767 transitions. [2021-06-05 23:53:25,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:25,133 INFO L276 IsEmpty]: Start isEmpty. Operand 1401 states and 4767 transitions. [2021-06-05 23:53:25,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:53:25,135 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:53:25,135 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:53:25,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2216,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:53:25,335 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:53:25,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:53:25,336 INFO L82 PathProgramCache]: Analyzing trace with hash 604553207, now seen corresponding path program 44 times [2021-06-05 23:53:25,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:53:25,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679257824] [2021-06-05 23:53:25,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:53:25,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:53:25,652 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:53:25,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:53:25,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679257824] [2021-06-05 23:53:25,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679257824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:25,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027136579] [2021-06-05 23:53:25,653 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:53:25,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:53:25,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:53:25,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:53:25,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:53:25,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:25,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:25,919 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:25,919 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 47 treesize of output 63 [2021-06-05 23:53:26,021 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 23:53:26,048 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:26,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:26,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:26,064 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:26,065 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 37 treesize of output 53 [2021-06-05 23:53:26,142 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 23:53:26,173 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:26,210 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:26,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 83 [2021-06-05 23:53:26,450 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 23:53:27,350 WARN L205 SmtUtils]: Spent 899.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 119 [2021-06-05 23:53:27,350 INFO L628 ElimStorePlain]: treesize reduction 426, result has 80.4 percent of original size [2021-06-05 23:53:27,761 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:53:27,762 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:58, output treesize:149 [2021-06-05 23:53:27,828 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:53:27,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027136579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:27,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:53:27,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 23:53:27,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51028378] [2021-06-05 23:53:27,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 23:53:27,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:53:27,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 23:53:27,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-05 23:53:27,829 INFO L87 Difference]: Start difference. First operand 1401 states and 4767 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:29,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:53:29,749 INFO L93 Difference]: Finished difference Result 2295 states and 7289 transitions. [2021-06-05 23:53:29,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 23:53:29,749 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:53:29,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:53:29,752 INFO L225 Difference]: With dead ends: 2295 [2021-06-05 23:53:29,752 INFO L226 Difference]: Without dead ends: 2251 [2021-06-05 23:53:29,753 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1773.0ms TimeCoverageRelationStatistics Valid=492, Invalid=2370, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 23:53:29,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2251 states. [2021-06-05 23:53:29,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2251 to 1408. [2021-06-05 23:53:29,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1408 states, 1407 states have (on average 3.405828002842928) internal successors, (4792), 1407 states have internal predecessors, (4792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:29,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1408 states to 1408 states and 4792 transitions. [2021-06-05 23:53:29,771 INFO L78 Accepts]: Start accepts. Automaton has 1408 states and 4792 transitions. Word has length 26 [2021-06-05 23:53:29,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:53:29,771 INFO L482 AbstractCegarLoop]: Abstraction has 1408 states and 4792 transitions. [2021-06-05 23:53:29,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:29,771 INFO L276 IsEmpty]: Start isEmpty. Operand 1408 states and 4792 transitions. [2021-06-05 23:53:29,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:53:29,772 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:53:29,772 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:53:29,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2217 [2021-06-05 23:53:29,973 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:53:29,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:53:29,973 INFO L82 PathProgramCache]: Analyzing trace with hash -371765637, now seen corresponding path program 45 times [2021-06-05 23:53:29,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:53:29,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017324531] [2021-06-05 23:53:29,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:53:29,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:53:30,182 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:53:30,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:53:30,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017324531] [2021-06-05 23:53:30,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017324531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:30,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164159382] [2021-06-05 23:53:30,182 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:53:30,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:53:30,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:53:30,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:53:30,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:53:30,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:30,401 INFO L354 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2021-06-05 23:53:30,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 237 treesize of output 217 [2021-06-05 23:53:30,469 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 23:53:30,495 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:30,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:30,527 INFO L354 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2021-06-05 23:53:30,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 221 treesize of output 195 [2021-06-05 23:53:30,705 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 23:53:30,740 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:30,770 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:30,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 193 treesize of output 177 [2021-06-05 23:53:31,045 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:53:31,555 WARN L205 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 122 [2021-06-05 23:53:31,556 INFO L628 ElimStorePlain]: treesize reduction 242, result has 87.7 percent of original size [2021-06-05 23:53:31,950 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:53:31,950 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:245, output treesize:232 [2021-06-05 23:53:32,035 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:53:32,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164159382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:32,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:53:32,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-05 23:53:32,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690810032] [2021-06-05 23:53:32,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 23:53:32,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:53:32,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 23:53:32,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:53:32,036 INFO L87 Difference]: Start difference. First operand 1408 states and 4792 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:33,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:53:33,644 INFO L93 Difference]: Finished difference Result 2489 states and 8040 transitions. [2021-06-05 23:53:33,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 23:53:33,644 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:53:33,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:53:33,648 INFO L225 Difference]: With dead ends: 2489 [2021-06-05 23:53:33,648 INFO L226 Difference]: Without dead ends: 2474 [2021-06-05 23:53:33,648 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 1293.3ms TimeCoverageRelationStatistics Valid=347, Invalid=1909, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 23:53:33,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2474 states. [2021-06-05 23:53:33,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2474 to 1418. [2021-06-05 23:53:33,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1418 states, 1417 states have (on average 3.4064925899788285) internal successors, (4827), 1417 states have internal predecessors, (4827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:33,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1418 states to 1418 states and 4827 transitions. [2021-06-05 23:53:33,669 INFO L78 Accepts]: Start accepts. Automaton has 1418 states and 4827 transitions. Word has length 26 [2021-06-05 23:53:33,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:53:33,669 INFO L482 AbstractCegarLoop]: Abstraction has 1418 states and 4827 transitions. [2021-06-05 23:53:33,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:33,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1418 states and 4827 transitions. [2021-06-05 23:53:33,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:53:33,671 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:53:33,671 INFO L554 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] [2021-06-05 23:53:33,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2350,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:53:33,873 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:53:33,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:53:33,873 INFO L82 PathProgramCache]: Analyzing trace with hash 644042019, now seen corresponding path program 27 times [2021-06-05 23:53:33,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:53:33,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702940482] [2021-06-05 23:53:33,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:53:33,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:53:34,062 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:53:34,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:53:34,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702940482] [2021-06-05 23:53:34,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702940482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:34,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949885790] [2021-06-05 23:53:34,063 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:53:34,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:53:34,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:53:34,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:53:34,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:53:34,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:34,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:53:34,243 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-06-05 23:53:34,244 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:53:34,250 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:34,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:34,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:53:34,253 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:53:34,255 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:53:34,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:34,267 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:34,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 23:53:34,269 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:53:34,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:34,278 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:53:34,278 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-05 23:53:34,294 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:53:34,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949885790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:34,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:53:34,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 23:53:34,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29824357] [2021-06-05 23:53:34,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 23:53:34,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:53:34,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 23:53:34,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:53:34,295 INFO L87 Difference]: Start difference. First operand 1418 states and 4827 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:35,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:53:35,178 INFO L93 Difference]: Finished difference Result 2009 states and 6538 transitions. [2021-06-05 23:53:35,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 23:53:35,178 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:53:35,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:53:35,181 INFO L225 Difference]: With dead ends: 2009 [2021-06-05 23:53:35,181 INFO L226 Difference]: Without dead ends: 1994 [2021-06-05 23:53:35,181 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 765.4ms TimeCoverageRelationStatistics Valid=227, Invalid=765, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:53:35,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1994 states. [2021-06-05 23:53:35,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1994 to 1423. [2021-06-05 23:53:35,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1423 states, 1422 states have (on average 3.407876230661041) internal successors, (4846), 1422 states have internal predecessors, (4846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:35,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1423 states to 1423 states and 4846 transitions. [2021-06-05 23:53:35,199 INFO L78 Accepts]: Start accepts. Automaton has 1423 states and 4846 transitions. Word has length 26 [2021-06-05 23:53:35,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:53:35,199 INFO L482 AbstractCegarLoop]: Abstraction has 1423 states and 4846 transitions. [2021-06-05 23:53:35,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:35,199 INFO L276 IsEmpty]: Start isEmpty. Operand 1423 states and 4846 transitions. [2021-06-05 23:53:35,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:53:35,200 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:53:35,201 INFO L554 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] [2021-06-05 23:53:35,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2498 [2021-06-05 23:53:35,401 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:53:35,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:53:35,402 INFO L82 PathProgramCache]: Analyzing trace with hash -973490761, now seen corresponding path program 28 times [2021-06-05 23:53:35,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:53:35,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549196163] [2021-06-05 23:53:35,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:53:35,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:53:35,552 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:53:35,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:53:35,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549196163] [2021-06-05 23:53:35,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549196163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:35,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160387308] [2021-06-05 23:53:35,553 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:53:35,577 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:53:35,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:53:35,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:53:35,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:53:35,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:35,697 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:35,698 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 43 treesize of output 43 [2021-06-05 23:53:35,727 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:53:35,739 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:35,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:35,746 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:35,746 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 35 treesize of output 35 [2021-06-05 23:53:35,767 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:53:35,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:35,809 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:35,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-06-05 23:53:35,822 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 23:53:35,870 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:35,884 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:53:35,884 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:54, output treesize:19 [2021-06-05 23:53:35,922 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:53:35,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160387308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:35,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:53:35,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 23:53:35,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654585642] [2021-06-05 23:53:35,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 23:53:35,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:53:35,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 23:53:35,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:53:35,923 INFO L87 Difference]: Start difference. First operand 1423 states and 4846 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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) [2021-06-05 23:53:37,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:53:37,082 INFO L93 Difference]: Finished difference Result 2401 states and 7734 transitions. [2021-06-05 23:53:37,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 23:53:37,082 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 [2021-06-05 23:53:37,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:53:37,086 INFO L225 Difference]: With dead ends: 2401 [2021-06-05 23:53:37,086 INFO L226 Difference]: Without dead ends: 2382 [2021-06-05 23:53:37,086 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 837.9ms TimeCoverageRelationStatistics Valid=342, Invalid=1218, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 23:53:37,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2382 states. [2021-06-05 23:53:37,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2382 to 1416. [2021-06-05 23:53:37,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1416 states, 1415 states have (on average 3.4063604240282683) internal successors, (4820), 1415 states have internal predecessors, (4820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:37,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 4820 transitions. [2021-06-05 23:53:37,107 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 4820 transitions. Word has length 26 [2021-06-05 23:53:37,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:53:37,107 INFO L482 AbstractCegarLoop]: Abstraction has 1416 states and 4820 transitions. [2021-06-05 23:53:37,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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) [2021-06-05 23:53:37,107 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 4820 transitions. [2021-06-05 23:53:37,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:53:37,109 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:53:37,109 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:53:37,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2499,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:53:37,309 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:53:37,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:53:37,310 INFO L82 PathProgramCache]: Analyzing trace with hash 830546731, now seen corresponding path program 46 times [2021-06-05 23:53:37,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:53:37,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760315433] [2021-06-05 23:53:37,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:53:37,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:53:37,534 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:53:37,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:53:37,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760315433] [2021-06-05 23:53:37,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760315433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:37,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106984681] [2021-06-05 23:53:37,535 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:53:37,559 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:53:37,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:53:37,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:53:37,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:53:37,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:53:37,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:37,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:37,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:53:37,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-06-05 23:53:37,693 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:53:37,701 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:37,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:53:37,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:37,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:37,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:53:37,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 23:53:37,706 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:53:37,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:37,718 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:37,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 23:53:37,720 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:53:37,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:37,729 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:53:37,729 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-05 23:53:37,747 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:53:37,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106984681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:37,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:53:37,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 23:53:37,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933230007] [2021-06-05 23:53:37,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:53:37,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:53:37,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:53:37,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:53:37,748 INFO L87 Difference]: Start difference. First operand 1416 states and 4820 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:39,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:53:39,283 INFO L93 Difference]: Finished difference Result 3014 states and 9632 transitions. [2021-06-05 23:53:39,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 23:53:39,284 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:53:39,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:53:39,288 INFO L225 Difference]: With dead ends: 3014 [2021-06-05 23:53:39,288 INFO L226 Difference]: Without dead ends: 2978 [2021-06-05 23:53:39,288 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 1259.3ms TimeCoverageRelationStatistics Valid=425, Invalid=1831, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 23:53:39,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2978 states. [2021-06-05 23:53:39,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2978 to 1549. [2021-06-05 23:53:39,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1549 states, 1548 states have (on average 3.4237726098191215) internal successors, (5300), 1548 states have internal predecessors, (5300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:39,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1549 states to 1549 states and 5300 transitions. [2021-06-05 23:53:39,312 INFO L78 Accepts]: Start accepts. Automaton has 1549 states and 5300 transitions. Word has length 26 [2021-06-05 23:53:39,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:53:39,312 INFO L482 AbstractCegarLoop]: Abstraction has 1549 states and 5300 transitions. [2021-06-05 23:53:39,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:39,312 INFO L276 IsEmpty]: Start isEmpty. Operand 1549 states and 5300 transitions. [2021-06-05 23:53:39,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:53:39,314 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:53:39,314 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:53:39,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2519,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:53:39,515 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:53:39,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:53:39,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1630771913, now seen corresponding path program 47 times [2021-06-05 23:53:39,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:53:39,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366745074] [2021-06-05 23:53:39,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:53:39,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:53:39,715 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:53:39,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:53:39,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366745074] [2021-06-05 23:53:39,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366745074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:39,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135113989] [2021-06-05 23:53:39,715 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:53:39,741 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:53:39,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:53:39,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:53:39,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:53:39,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:39,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:39,851 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:39,851 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 47 treesize of output 65 [2021-06-05 23:53:39,945 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 23:53:39,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:39,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:39,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:39,981 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:39,981 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 37 treesize of output 55 [2021-06-05 23:53:40,059 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 23:53:40,090 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:40,128 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:40,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 83 [2021-06-05 23:53:40,298 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 23:53:40,717 WARN L205 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 119 [2021-06-05 23:53:40,718 INFO L628 ElimStorePlain]: treesize reduction 248, result has 85.3 percent of original size [2021-06-05 23:53:40,936 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:53:40,936 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:56, output treesize:48 [2021-06-05 23:53:40,988 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:53:40,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135113989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:40,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:53:40,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2021-06-05 23:53:40,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755541270] [2021-06-05 23:53:40,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:53:40,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:53:40,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:53:40,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:53:40,989 INFO L87 Difference]: Start difference. First operand 1549 states and 5300 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:42,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:53:42,841 INFO L93 Difference]: Finished difference Result 3396 states and 10730 transitions. [2021-06-05 23:53:42,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 23:53:42,842 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:53:42,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:53:42,846 INFO L225 Difference]: With dead ends: 3396 [2021-06-05 23:53:42,846 INFO L226 Difference]: Without dead ends: 3339 [2021-06-05 23:53:42,847 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 1539.3ms TimeCoverageRelationStatistics Valid=512, Invalid=2038, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 23:53:42,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3339 states. [2021-06-05 23:53:42,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3339 to 1572. [2021-06-05 23:53:42,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1572 states, 1571 states have (on average 3.426479949077021) internal successors, (5383), 1571 states have internal predecessors, (5383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:42,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1572 states to 1572 states and 5383 transitions. [2021-06-05 23:53:42,878 INFO L78 Accepts]: Start accepts. Automaton has 1572 states and 5383 transitions. Word has length 26 [2021-06-05 23:53:42,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:53:42,878 INFO L482 AbstractCegarLoop]: Abstraction has 1572 states and 5383 transitions. [2021-06-05 23:53:42,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:42,879 INFO L276 IsEmpty]: Start isEmpty. Operand 1572 states and 5383 transitions. [2021-06-05 23:53:42,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:53:42,881 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:53:42,881 INFO L554 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] [2021-06-05 23:53:43,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2520 [2021-06-05 23:53:43,082 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:53:43,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:53:43,082 INFO L82 PathProgramCache]: Analyzing trace with hash 219730783, now seen corresponding path program 29 times [2021-06-05 23:53:43,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:53:43,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584465770] [2021-06-05 23:53:43,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:53:43,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:53:43,273 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:53:43,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:53:43,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584465770] [2021-06-05 23:53:43,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584465770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:43,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029545122] [2021-06-05 23:53:43,273 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:53:43,298 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:53:43,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:53:43,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:53:43,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:53:43,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:43,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:53:43,516 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-06-05 23:53:43,518 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:53:43,526 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:43,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:43,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:53:43,529 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:53:43,531 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:53:43,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:43,546 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:43,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 23:53:43,547 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:53:43,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:43,559 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:53:43,559 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-05 23:53:43,578 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:53:43,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029545122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:43,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:53:43,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 23:53:43,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475018700] [2021-06-05 23:53:43,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 23:53:43,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:53:43,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 23:53:43,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:53:43,579 INFO L87 Difference]: Start difference. First operand 1572 states and 5383 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:44,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:53:44,508 INFO L93 Difference]: Finished difference Result 1983 states and 6657 transitions. [2021-06-05 23:53:44,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 23:53:44,508 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:53:44,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:53:44,511 INFO L225 Difference]: With dead ends: 1983 [2021-06-05 23:53:44,511 INFO L226 Difference]: Without dead ends: 1968 [2021-06-05 23:53:44,512 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 717.5ms TimeCoverageRelationStatistics Valid=209, Invalid=847, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:53:44,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1968 states. [2021-06-05 23:53:44,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1968 to 1583. [2021-06-05 23:53:44,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1583 states, 1582 states have (on average 3.4260429835651074) internal successors, (5420), 1582 states have internal predecessors, (5420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:44,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1583 states to 1583 states and 5420 transitions. [2021-06-05 23:53:44,533 INFO L78 Accepts]: Start accepts. Automaton has 1583 states and 5420 transitions. Word has length 26 [2021-06-05 23:53:44,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:53:44,533 INFO L482 AbstractCegarLoop]: Abstraction has 1583 states and 5420 transitions. [2021-06-05 23:53:44,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:44,533 INFO L276 IsEmpty]: Start isEmpty. Operand 1583 states and 5420 transitions. [2021-06-05 23:53:44,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:53:44,535 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:53:44,535 INFO L554 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] [2021-06-05 23:53:44,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2633,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:53:44,736 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:53:44,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:53:44,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1397801997, now seen corresponding path program 30 times [2021-06-05 23:53:44,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:53:44,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831566596] [2021-06-05 23:53:44,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:53:44,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:53:44,883 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:53:44,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:53:44,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831566596] [2021-06-05 23:53:44,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831566596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:44,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389716612] [2021-06-05 23:53:44,883 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:53:44,909 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:53:44,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:53:44,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:53:44,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:53:45,045 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:45,045 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 43 treesize of output 51 [2021-06-05 23:53:45,089 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:53:45,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:45,120 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:45,120 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 35 treesize of output 43 [2021-06-05 23:53:45,156 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:53:45,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:45,202 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:45,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-06-05 23:53:45,213 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 23:53:45,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:45,343 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:53:45,343 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:59, output treesize:165 [2021-06-05 23:53:45,439 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:53:45,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389716612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:45,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:53:45,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 23:53:45,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970398765] [2021-06-05 23:53:45,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:53:45,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:53:45,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:53:45,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:53:45,440 INFO L87 Difference]: Start difference. First operand 1583 states and 5420 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:47,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:53:47,043 INFO L93 Difference]: Finished difference Result 2815 states and 9082 transitions. [2021-06-05 23:53:47,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 23:53:47,043 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:53:47,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:53:47,047 INFO L225 Difference]: With dead ends: 2815 [2021-06-05 23:53:47,048 INFO L226 Difference]: Without dead ends: 2777 [2021-06-05 23:53:47,048 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 1235.8ms TimeCoverageRelationStatistics Valid=351, Invalid=1629, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 23:53:47,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2777 states. [2021-06-05 23:53:47,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2777 to 1586. [2021-06-05 23:53:47,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1586 states, 1585 states have (on average 3.4227129337539433) internal successors, (5425), 1585 states have internal predecessors, (5425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:47,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1586 states to 1586 states and 5425 transitions. [2021-06-05 23:53:47,074 INFO L78 Accepts]: Start accepts. Automaton has 1586 states and 5425 transitions. Word has length 26 [2021-06-05 23:53:47,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:53:47,074 INFO L482 AbstractCegarLoop]: Abstraction has 1586 states and 5425 transitions. [2021-06-05 23:53:47,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:47,074 INFO L276 IsEmpty]: Start isEmpty. Operand 1586 states and 5425 transitions. [2021-06-05 23:53:47,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:53:47,076 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:53:47,076 INFO L554 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] [2021-06-05 23:53:47,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2634 [2021-06-05 23:53:47,277 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:53:47,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:53:47,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1207222395, now seen corresponding path program 31 times [2021-06-05 23:53:47,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:53:47,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327811743] [2021-06-05 23:53:47,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:53:47,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:53:47,433 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:53:47,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:53:47,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327811743] [2021-06-05 23:53:47,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327811743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:47,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452687320] [2021-06-05 23:53:47,434 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:53:47,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:53:47,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:53:47,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:53:47,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:47,582 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:47,582 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 43 treesize of output 43 [2021-06-05 23:53:47,599 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:53:47,610 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:47,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:47,617 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:47,618 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 35 treesize of output 35 [2021-06-05 23:53:47,634 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:53:47,649 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:47,668 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:47,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-06-05 23:53:47,678 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 23:53:47,725 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:47,738 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:53:47,738 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:54, output treesize:19 [2021-06-05 23:53:47,776 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:53:47,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452687320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:47,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:53:47,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 23:53:47,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125494478] [2021-06-05 23:53:47,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 23:53:47,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:53:47,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 23:53:47,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:53:47,777 INFO L87 Difference]: Start difference. First operand 1586 states and 5425 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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) [2021-06-05 23:53:48,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:53:48,503 INFO L93 Difference]: Finished difference Result 2234 states and 7413 transitions. [2021-06-05 23:53:48,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 23:53:48,503 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 [2021-06-05 23:53:48,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:53:48,506 INFO L225 Difference]: With dead ends: 2234 [2021-06-05 23:53:48,506 INFO L226 Difference]: Without dead ends: 2209 [2021-06-05 23:53:48,507 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 624.7ms TimeCoverageRelationStatistics Valid=255, Invalid=1005, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:53:48,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2209 states. [2021-06-05 23:53:48,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2209 to 1580. [2021-06-05 23:53:48,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1580 states, 1579 states have (on average 3.4243191893603546) internal successors, (5407), 1579 states have internal predecessors, (5407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:48,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1580 states to 1580 states and 5407 transitions. [2021-06-05 23:53:48,526 INFO L78 Accepts]: Start accepts. Automaton has 1580 states and 5407 transitions. Word has length 26 [2021-06-05 23:53:48,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:53:48,526 INFO L482 AbstractCegarLoop]: Abstraction has 1580 states and 5407 transitions. [2021-06-05 23:53:48,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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) [2021-06-05 23:53:48,526 INFO L276 IsEmpty]: Start isEmpty. Operand 1580 states and 5407 transitions. [2021-06-05 23:53:48,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:53:48,528 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:53:48,528 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:53:48,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2695 [2021-06-05 23:53:48,729 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:53:48,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:53:48,729 INFO L82 PathProgramCache]: Analyzing trace with hash -189976303, now seen corresponding path program 48 times [2021-06-05 23:53:48,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:53:48,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26315601] [2021-06-05 23:53:48,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:53:48,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:53:49,048 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:53:49,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:53:49,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26315601] [2021-06-05 23:53:49,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26315601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:49,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78317042] [2021-06-05 23:53:49,048 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:53:49,075 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:53:49,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:53:49,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:53:49,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:53:49,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:49,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:53:49,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:53:49,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-06-05 23:53:49,230 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:53:49,237 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:49,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:49,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:53:49,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:53:49,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 23:53:49,241 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:53:49,247 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:49,253 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:49,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 23:53:49,254 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:53:49,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:49,264 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:53:49,264 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-05 23:53:49,277 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:53:49,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78317042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:49,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:53:49,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 23:53:49,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360930645] [2021-06-05 23:53:49,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:53:49,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:53:49,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:53:49,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:53:49,278 INFO L87 Difference]: Start difference. First operand 1580 states and 5407 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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) [2021-06-05 23:53:50,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:53:50,630 INFO L93 Difference]: Finished difference Result 2036 states and 6741 transitions. [2021-06-05 23:53:50,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 23:53:50,631 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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 26 [2021-06-05 23:53:50,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:53:50,634 INFO L225 Difference]: With dead ends: 2036 [2021-06-05 23:53:50,634 INFO L226 Difference]: Without dead ends: 2014 [2021-06-05 23:53:50,634 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 1336.3ms TimeCoverageRelationStatistics Valid=344, Invalid=1462, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:53:50,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2014 states. [2021-06-05 23:53:50,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2014 to 1572. [2021-06-05 23:53:50,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1572 states, 1571 states have (on average 3.4239338001273074) internal successors, (5379), 1571 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:53:50,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1572 states to 1572 states and 5379 transitions. [2021-06-05 23:53:50,658 INFO L78 Accepts]: Start accepts. Automaton has 1572 states and 5379 transitions. Word has length 26 [2021-06-05 23:53:50,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:53:50,658 INFO L482 AbstractCegarLoop]: Abstraction has 1572 states and 5379 transitions. [2021-06-05 23:53:50,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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) [2021-06-05 23:53:50,658 INFO L276 IsEmpty]: Start isEmpty. Operand 1572 states and 5379 transitions. [2021-06-05 23:53:50,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:53:50,660 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:53:50,660 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:53:50,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2714,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:53:50,862 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:53:50,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:53:50,863 INFO L82 PathProgramCache]: Analyzing trace with hash 735517563, now seen corresponding path program 49 times [2021-06-05 23:53:50,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:53:50,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101267738] [2021-06-05 23:53:50,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:53:50,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:53:51,155 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:53:51,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:53:51,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101267738] [2021-06-05 23:53:51,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101267738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:51,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858448648] [2021-06-05 23:53:51,156 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:53:51,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:53:51,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:53:51,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:53:54,784 WARN L205 SmtUtils]: Spent 726.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-06-05 23:53:54,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:54,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:54,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:53:54,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:53:54,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-06-05 23:53:54,797 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:53:54,803 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:54,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:54,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:53:54,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:53:54,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:53:54,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 23:53:54,810 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:53:54,815 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:54,822 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:54,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 23:53:54,823 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:53:54,831 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:53:54,833 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:53:54,833 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-05 23:53:54,851 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:53:54,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858448648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:53:54,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:53:54,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-05 23:53:54,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253162220] [2021-06-05 23:53:54,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 23:53:54,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:53:54,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 23:53:54,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=212, Unknown=3, NotChecked=0, Total=272 [2021-06-05 23:53:54,852 INFO L87 Difference]: Start difference. First operand 1572 states and 5379 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:54:49,072 WARN L205 SmtUtils]: Spent 1.37 s on a formula simplification that was a NOOP. DAG size: 44 [2021-06-05 23:54:50,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:54:50,217 INFO L93 Difference]: Finished difference Result 2238 states and 7416 transitions. [2021-06-05 23:54:50,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 23:54:50,218 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:54:50,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:54:50,221 INFO L225 Difference]: With dead ends: 2238 [2021-06-05 23:54:50,221 INFO L226 Difference]: Without dead ends: 2223 [2021-06-05 23:54:50,221 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 16667.5ms TimeCoverageRelationStatistics Valid=421, Invalid=1635, Unknown=14, NotChecked=0, Total=2070 [2021-06-05 23:54:50,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2223 states. [2021-06-05 23:54:50,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2223 to 1572. [2021-06-05 23:54:50,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1572 states, 1571 states have (on average 3.4239338001273074) internal successors, (5379), 1571 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:54:50,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1572 states to 1572 states and 5379 transitions. [2021-06-05 23:54:50,240 INFO L78 Accepts]: Start accepts. Automaton has 1572 states and 5379 transitions. Word has length 26 [2021-06-05 23:54:50,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:54:50,240 INFO L482 AbstractCegarLoop]: Abstraction has 1572 states and 5379 transitions. [2021-06-05 23:54:50,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:54:50,240 INFO L276 IsEmpty]: Start isEmpty. Operand 1572 states and 5379 transitions. [2021-06-05 23:54:50,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:54:50,242 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:54:50,242 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:54:50,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2715,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:54:50,443 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:54:50,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:54:50,443 INFO L82 PathProgramCache]: Analyzing trace with hash -442386977, now seen corresponding path program 50 times [2021-06-05 23:54:50,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:54:50,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985306498] [2021-06-05 23:54:50,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:54:50,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:54:50,668 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:54:50,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:54:50,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985306498] [2021-06-05 23:54:50,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985306498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:54:50,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667343080] [2021-06-05 23:54:50,669 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:54:50,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:54:50,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:54:50,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:54:50,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:54:50,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:54:50,858 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:54:50,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 73 [2021-06-05 23:54:51,020 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 23:54:51,045 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:54:51,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:54:51,065 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:54:51,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 63 [2021-06-05 23:54:51,234 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 23:54:51,275 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:54:51,315 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:54:51,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 83 [2021-06-05 23:54:51,557 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 23:54:52,093 WARN L205 SmtUtils]: Spent 535.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 126 [2021-06-05 23:54:52,093 INFO L628 ElimStorePlain]: treesize reduction 666, result has 70.8 percent of original size [2021-06-05 23:54:52,922 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:54:52,923 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:58, output treesize:20 [2021-06-05 23:54:52,988 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:54:52,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667343080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:54:52,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:54:52,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-05 23:54:52,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710698793] [2021-06-05 23:54:52,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 23:54:52,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:54:52,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 23:54:52,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:54:52,989 INFO L87 Difference]: Start difference. First operand 1572 states and 5379 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:54:56,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:54:56,279 INFO L93 Difference]: Finished difference Result 2935 states and 9380 transitions. [2021-06-05 23:54:56,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 23:54:56,279 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:54:56,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:54:56,283 INFO L225 Difference]: With dead ends: 2935 [2021-06-05 23:54:56,283 INFO L226 Difference]: Without dead ends: 2873 [2021-06-05 23:54:56,284 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1698 ImplicationChecksByTransitivity, 2755.7ms TimeCoverageRelationStatistics Valid=805, Invalid=4895, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 23:54:56,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2873 states. [2021-06-05 23:54:56,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2873 to 1625. [2021-06-05 23:54:56,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1625 states, 1624 states have (on average 3.4224137931034484) internal successors, (5558), 1624 states have internal predecessors, (5558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:54:56,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1625 states to 1625 states and 5558 transitions. [2021-06-05 23:54:56,309 INFO L78 Accepts]: Start accepts. Automaton has 1625 states and 5558 transitions. Word has length 26 [2021-06-05 23:54:56,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:54:56,309 INFO L482 AbstractCegarLoop]: Abstraction has 1625 states and 5558 transitions. [2021-06-05 23:54:56,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:54:56,309 INFO L276 IsEmpty]: Start isEmpty. Operand 1625 states and 5558 transitions. [2021-06-05 23:54:56,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:54:56,311 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:54:56,311 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:54:56,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2716,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:54:56,512 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:54:56,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:54:56,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1988624133, now seen corresponding path program 51 times [2021-06-05 23:54:56,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:54:56,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938234157] [2021-06-05 23:54:56,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:54:56,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:54:56,751 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:54:56,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:54:56,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938234157] [2021-06-05 23:54:56,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938234157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:54:56,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890860095] [2021-06-05 23:54:56,752 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:54:56,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:54:56,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:54:56,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 23:54:56,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:54:56,985 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:54:56,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 83 [2021-06-05 23:54:57,378 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 23:54:57,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:54:57,436 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:54:57,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 73 [2021-06-05 23:54:57,814 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 23:54:57,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:54:57,914 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:54:57,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 83 [2021-06-05 23:54:58,207 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 23:54:58,962 WARN L205 SmtUtils]: Spent 753.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 138 [2021-06-05 23:54:58,962 INFO L628 ElimStorePlain]: treesize reduction 678, result has 71.9 percent of original size [2021-06-05 23:54:59,867 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 278 [2021-06-05 23:55:00,392 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 216 [2021-06-05 23:55:01,205 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 223 [2021-06-05 23:55:01,541 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 189 [2021-06-05 23:55:01,752 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:55:01,752 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:64, output treesize:2790 [2021-06-05 23:55:02,431 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 44 [2021-06-05 23:55:02,567 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:55:02,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890860095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:55:02,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:55:02,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2021-06-05 23:55:02,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696178117] [2021-06-05 23:55:02,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:55:02,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:55:02,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:55:02,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:55:02,568 INFO L87 Difference]: Start difference. First operand 1625 states and 5558 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 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) [2021-06-05 23:55:05,020 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2021-06-05 23:55:05,505 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 47 [2021-06-05 23:55:06,070 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 52 [2021-06-05 23:55:06,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:55:06,134 INFO L93 Difference]: Finished difference Result 2782 states and 8999 transitions. [2021-06-05 23:55:06,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 23:55:06,134 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 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 26 [2021-06-05 23:55:06,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:55:06,138 INFO L225 Difference]: With dead ends: 2782 [2021-06-05 23:55:06,139 INFO L226 Difference]: Without dead ends: 2722 [2021-06-05 23:55:06,139 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 952 ImplicationChecksByTransitivity, 3376.0ms TimeCoverageRelationStatistics Valid=603, Invalid=2937, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 23:55:06,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2722 states. [2021-06-05 23:55:06,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2722 to 1634. [2021-06-05 23:55:06,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1634 states, 1633 states have (on average 3.425597060624617) internal successors, (5594), 1633 states have internal predecessors, (5594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:55:06,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1634 states to 1634 states and 5594 transitions. [2021-06-05 23:55:06,162 INFO L78 Accepts]: Start accepts. Automaton has 1634 states and 5594 transitions. Word has length 26 [2021-06-05 23:55:06,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:55:06,163 INFO L482 AbstractCegarLoop]: Abstraction has 1634 states and 5594 transitions. [2021-06-05 23:55:06,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 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) [2021-06-05 23:55:06,163 INFO L276 IsEmpty]: Start isEmpty. Operand 1634 states and 5594 transitions. [2021-06-05 23:55:06,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:55:06,165 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:55:06,165 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:55:06,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2974 [2021-06-05 23:55:06,366 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:55:06,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:55:06,366 INFO L82 PathProgramCache]: Analyzing trace with hash 521488947, now seen corresponding path program 52 times [2021-06-05 23:55:06,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:55:06,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348253840] [2021-06-05 23:55:06,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:55:06,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:55:06,604 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:55:06,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:55:06,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348253840] [2021-06-05 23:55:06,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348253840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:55:06,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143136974] [2021-06-05 23:55:06,604 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:55:06,629 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:55:06,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:55:06,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:55:06,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:55:11,146 WARN L205 SmtUtils]: Spent 817.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-06-05 23:55:11,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:55:11,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:55:11,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:55:11,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-06-05 23:55:11,167 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:55:11,174 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:55:11,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:55:11,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:55:11,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:55:11,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 23:55:11,178 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:55:11,184 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:55:11,191 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:55:11,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 23:55:11,192 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:55:11,200 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:55:11,202 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:55:11,202 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-05 23:55:11,219 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:55:11,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143136974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:55:11,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:55:11,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-05 23:55:11,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709429389] [2021-06-05 23:55:11,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 23:55:11,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:55:11,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 23:55:11,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=215, Unknown=3, NotChecked=0, Total=272 [2021-06-05 23:55:11,220 INFO L87 Difference]: Start difference. First operand 1634 states and 5594 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:55:13,809 WARN L205 SmtUtils]: Spent 1.31 s on a formula simplification that was a NOOP. DAG size: 35 [2021-06-05 23:55:13,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:55:13,899 INFO L93 Difference]: Finished difference Result 2185 states and 7232 transitions. [2021-06-05 23:55:13,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 23:55:13,899 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:55:13,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:55:13,903 INFO L225 Difference]: With dead ends: 2185 [2021-06-05 23:55:13,903 INFO L226 Difference]: Without dead ends: 2170 [2021-06-05 23:55:13,903 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 6936.5ms TimeCoverageRelationStatistics Valid=350, Invalid=1453, Unknown=3, NotChecked=0, Total=1806 [2021-06-05 23:55:13,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2170 states. [2021-06-05 23:55:13,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2170 to 1638. [2021-06-05 23:55:13,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1638 states, 1637 states have (on average 3.4257788637751987) internal successors, (5608), 1637 states have internal predecessors, (5608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:55:13,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1638 states to 1638 states and 5608 transitions. [2021-06-05 23:55:13,925 INFO L78 Accepts]: Start accepts. Automaton has 1638 states and 5608 transitions. Word has length 26 [2021-06-05 23:55:13,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:55:13,925 INFO L482 AbstractCegarLoop]: Abstraction has 1638 states and 5608 transitions. [2021-06-05 23:55:13,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:55:13,925 INFO L276 IsEmpty]: Start isEmpty. Operand 1638 states and 5608 transitions. [2021-06-05 23:55:13,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:55:13,927 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:55:13,927 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:55:14,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3488,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:55:14,128 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:55:14,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:55:14,128 INFO L82 PathProgramCache]: Analyzing trace with hash -2074580369, now seen corresponding path program 53 times [2021-06-05 23:55:14,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:55:14,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539916282] [2021-06-05 23:55:14,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:55:14,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:55:14,405 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:55:14,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:55:14,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539916282] [2021-06-05 23:55:14,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539916282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:55:14,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126356466] [2021-06-05 23:55:14,405 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:55:14,436 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 23:55:14,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:55:14,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:55:14,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:55:24,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:55:24,831 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-06-05 23:55:24,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 237 treesize of output 219 [2021-06-05 23:55:24,905 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 23:55:24,931 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:55:24,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:55:24,958 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-06-05 23:55:24,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 223 treesize of output 199 [2021-06-05 23:55:25,130 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 23:55:25,168 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:55:25,199 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:55:25,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 197 treesize of output 181 [2021-06-05 23:55:25,461 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 142 [2021-06-05 23:55:25,548 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:55:26,085 WARN L205 SmtUtils]: Spent 536.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 135 [2021-06-05 23:55:26,085 INFO L628 ElimStorePlain]: treesize reduction 162, result has 92.8 percent of original size [2021-06-05 23:55:27,012 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:55:27,012 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:245, output treesize:315 [2021-06-05 23:55:27,088 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:55:27,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126356466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:55:27,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:55:27,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-05 23:55:27,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444017409] [2021-06-05 23:55:27,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 23:55:27,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:55:27,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 23:55:27,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=349, Unknown=6, NotChecked=0, Total=420 [2021-06-05 23:55:27,090 INFO L87 Difference]: Start difference. First operand 1638 states and 5608 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:56:37,227 WARN L205 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 76 DAG size of output: 72 [2021-06-05 23:56:47,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:56:47,453 INFO L93 Difference]: Finished difference Result 2374 states and 7924 transitions. [2021-06-05 23:56:47,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 23:56:47,453 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:56:47,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:56:47,456 INFO L225 Difference]: With dead ends: 2374 [2021-06-05 23:56:47,456 INFO L226 Difference]: Without dead ends: 2359 [2021-06-05 23:56:47,457 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 19574.7ms TimeCoverageRelationStatistics Valid=305, Invalid=1579, Unknown=8, NotChecked=0, Total=1892 [2021-06-05 23:56:47,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2359 states. [2021-06-05 23:56:47,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2359 to 1638. [2021-06-05 23:56:47,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1638 states, 1637 states have (on average 3.4257788637751987) internal successors, (5608), 1637 states have internal predecessors, (5608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:56:47,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1638 states to 1638 states and 5608 transitions. [2021-06-05 23:56:47,476 INFO L78 Accepts]: Start accepts. Automaton has 1638 states and 5608 transitions. Word has length 26 [2021-06-05 23:56:47,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:56:47,476 INFO L482 AbstractCegarLoop]: Abstraction has 1638 states and 5608 transitions. [2021-06-05 23:56:47,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:56:47,477 INFO L276 IsEmpty]: Start isEmpty. Operand 1638 states and 5608 transitions. [2021-06-05 23:56:47,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:56:47,479 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:56:47,479 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:56:47,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3489 [2021-06-05 23:56:47,681 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:56:47,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:56:47,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1346907209, now seen corresponding path program 54 times [2021-06-05 23:56:47,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:56:47,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847009153] [2021-06-05 23:56:47,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:56:47,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:56:47,842 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:56:47,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:56:47,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847009153] [2021-06-05 23:56:47,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847009153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:56:47,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284094830] [2021-06-05 23:56:47,842 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:56:47,896 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:56:47,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:56:47,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:56:47,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:56:48,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:56:48,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:56:48,028 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:56:48,028 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 47 treesize of output 63 [2021-06-05 23:56:48,125 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 23:56:48,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:56:48,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:56:48,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:56:48,160 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:56:48,160 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 37 treesize of output 53 [2021-06-05 23:56:48,245 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 23:56:48,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:56:48,316 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:56:48,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 83 [2021-06-05 23:56:48,619 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 23:56:49,262 WARN L205 SmtUtils]: Spent 642.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 107 [2021-06-05 23:56:49,262 INFO L628 ElimStorePlain]: treesize reduction 1132, result has 46.5 percent of original size [2021-06-05 23:56:49,529 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:56:49,530 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:53, output treesize:15 [2021-06-05 23:56:49,567 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:56:49,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284094830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:56:49,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:56:49,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 18 [2021-06-05 23:56:49,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978279105] [2021-06-05 23:56:49,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 23:56:49,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:56:49,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 23:56:49,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:56:49,568 INFO L87 Difference]: Start difference. First operand 1638 states and 5608 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 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) [2021-06-05 23:56:51,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:56:51,440 INFO L93 Difference]: Finished difference Result 3261 states and 10301 transitions. [2021-06-05 23:56:51,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 23:56:51,441 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 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 26 [2021-06-05 23:56:51,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:56:51,445 INFO L225 Difference]: With dead ends: 3261 [2021-06-05 23:56:51,445 INFO L226 Difference]: Without dead ends: 3214 [2021-06-05 23:56:51,445 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1125 ImplicationChecksByTransitivity, 1447.3ms TimeCoverageRelationStatistics Valid=656, Invalid=3126, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 23:56:51,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3214 states. [2021-06-05 23:56:51,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3214 to 1647. [2021-06-05 23:56:51,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1647 states, 1646 states have (on average 3.4264884568651275) internal successors, (5640), 1646 states have internal predecessors, (5640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:56:51,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1647 states to 1647 states and 5640 transitions. [2021-06-05 23:56:51,471 INFO L78 Accepts]: Start accepts. Automaton has 1647 states and 5640 transitions. Word has length 26 [2021-06-05 23:56:51,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:56:51,471 INFO L482 AbstractCegarLoop]: Abstraction has 1647 states and 5640 transitions. [2021-06-05 23:56:51,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 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) [2021-06-05 23:56:51,471 INFO L276 IsEmpty]: Start isEmpty. Operand 1647 states and 5640 transitions. [2021-06-05 23:56:51,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:56:51,473 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:56:51,473 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:56:51,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3813,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:56:51,674 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:56:51,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:56:51,674 INFO L82 PathProgramCache]: Analyzing trace with hash -916217703, now seen corresponding path program 55 times [2021-06-05 23:56:51,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:56:51,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094959221] [2021-06-05 23:56:51,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:56:51,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:56:51,905 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:56:51,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:56:51,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094959221] [2021-06-05 23:56:51,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094959221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:56:51,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354329346] [2021-06-05 23:56:51,906 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:56:51,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:56:51,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:56:51,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:56:52,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:56:52,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:56:52,064 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:56:52,065 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 47 treesize of output 63 [2021-06-05 23:56:52,142 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 23:56:52,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:56:52,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:56:52,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:56:52,177 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:56:52,177 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 37 treesize of output 53 [2021-06-05 23:56:52,261 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 23:56:52,291 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:56:52,330 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:56:52,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 83 [2021-06-05 23:56:52,606 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 23:56:53,040 WARN L205 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 108 [2021-06-05 23:56:53,040 INFO L628 ElimStorePlain]: treesize reduction 1472, result has 39.4 percent of original size [2021-06-05 23:56:53,220 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:56:53,220 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:53, output treesize:15 [2021-06-05 23:56:53,259 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:56:53,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354329346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:56:53,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:56:53,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-05 23:56:53,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743773006] [2021-06-05 23:56:53,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:56:53,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:56:53,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:56:53,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:56:53,260 INFO L87 Difference]: Start difference. First operand 1647 states and 5640 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:56:55,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:56:55,537 INFO L93 Difference]: Finished difference Result 2920 states and 9365 transitions. [2021-06-05 23:56:55,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 23:56:55,538 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:56:55,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:56:55,542 INFO L225 Difference]: With dead ends: 2920 [2021-06-05 23:56:55,542 INFO L226 Difference]: Without dead ends: 2886 [2021-06-05 23:56:55,542 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 978 ImplicationChecksByTransitivity, 2077.7ms TimeCoverageRelationStatistics Valid=698, Invalid=2494, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 23:56:55,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2886 states. [2021-06-05 23:56:55,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2886 to 1654. [2021-06-05 23:56:55,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1654 states, 1653 states have (on average 3.434966727162734) internal successors, (5678), 1653 states have internal predecessors, (5678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:56:55,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1654 states to 1654 states and 5678 transitions. [2021-06-05 23:56:55,567 INFO L78 Accepts]: Start accepts. Automaton has 1654 states and 5678 transitions. Word has length 26 [2021-06-05 23:56:55,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:56:55,567 INFO L482 AbstractCegarLoop]: Abstraction has 1654 states and 5678 transitions. [2021-06-05 23:56:55,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:56:55,567 INFO L276 IsEmpty]: Start isEmpty. Operand 1654 states and 5678 transitions. [2021-06-05 23:56:55,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:56:55,570 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:56:55,570 INFO L554 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] [2021-06-05 23:56:55,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3947 [2021-06-05 23:56:55,770 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:56:55,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:56:55,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1471656619, now seen corresponding path program 32 times [2021-06-05 23:56:55,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:56:55,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467714980] [2021-06-05 23:56:55,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:56:55,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:56:55,898 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:56:55,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:56:55,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467714980] [2021-06-05 23:56:55,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467714980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:56:55,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806485273] [2021-06-05 23:56:55,899 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:56:55,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:56:55,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:56:55,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:56:55,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:56:56,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:56:56,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:56:56,077 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:56:56,077 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 47 treesize of output 47 [2021-06-05 23:56:56,099 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:56:56,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:56:56,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:56:56,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:56:56,120 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:56:56,120 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 37 treesize of output 37 [2021-06-05 23:56:56,136 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:56:56,152 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:56:56,170 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:56:56,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-06-05 23:56:56,181 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 23:56:56,230 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:56:56,245 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:56:56,245 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:56, output treesize:41 [2021-06-05 23:56:56,290 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:56:56,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806485273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:56:56,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:56:56,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 23:56:56,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896246648] [2021-06-05 23:56:56,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:56:56,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:56:56,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:56:56,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:56:56,304 INFO L87 Difference]: Start difference. First operand 1654 states and 5678 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:56:57,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:56:57,233 INFO L93 Difference]: Finished difference Result 2114 states and 7070 transitions. [2021-06-05 23:56:57,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 23:56:57,233 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:56:57,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:56:57,236 INFO L225 Difference]: With dead ends: 2114 [2021-06-05 23:56:57,236 INFO L226 Difference]: Without dead ends: 2099 [2021-06-05 23:56:57,237 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 698.7ms TimeCoverageRelationStatistics Valid=168, Invalid=888, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:56:57,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2099 states. [2021-06-05 23:56:57,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2099 to 1645. [2021-06-05 23:56:57,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1645 states, 1644 states have (on average 3.431873479318735) internal successors, (5642), 1644 states have internal predecessors, (5642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:56:57,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1645 states to 1645 states and 5642 transitions. [2021-06-05 23:56:57,257 INFO L78 Accepts]: Start accepts. Automaton has 1645 states and 5642 transitions. Word has length 26 [2021-06-05 23:56:57,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:56:57,257 INFO L482 AbstractCegarLoop]: Abstraction has 1645 states and 5642 transitions. [2021-06-05 23:56:57,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:56:57,257 INFO L276 IsEmpty]: Start isEmpty. Operand 1645 states and 5642 transitions. [2021-06-05 23:56:57,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:56:57,259 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:56:57,259 INFO L554 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] [2021-06-05 23:56:57,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4081 [2021-06-05 23:56:57,461 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:56:57,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:56:57,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1471507747, now seen corresponding path program 33 times [2021-06-05 23:56:57,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:56:57,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346876411] [2021-06-05 23:56:57,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:56:57,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:56:57,594 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:56:57,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:56:57,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346876411] [2021-06-05 23:56:57,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346876411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:56:57,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084205889] [2021-06-05 23:56:57,595 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:56:57,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:56:57,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:56:57,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:56:57,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:56:57,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:56:57,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:56:57,862 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-06-05 23:56:57,864 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:56:57,873 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:56:57,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:56:57,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:56:57,877 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:56:57,880 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:56:57,888 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:56:57,897 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:56:57,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 23:56:57,899 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:56:57,907 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:56:57,909 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:56:57,909 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-05 23:56:57,925 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:56:57,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084205889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:56:57,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:56:57,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 23:56:57,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848141846] [2021-06-05 23:56:57,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:56:57,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:56:57,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:56:57,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:56:57,927 INFO L87 Difference]: Start difference. First operand 1645 states and 5642 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:56:58,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:56:58,636 INFO L93 Difference]: Finished difference Result 2294 states and 7660 transitions. [2021-06-05 23:56:58,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 23:56:58,637 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:56:58,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:56:58,640 INFO L225 Difference]: With dead ends: 2294 [2021-06-05 23:56:58,640 INFO L226 Difference]: Without dead ends: 2279 [2021-06-05 23:56:58,640 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 567.0ms TimeCoverageRelationStatistics Valid=187, Invalid=805, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:56:58,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2279 states. [2021-06-05 23:56:58,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2279 to 1647. [2021-06-05 23:56:58,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1647 states, 1646 states have (on average 3.431956257594168) internal successors, (5649), 1646 states have internal predecessors, (5649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:56:58,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1647 states to 1647 states and 5649 transitions. [2021-06-05 23:56:58,660 INFO L78 Accepts]: Start accepts. Automaton has 1647 states and 5649 transitions. Word has length 26 [2021-06-05 23:56:58,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:56:58,660 INFO L482 AbstractCegarLoop]: Abstraction has 1647 states and 5649 transitions. [2021-06-05 23:56:58,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:56:58,660 INFO L276 IsEmpty]: Start isEmpty. Operand 1647 states and 5649 transitions. [2021-06-05 23:56:58,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:56:58,662 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:56:58,662 INFO L554 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] [2021-06-05 23:56:58,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4099,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:56:58,863 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:56:58,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:56:58,863 INFO L82 PathProgramCache]: Analyzing trace with hash -146025033, now seen corresponding path program 34 times [2021-06-05 23:56:58,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:56:58,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4033557] [2021-06-05 23:56:58,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:56:58,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:56:59,015 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:56:59,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:56:59,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4033557] [2021-06-05 23:56:59,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4033557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:56:59,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544328809] [2021-06-05 23:56:59,016 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:56:59,041 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:56:59,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:56:59,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:56:59,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:56:59,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:56:59,179 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:56:59,179 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 43 treesize of output 43 [2021-06-05 23:56:59,195 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:56:59,207 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:56:59,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:56:59,215 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:56:59,215 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 35 treesize of output 35 [2021-06-05 23:56:59,232 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:56:59,247 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:56:59,265 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:56:59,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-06-05 23:56:59,270 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 23:56:59,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:56:59,327 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:56:59,327 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:54, output treesize:19 [2021-06-05 23:56:59,367 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:56:59,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544328809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:56:59,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:56:59,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 23:56:59,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247944203] [2021-06-05 23:56:59,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:56:59,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:56:59,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:56:59,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:56:59,368 INFO L87 Difference]: Start difference. First operand 1647 states and 5649 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:57:00,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:57:00,120 INFO L93 Difference]: Finished difference Result 2530 states and 8380 transitions. [2021-06-05 23:57:00,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 23:57:00,121 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:57:00,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:57:00,124 INFO L225 Difference]: With dead ends: 2530 [2021-06-05 23:57:00,124 INFO L226 Difference]: Without dead ends: 2515 [2021-06-05 23:57:00,124 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 669.5ms TimeCoverageRelationStatistics Valid=248, Invalid=942, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:57:00,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2515 states. [2021-06-05 23:57:00,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2515 to 1638. [2021-06-05 23:57:00,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1638 states, 1637 states have (on average 3.427000610873549) internal successors, (5610), 1637 states have internal predecessors, (5610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:57:00,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1638 states to 1638 states and 5610 transitions. [2021-06-05 23:57:00,145 INFO L78 Accepts]: Start accepts. Automaton has 1638 states and 5610 transitions. Word has length 26 [2021-06-05 23:57:00,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:57:00,145 INFO L482 AbstractCegarLoop]: Abstraction has 1638 states and 5610 transitions. [2021-06-05 23:57:00,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:57:00,145 INFO L276 IsEmpty]: Start isEmpty. Operand 1638 states and 5610 transitions. [2021-06-05 23:57:00,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:57:00,147 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:57:00,147 INFO L554 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] [2021-06-05 23:57:00,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4100,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:57:00,348 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:57:00,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:57:00,348 INFO L82 PathProgramCache]: Analyzing trace with hash -628905925, now seen corresponding path program 35 times [2021-06-05 23:57:00,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:57:00,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873057428] [2021-06-05 23:57:00,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:57:00,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:57:00,491 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:57:00,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:57:00,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873057428] [2021-06-05 23:57:00,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873057428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:57:00,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752174911] [2021-06-05 23:57:00,491 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:57:00,554 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:57:00,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:57:00,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:57:00,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:57:00,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:57:00,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:57:00,724 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-06-05 23:57:00,726 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:57:00,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:00,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:57:00,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:57:00,735 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:57:00,736 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:57:00,742 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:00,748 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:00,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 23:57:00,750 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:57:00,758 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:00,759 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:57:00,759 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-05 23:57:00,773 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:57:00,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752174911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:57:00,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:57:00,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 23:57:00,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595404488] [2021-06-05 23:57:00,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:57:00,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:57:00,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:57:00,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:57:00,773 INFO L87 Difference]: Start difference. First operand 1638 states and 5610 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:57:01,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:57:01,099 INFO L93 Difference]: Finished difference Result 2064 states and 6895 transitions. [2021-06-05 23:57:01,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 23:57:01,099 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:57:01,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:57:01,102 INFO L225 Difference]: With dead ends: 2064 [2021-06-05 23:57:01,102 INFO L226 Difference]: Without dead ends: 2043 [2021-06-05 23:57:01,102 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 380.0ms TimeCoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:57:01,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2043 states. [2021-06-05 23:57:01,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2043 to 1638. [2021-06-05 23:57:01,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1638 states, 1637 states have (on average 3.427000610873549) internal successors, (5610), 1637 states have internal predecessors, (5610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:57:01,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1638 states to 1638 states and 5610 transitions. [2021-06-05 23:57:01,121 INFO L78 Accepts]: Start accepts. Automaton has 1638 states and 5610 transitions. Word has length 26 [2021-06-05 23:57:01,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:57:01,122 INFO L482 AbstractCegarLoop]: Abstraction has 1638 states and 5610 transitions. [2021-06-05 23:57:01,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:57:01,122 INFO L276 IsEmpty]: Start isEmpty. Operand 1638 states and 5610 transitions. [2021-06-05 23:57:01,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:57:01,124 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:57:01,124 INFO L554 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] [2021-06-05 23:57:01,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4119,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:57:01,347 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:57:01,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:57:01,347 INFO L82 PathProgramCache]: Analyzing trace with hash -2009149475, now seen corresponding path program 36 times [2021-06-05 23:57:01,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:57:01,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599176214] [2021-06-05 23:57:01,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:57:01,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:57:01,478 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:57:01,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:57:01,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599176214] [2021-06-05 23:57:01,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599176214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:57:01,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423389555] [2021-06-05 23:57:01,479 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:57:01,504 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:57:01,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:57:01,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:57:01,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:57:01,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:57:01,680 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:01,680 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 43 treesize of output 51 [2021-06-05 23:57:01,715 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:57:01,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:01,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:57:01,750 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:01,750 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 35 treesize of output 43 [2021-06-05 23:57:01,785 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:57:01,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:01,834 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:01,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-06-05 23:57:01,839 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 23:57:01,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:01,940 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:57:01,940 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:57, output treesize:173 [2021-06-05 23:57:02,039 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:57:02,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423389555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:57:02,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:57:02,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 23:57:02,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732774440] [2021-06-05 23:57:02,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:57:02,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:57:02,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:57:02,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:57:02,040 INFO L87 Difference]: Start difference. First operand 1638 states and 5610 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:57:06,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:57:06,051 INFO L93 Difference]: Finished difference Result 2222 states and 7252 transitions. [2021-06-05 23:57:06,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 23:57:06,052 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:57:06,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:57:06,055 INFO L225 Difference]: With dead ends: 2222 [2021-06-05 23:57:06,055 INFO L226 Difference]: Without dead ends: 2184 [2021-06-05 23:57:06,055 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 906.5ms TimeCoverageRelationStatistics Valid=176, Invalid=1156, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:57:06,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2184 states. [2021-06-05 23:57:06,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2184 to 1632. [2021-06-05 23:57:06,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1632 states, 1631 states have (on average 3.4267320662170446) internal successors, (5589), 1631 states have internal predecessors, (5589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:57:06,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1632 states to 1632 states and 5589 transitions. [2021-06-05 23:57:06,087 INFO L78 Accepts]: Start accepts. Automaton has 1632 states and 5589 transitions. Word has length 26 [2021-06-05 23:57:06,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:57:06,088 INFO L482 AbstractCegarLoop]: Abstraction has 1632 states and 5589 transitions. [2021-06-05 23:57:06,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:57:06,088 INFO L276 IsEmpty]: Start isEmpty. Operand 1632 states and 5589 transitions. [2021-06-05 23:57:06,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:57:06,090 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:57:06,090 INFO L554 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] [2021-06-05 23:57:06,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4120 [2021-06-05 23:57:06,290 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:57:06,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:57:06,291 INFO L82 PathProgramCache]: Analyzing trace with hash -816683043, now seen corresponding path program 37 times [2021-06-05 23:57:06,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:57:06,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743676396] [2021-06-05 23:57:06,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:57:06,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:57:06,456 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:57:06,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:57:06,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743676396] [2021-06-05 23:57:06,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743676396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:57:06,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871591227] [2021-06-05 23:57:06,457 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:57:06,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:57:06,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:57:06,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:57:06,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:57:06,640 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:06,640 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 43 treesize of output 43 [2021-06-05 23:57:06,662 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:57:06,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:06,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:57:06,683 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:06,684 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 35 treesize of output 35 [2021-06-05 23:57:06,704 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:57:06,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:06,744 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:06,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-06-05 23:57:06,757 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 23:57:06,812 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:06,823 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:57:06,823 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:49, output treesize:15 [2021-06-05 23:57:06,860 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:57:06,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871591227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:57:06,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:57:06,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 23:57:06,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886481488] [2021-06-05 23:57:06,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 23:57:06,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:57:06,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 23:57:06,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:57:06,862 INFO L87 Difference]: Start difference. First operand 1632 states and 5589 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:57:07,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:57:07,144 INFO L93 Difference]: Finished difference Result 2129 states and 7065 transitions. [2021-06-05 23:57:07,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 23:57:07,145 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:57:07,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:57:07,148 INFO L225 Difference]: With dead ends: 2129 [2021-06-05 23:57:07,148 INFO L226 Difference]: Without dead ends: 2104 [2021-06-05 23:57:07,150 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 365.6ms TimeCoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:57:07,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2104 states. [2021-06-05 23:57:07,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2104 to 1626. [2021-06-05 23:57:07,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1626 states, 1625 states have (on average 3.420923076923077) internal successors, (5559), 1625 states have internal predecessors, (5559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:57:07,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1626 states to 1626 states and 5559 transitions. [2021-06-05 23:57:07,170 INFO L78 Accepts]: Start accepts. Automaton has 1626 states and 5559 transitions. Word has length 26 [2021-06-05 23:57:07,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:57:07,170 INFO L482 AbstractCegarLoop]: Abstraction has 1626 states and 5559 transitions. [2021-06-05 23:57:07,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:57:07,170 INFO L276 IsEmpty]: Start isEmpty. Operand 1626 states and 5559 transitions. [2021-06-05 23:57:07,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:57:07,172 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:57:07,172 INFO L554 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] [2021-06-05 23:57:07,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4170,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:57:07,373 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:57:07,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:57:07,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1649350967, now seen corresponding path program 38 times [2021-06-05 23:57:07,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:57:07,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418963987] [2021-06-05 23:57:07,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:57:07,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:57:07,551 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:57:07,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:57:07,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418963987] [2021-06-05 23:57:07,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418963987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:57:07,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037797119] [2021-06-05 23:57:07,552 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:57:07,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:57:07,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:57:07,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:57:07,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:57:07,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:57:07,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:57:07,771 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-06-05 23:57:07,773 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:57:07,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:07,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:57:07,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:57:07,785 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:57:07,787 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:57:07,795 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:07,802 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:07,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 23:57:07,804 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:57:07,814 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:07,816 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:57:07,816 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-05 23:57:07,836 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:57:07,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037797119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:57:07,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:57:07,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 23:57:07,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097548170] [2021-06-05 23:57:07,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 23:57:07,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:57:07,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 23:57:07,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:57:07,838 INFO L87 Difference]: Start difference. First operand 1626 states and 5559 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:57:08,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:57:08,154 INFO L93 Difference]: Finished difference Result 1701 states and 5724 transitions. [2021-06-05 23:57:08,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 23:57:08,155 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:57:08,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:57:08,158 INFO L225 Difference]: With dead ends: 1701 [2021-06-05 23:57:08,158 INFO L226 Difference]: Without dead ends: 1682 [2021-06-05 23:57:08,158 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 337.2ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:57:08,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1682 states. [2021-06-05 23:57:08,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1682 to 1618. [2021-06-05 23:57:08,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1618 states, 1617 states have (on average 3.419294990723562) internal successors, (5529), 1617 states have internal predecessors, (5529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:57:08,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1618 states to 1618 states and 5529 transitions. [2021-06-05 23:57:08,182 INFO L78 Accepts]: Start accepts. Automaton has 1618 states and 5529 transitions. Word has length 26 [2021-06-05 23:57:08,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:57:08,183 INFO L482 AbstractCegarLoop]: Abstraction has 1618 states and 5529 transitions. [2021-06-05 23:57:08,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:57:08,183 INFO L276 IsEmpty]: Start isEmpty. Operand 1618 states and 5529 transitions. [2021-06-05 23:57:08,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:57:08,185 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:57:08,185 INFO L554 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] [2021-06-05 23:57:08,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4188 [2021-06-05 23:57:08,386 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:57:08,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:57:08,386 INFO L82 PathProgramCache]: Analyzing trace with hash -497941569, now seen corresponding path program 39 times [2021-06-05 23:57:08,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:57:08,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249994023] [2021-06-05 23:57:08,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:57:08,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:57:08,532 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:57:08,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:57:08,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249994023] [2021-06-05 23:57:08,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249994023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:57:08,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395765503] [2021-06-05 23:57:08,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:57:08,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:57:08,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:57:08,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:57:08,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:57:10,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:57:10,137 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:10,137 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 43 treesize of output 51 [2021-06-05 23:57:10,181 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:57:10,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:10,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:57:10,212 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:10,212 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 35 treesize of output 43 [2021-06-05 23:57:10,255 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:57:10,282 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:10,304 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:10,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-06-05 23:57:10,309 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 23:57:10,365 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:10,408 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 3 xjuncts. [2021-06-05 23:57:10,408 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:57, output treesize:154 [2021-06-05 23:57:10,508 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:57:10,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395765503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:57:10,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:57:10,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 23:57:10,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461122466] [2021-06-05 23:57:10,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:57:10,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:57:10,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:57:10,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=251, Unknown=1, NotChecked=0, Total=306 [2021-06-05 23:57:10,509 INFO L87 Difference]: Start difference. First operand 1618 states and 5529 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:57:23,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:57:23,377 INFO L93 Difference]: Finished difference Result 1845 states and 6184 transitions. [2021-06-05 23:57:23,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 23:57:23,377 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:57:23,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:57:23,379 INFO L225 Difference]: With dead ends: 1845 [2021-06-05 23:57:23,379 INFO L226 Difference]: Without dead ends: 1820 [2021-06-05 23:57:23,380 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 5246.6ms TimeCoverageRelationStatistics Valid=129, Invalid=624, Unknown=3, NotChecked=0, Total=756 [2021-06-05 23:57:23,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1820 states. [2021-06-05 23:57:23,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1820 to 1600. [2021-06-05 23:57:23,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1600 states, 1599 states have (on average 3.424015009380863) internal successors, (5475), 1599 states have internal predecessors, (5475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:57:23,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 5475 transitions. [2021-06-05 23:57:23,397 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 5475 transitions. Word has length 26 [2021-06-05 23:57:23,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:57:23,397 INFO L482 AbstractCegarLoop]: Abstraction has 1600 states and 5475 transitions. [2021-06-05 23:57:23,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:57:23,397 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 5475 transitions. [2021-06-05 23:57:23,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:57:23,399 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:57:23,399 INFO L554 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] [2021-06-05 23:57:23,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4189 [2021-06-05 23:57:23,599 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:57:23,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:57:23,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1031976481, now seen corresponding path program 40 times [2021-06-05 23:57:23,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:57:23,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334558575] [2021-06-05 23:57:23,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:57:23,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:57:23,714 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:57:23,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:57:23,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334558575] [2021-06-05 23:57:23,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334558575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:57:23,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622762532] [2021-06-05 23:57:23,714 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:57:23,738 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:57:23,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:57:23,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:57:23,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:57:23,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:57:23,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:57:23,916 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-06-05 23:57:23,918 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:57:23,924 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:23,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:57:23,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:57:23,926 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:57:23,928 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:57:23,934 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:23,940 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:23,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 23:57:23,942 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:57:23,950 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:23,951 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:57:23,951 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-05 23:57:23,968 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:57:23,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622762532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:57:23,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:57:23,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 23:57:23,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264394936] [2021-06-05 23:57:23,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:57:23,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:57:23,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:57:23,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:57:23,969 INFO L87 Difference]: Start difference. First operand 1600 states and 5475 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:57:24,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:57:24,417 INFO L93 Difference]: Finished difference Result 2102 states and 6991 transitions. [2021-06-05 23:57:24,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 23:57:24,417 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:57:24,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:57:24,420 INFO L225 Difference]: With dead ends: 2102 [2021-06-05 23:57:24,420 INFO L226 Difference]: Without dead ends: 2087 [2021-06-05 23:57:24,420 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 429.4ms TimeCoverageRelationStatistics Valid=174, Invalid=696, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:57:24,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2087 states. [2021-06-05 23:57:24,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2087 to 1595. [2021-06-05 23:57:24,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1595 states, 1594 states have (on average 3.422835633626098) internal successors, (5456), 1594 states have internal predecessors, (5456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:57:24,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1595 states to 1595 states and 5456 transitions. [2021-06-05 23:57:24,440 INFO L78 Accepts]: Start accepts. Automaton has 1595 states and 5456 transitions. Word has length 26 [2021-06-05 23:57:24,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:57:24,440 INFO L482 AbstractCegarLoop]: Abstraction has 1595 states and 5456 transitions. [2021-06-05 23:57:24,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:57:24,441 INFO L276 IsEmpty]: Start isEmpty. Operand 1595 states and 5456 transitions. [2021-06-05 23:57:24,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:57:24,443 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:57:24,443 INFO L554 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] [2021-06-05 23:57:24,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4243 [2021-06-05 23:57:24,667 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:57:24,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:57:24,667 INFO L82 PathProgramCache]: Analyzing trace with hash -44484869, now seen corresponding path program 41 times [2021-06-05 23:57:24,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:57:24,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124689558] [2021-06-05 23:57:24,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:57:24,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:57:24,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:57:24,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:57:24,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124689558] [2021-06-05 23:57:24,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124689558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:57:24,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4588701] [2021-06-05 23:57:24,784 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:57:24,808 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:57:24,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:57:24,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:57:24,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:57:27,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:57:27,541 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:27,541 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 43 treesize of output 43 [2021-06-05 23:57:27,561 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:57:27,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:27,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:57:27,583 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:27,583 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 35 treesize of output 35 [2021-06-05 23:57:27,605 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:57:27,624 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:27,647 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:27,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-06-05 23:57:27,654 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 23:57:27,699 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:27,712 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:57:27,712 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:52, output treesize:40 [2021-06-05 23:57:27,753 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:57:27,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4588701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:57:27,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:57:27,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 23:57:27,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800638588] [2021-06-05 23:57:27,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 23:57:27,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:57:27,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 23:57:27,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=272, Unknown=2, NotChecked=0, Total=342 [2021-06-05 23:57:27,754 INFO L87 Difference]: Start difference. First operand 1595 states and 5456 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:57:28,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:57:28,265 INFO L93 Difference]: Finished difference Result 2234 states and 7411 transitions. [2021-06-05 23:57:28,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 23:57:28,265 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:57:28,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:57:28,268 INFO L225 Difference]: With dead ends: 2234 [2021-06-05 23:57:28,268 INFO L226 Difference]: Without dead ends: 2209 [2021-06-05 23:57:28,268 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 3095.1ms TimeCoverageRelationStatistics Valid=199, Invalid=855, Unknown=2, NotChecked=0, Total=1056 [2021-06-05 23:57:28,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2209 states. [2021-06-05 23:57:28,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2209 to 1573. [2021-06-05 23:57:28,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1573 states, 1572 states have (on average 3.422391857506361) internal successors, (5380), 1572 states have internal predecessors, (5380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:57:28,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1573 states to 1573 states and 5380 transitions. [2021-06-05 23:57:28,289 INFO L78 Accepts]: Start accepts. Automaton has 1573 states and 5380 transitions. Word has length 26 [2021-06-05 23:57:28,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:57:28,289 INFO L482 AbstractCegarLoop]: Abstraction has 1573 states and 5380 transitions. [2021-06-05 23:57:28,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:57:28,289 INFO L276 IsEmpty]: Start isEmpty. Operand 1573 states and 5380 transitions. [2021-06-05 23:57:28,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:57:28,291 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:57:28,291 INFO L554 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] [2021-06-05 23:57:28,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4244 [2021-06-05 23:57:28,492 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:57:28,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:57:28,492 INFO L82 PathProgramCache]: Analyzing trace with hash -987079049, now seen corresponding path program 42 times [2021-06-05 23:57:28,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:57:28,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771807604] [2021-06-05 23:57:28,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:57:28,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:57:28,618 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:57:28,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:57:28,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771807604] [2021-06-05 23:57:28,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771807604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:57:28,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637809457] [2021-06-05 23:57:28,619 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:57:28,643 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:57:28,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:57:28,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:57:28,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:57:28,805 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:28,805 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 43 treesize of output 51 [2021-06-05 23:57:28,841 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:57:28,858 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:28,870 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:28,870 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 35 treesize of output 43 [2021-06-05 23:57:28,913 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:57:28,939 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:28,961 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:28,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-06-05 23:57:28,971 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 23:57:29,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:29,084 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:57:29,084 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:59, output treesize:116 [2021-06-05 23:57:29,157 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:57:29,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637809457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:57:29,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:57:29,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 23:57:29,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403053174] [2021-06-05 23:57:29,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 23:57:29,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:57:29,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 23:57:29,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:57:29,158 INFO L87 Difference]: Start difference. First operand 1573 states and 5380 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 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) [2021-06-05 23:57:29,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:57:29,670 INFO L93 Difference]: Finished difference Result 2054 states and 6859 transitions. [2021-06-05 23:57:29,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 23:57:29,671 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 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 26 [2021-06-05 23:57:29,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:57:29,673 INFO L225 Difference]: With dead ends: 2054 [2021-06-05 23:57:29,673 INFO L226 Difference]: Without dead ends: 2039 [2021-06-05 23:57:29,674 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 519.1ms TimeCoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:57:29,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2039 states. [2021-06-05 23:57:29,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2039 to 1618. [2021-06-05 23:57:29,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1618 states, 1617 states have (on average 3.4162028447742734) internal successors, (5524), 1617 states have internal predecessors, (5524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:57:29,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1618 states to 1618 states and 5524 transitions. [2021-06-05 23:57:29,692 INFO L78 Accepts]: Start accepts. Automaton has 1618 states and 5524 transitions. Word has length 26 [2021-06-05 23:57:29,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:57:29,692 INFO L482 AbstractCegarLoop]: Abstraction has 1618 states and 5524 transitions. [2021-06-05 23:57:29,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 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) [2021-06-05 23:57:29,692 INFO L276 IsEmpty]: Start isEmpty. Operand 1618 states and 5524 transitions. [2021-06-05 23:57:29,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:57:29,694 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:57:29,694 INFO L554 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] [2021-06-05 23:57:29,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4263 [2021-06-05 23:57:29,894 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:57:29,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:57:29,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1154888141, now seen corresponding path program 43 times [2021-06-05 23:57:29,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:57:29,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230887159] [2021-06-05 23:57:29,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:57:29,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:57:30,006 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:57:30,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:57:30,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230887159] [2021-06-05 23:57:30,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230887159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:57:30,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21952487] [2021-06-05 23:57:30,006 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:57:30,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:57:30,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:57:30,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:57:30,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:57:30,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:57:30,200 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-06-05 23:57:30,202 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:57:30,209 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:30,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:57:30,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:57:30,211 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:57:30,213 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:57:30,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:30,225 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:30,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 23:57:30,230 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:57:30,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:30,240 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:57:30,240 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-05 23:57:30,258 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:57:30,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21952487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:57:30,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:57:30,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 23:57:30,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44416167] [2021-06-05 23:57:30,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:57:30,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:57:30,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:57:30,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:57:30,259 INFO L87 Difference]: Start difference. First operand 1618 states and 5524 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:57:30,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:57:30,946 INFO L93 Difference]: Finished difference Result 2315 states and 7658 transitions. [2021-06-05 23:57:30,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 23:57:30,946 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:57:30,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:57:30,949 INFO L225 Difference]: With dead ends: 2315 [2021-06-05 23:57:30,949 INFO L226 Difference]: Without dead ends: 2300 [2021-06-05 23:57:30,949 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 575.4ms TimeCoverageRelationStatistics Valid=200, Invalid=792, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:57:30,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2300 states. [2021-06-05 23:57:30,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2300 to 1619. [2021-06-05 23:57:30,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1619 states, 1618 states have (on average 3.417799752781211) internal successors, (5530), 1618 states have internal predecessors, (5530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:57:30,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1619 states to 1619 states and 5530 transitions. [2021-06-05 23:57:30,970 INFO L78 Accepts]: Start accepts. Automaton has 1619 states and 5530 transitions. Word has length 26 [2021-06-05 23:57:30,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:57:30,970 INFO L482 AbstractCegarLoop]: Abstraction has 1619 states and 5530 transitions. [2021-06-05 23:57:30,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:57:30,970 INFO L276 IsEmpty]: Start isEmpty. Operand 1619 states and 5530 transitions. [2021-06-05 23:57:30,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:57:30,972 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:57:30,972 INFO L554 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] [2021-06-05 23:57:31,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4319,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:57:31,173 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:57:31,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:57:31,173 INFO L82 PathProgramCache]: Analyzing trace with hash -856114693, now seen corresponding path program 44 times [2021-06-05 23:57:31,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:57:31,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859574353] [2021-06-05 23:57:31,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:57:31,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:57:31,291 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:57:31,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:57:31,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859574353] [2021-06-05 23:57:31,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859574353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:57:31,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053911135] [2021-06-05 23:57:31,292 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:57:31,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:57:31,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:57:31,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:57:31,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:57:31,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:57:31,460 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:31,460 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 43 treesize of output 51 [2021-06-05 23:57:31,504 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:57:31,522 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:31,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:57:31,536 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:31,536 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 35 treesize of output 43 [2021-06-05 23:57:31,578 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:57:31,605 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:31,628 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:31,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-06-05 23:57:31,638 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 23:57:31,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:31,760 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 4 xjuncts. [2021-06-05 23:57:31,761 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:59, output treesize:97 [2021-06-05 23:57:31,833 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:57:31,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053911135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:57:31,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:57:31,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 23:57:31,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535113232] [2021-06-05 23:57:31,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:57:31,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:57:31,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:57:31,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:57:31,834 INFO L87 Difference]: Start difference. First operand 1619 states and 5530 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:57:32,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:57:32,163 INFO L93 Difference]: Finished difference Result 2120 states and 7093 transitions. [2021-06-05 23:57:32,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 23:57:32,164 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:57:32,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:57:32,166 INFO L225 Difference]: With dead ends: 2120 [2021-06-05 23:57:32,166 INFO L226 Difference]: Without dead ends: 2105 [2021-06-05 23:57:32,166 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 414.1ms TimeCoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:57:32,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2105 states. [2021-06-05 23:57:32,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2105 to 1622. [2021-06-05 23:57:32,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1622 states, 1621 states have (on average 3.421344848858729) internal successors, (5546), 1621 states have internal predecessors, (5546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:57:32,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 5546 transitions. [2021-06-05 23:57:32,185 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 5546 transitions. Word has length 26 [2021-06-05 23:57:32,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:57:32,185 INFO L482 AbstractCegarLoop]: Abstraction has 1622 states and 5546 transitions. [2021-06-05 23:57:32,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:57:32,185 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 5546 transitions. [2021-06-05 23:57:32,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:57:32,187 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:57:32,187 INFO L554 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] [2021-06-05 23:57:32,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4320 [2021-06-05 23:57:32,397 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:57:32,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:57:32,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1488441339, now seen corresponding path program 45 times [2021-06-05 23:57:32,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:57:32,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743476922] [2021-06-05 23:57:32,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:57:32,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:57:32,510 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:57:32,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:57:32,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743476922] [2021-06-05 23:57:32,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743476922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:57:32,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362498713] [2021-06-05 23:57:32,510 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:57:32,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:57:32,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:57:32,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:57:32,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:57:33,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:57:33,589 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:33,589 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 43 treesize of output 51 [2021-06-05 23:57:33,632 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:57:33,650 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:33,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:57:33,663 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:33,664 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 35 treesize of output 43 [2021-06-05 23:57:33,698 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:57:33,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:33,748 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:33,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-06-05 23:57:33,758 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 23:57:33,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:33,881 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 5 xjuncts. [2021-06-05 23:57:33,882 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:59, output treesize:229 [2021-06-05 23:57:33,969 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:57:33,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362498713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:57:33,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:57:33,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 23:57:33,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032216734] [2021-06-05 23:57:33,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:57:33,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:57:33,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:57:33,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=231, Unknown=1, NotChecked=0, Total=306 [2021-06-05 23:57:33,970 INFO L87 Difference]: Start difference. First operand 1622 states and 5546 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:57:34,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:57:34,291 INFO L93 Difference]: Finished difference Result 2150 states and 7189 transitions. [2021-06-05 23:57:34,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 23:57:34,292 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:57:34,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:57:34,294 INFO L225 Difference]: With dead ends: 2150 [2021-06-05 23:57:34,294 INFO L226 Difference]: Without dead ends: 2135 [2021-06-05 23:57:34,294 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 1329.5ms TimeCoverageRelationStatistics Valid=150, Invalid=499, Unknown=1, NotChecked=0, Total=650 [2021-06-05 23:57:34,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2135 states. [2021-06-05 23:57:34,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2135 to 1640. [2021-06-05 23:57:34,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1640 states, 1639 states have (on average 3.416717510677242) internal successors, (5600), 1639 states have internal predecessors, (5600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:57:34,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1640 states to 1640 states and 5600 transitions. [2021-06-05 23:57:34,314 INFO L78 Accepts]: Start accepts. Automaton has 1640 states and 5600 transitions. Word has length 26 [2021-06-05 23:57:34,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:57:34,314 INFO L482 AbstractCegarLoop]: Abstraction has 1640 states and 5600 transitions. [2021-06-05 23:57:34,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:57:34,314 INFO L276 IsEmpty]: Start isEmpty. Operand 1640 states and 5600 transitions. [2021-06-05 23:57:34,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:57:34,316 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:57:34,316 INFO L554 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] [2021-06-05 23:57:34,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4377,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:57:34,517 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:57:34,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:57:34,517 INFO L82 PathProgramCache]: Analyzing trace with hash -2007184673, now seen corresponding path program 46 times [2021-06-05 23:57:34,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:57:34,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376571011] [2021-06-05 23:57:34,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:57:34,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:57:34,631 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:57:34,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:57:34,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376571011] [2021-06-05 23:57:34,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376571011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:57:34,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248000238] [2021-06-05 23:57:34,631 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:57:34,655 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:57:34,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:57:34,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:57:34,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:57:34,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:57:34,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:57:34,839 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2021-06-05 23:57:34,840 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:57:34,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:34,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:57:34,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:57:34,849 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-06-05 23:57:34,851 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:57:34,857 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:34,863 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:34,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 23:57:34,864 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:57:34,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:34,874 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:57:34,874 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:49, output treesize:3 [2021-06-05 23:57:34,890 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:57:34,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248000238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:57:34,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:57:34,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 23:57:34,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941991102] [2021-06-05 23:57:34,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:57:34,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:57:34,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:57:34,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:57:34,891 INFO L87 Difference]: Start difference. First operand 1640 states and 5600 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:57:35,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:57:35,295 INFO L93 Difference]: Finished difference Result 2076 states and 6950 transitions. [2021-06-05 23:57:35,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 23:57:35,296 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:57:35,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:57:35,298 INFO L225 Difference]: With dead ends: 2076 [2021-06-05 23:57:35,298 INFO L226 Difference]: Without dead ends: 2061 [2021-06-05 23:57:35,298 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 421.2ms TimeCoverageRelationStatistics Valid=163, Invalid=649, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:57:35,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2061 states. [2021-06-05 23:57:35,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2061 to 1661. [2021-06-05 23:57:35,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1661 states, 1660 states have (on average 3.4126506024096384) internal successors, (5665), 1660 states have internal predecessors, (5665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:57:35,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1661 states to 1661 states and 5665 transitions. [2021-06-05 23:57:35,318 INFO L78 Accepts]: Start accepts. Automaton has 1661 states and 5665 transitions. Word has length 26 [2021-06-05 23:57:35,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:57:35,318 INFO L482 AbstractCegarLoop]: Abstraction has 1661 states and 5665 transitions. [2021-06-05 23:57:35,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:57:35,318 INFO L276 IsEmpty]: Start isEmpty. Operand 1661 states and 5665 transitions. [2021-06-05 23:57:35,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:57:35,320 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:57:35,320 INFO L554 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] [2021-06-05 23:57:35,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4433,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:57:35,521 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:57:35,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:57:35,521 INFO L82 PathProgramCache]: Analyzing trace with hash 670249843, now seen corresponding path program 47 times [2021-06-05 23:57:35,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:57:35,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390538347] [2021-06-05 23:57:35,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:57:35,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:57:35,646 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:57:35,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:57:35,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390538347] [2021-06-05 23:57:35,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390538347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:57:35,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725269739] [2021-06-05 23:57:35,646 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:57:35,670 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:57:35,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:57:35,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:57:35,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:57:35,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:57:35,852 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:35,852 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 43 treesize of output 43 [2021-06-05 23:57:35,868 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:57:35,880 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:35,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:57:35,887 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:35,887 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 35 treesize of output 35 [2021-06-05 23:57:35,903 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:57:35,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:35,936 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:35,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-06-05 23:57:35,946 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 23:57:35,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:36,006 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:57:36,007 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:52, output treesize:19 [2021-06-05 23:57:36,047 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:57:36,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725269739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:57:36,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:57:36,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 23:57:36,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807646891] [2021-06-05 23:57:36,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 23:57:36,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:57:36,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 23:57:36,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:57:36,048 INFO L87 Difference]: Start difference. First operand 1661 states and 5665 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:57:36,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:57:36,670 INFO L93 Difference]: Finished difference Result 2366 states and 7851 transitions. [2021-06-05 23:57:36,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 23:57:36,670 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:57:36,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:57:36,674 INFO L225 Difference]: With dead ends: 2366 [2021-06-05 23:57:36,674 INFO L226 Difference]: Without dead ends: 2351 [2021-06-05 23:57:36,674 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 553.4ms TimeCoverageRelationStatistics Valid=232, Invalid=890, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 23:57:36,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2351 states. [2021-06-05 23:57:36,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2351 to 1658. [2021-06-05 23:57:36,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1658 states, 1657 states have (on average 3.4140012070006036) internal successors, (5657), 1657 states have internal predecessors, (5657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:57:36,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1658 states to 1658 states and 5657 transitions. [2021-06-05 23:57:36,695 INFO L78 Accepts]: Start accepts. Automaton has 1658 states and 5657 transitions. Word has length 26 [2021-06-05 23:57:36,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:57:36,695 INFO L482 AbstractCegarLoop]: Abstraction has 1658 states and 5657 transitions. [2021-06-05 23:57:36,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:57:36,695 INFO L276 IsEmpty]: Start isEmpty. Operand 1658 states and 5657 transitions. [2021-06-05 23:57:36,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:57:36,697 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:57:36,697 INFO L554 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] [2021-06-05 23:57:36,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4434,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:57:36,897 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:57:36,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:57:36,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1019693061, now seen corresponding path program 48 times [2021-06-05 23:57:36,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:57:36,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913556605] [2021-06-05 23:57:36,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:57:36,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:57:37,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:57:37,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:57:37,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913556605] [2021-06-05 23:57:37,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913556605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:57:37,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339250185] [2021-06-05 23:57:37,002 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:57:37,027 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:57:37,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:57:37,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:57:37,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:57:37,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:57:37,146 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:37,146 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 43 treesize of output 43 [2021-06-05 23:57:37,163 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:57:37,173 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:37,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:57:37,180 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:37,180 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 35 treesize of output 35 [2021-06-05 23:57:37,197 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:57:37,210 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:37,228 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:37,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-06-05 23:57:37,233 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 23:57:37,273 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:37,283 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:57:37,283 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:49, output treesize:15 [2021-06-05 23:57:37,323 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:57:37,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339250185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:57:37,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:57:37,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 23:57:37,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558199884] [2021-06-05 23:57:37,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:57:37,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:57:37,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:57:37,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:57:37,324 INFO L87 Difference]: Start difference. First operand 1658 states and 5657 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:57:37,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:57:37,807 INFO L93 Difference]: Finished difference Result 2228 states and 7412 transitions. [2021-06-05 23:57:37,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 23:57:37,807 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:57:37,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:57:37,810 INFO L225 Difference]: With dead ends: 2228 [2021-06-05 23:57:37,810 INFO L226 Difference]: Without dead ends: 2203 [2021-06-05 23:57:37,810 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 448.6ms TimeCoverageRelationStatistics Valid=165, Invalid=647, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:57:37,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2203 states. [2021-06-05 23:57:37,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2203 to 1658. [2021-06-05 23:57:37,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1658 states, 1657 states have (on average 3.4164152082076042) internal successors, (5661), 1657 states have internal predecessors, (5661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:57:37,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1658 states to 1658 states and 5661 transitions. [2021-06-05 23:57:37,830 INFO L78 Accepts]: Start accepts. Automaton has 1658 states and 5661 transitions. Word has length 26 [2021-06-05 23:57:37,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:57:37,830 INFO L482 AbstractCegarLoop]: Abstraction has 1658 states and 5661 transitions. [2021-06-05 23:57:37,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:57:37,830 INFO L276 IsEmpty]: Start isEmpty. Operand 1658 states and 5661 transitions. [2021-06-05 23:57:37,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:57:37,832 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:57:37,832 INFO L554 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] [2021-06-05 23:57:38,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4453 [2021-06-05 23:57:38,034 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:57:38,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:57:38,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1464847671, now seen corresponding path program 49 times [2021-06-05 23:57:38,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:57:38,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217277663] [2021-06-05 23:57:38,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:57:38,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:57:38,171 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:57:38,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:57:38,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217277663] [2021-06-05 23:57:38,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217277663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:57:38,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871027374] [2021-06-05 23:57:38,172 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:57:38,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:57:38,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:57:38,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:57:39,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:57:40,004 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:40,004 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 43 treesize of output 43 [2021-06-05 23:57:40,021 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:57:40,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:40,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:57:40,041 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:40,041 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 35 treesize of output 35 [2021-06-05 23:57:40,058 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:57:40,074 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:40,092 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:40,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-06-05 23:57:40,097 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 23:57:40,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:40,155 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:57:40,155 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:54, output treesize:36 [2021-06-05 23:57:40,196 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:57:40,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871027374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:57:40,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:57:40,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 23:57:40,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882931790] [2021-06-05 23:57:40,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:57:40,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:57:40,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:57:40,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=233, Unknown=1, NotChecked=0, Total=306 [2021-06-05 23:57:40,197 INFO L87 Difference]: Start difference. First operand 1658 states and 5661 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:57:51,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:57:51,626 INFO L93 Difference]: Finished difference Result 2151 states and 7200 transitions. [2021-06-05 23:57:51,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 23:57:51,626 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:57:51,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:57:51,629 INFO L225 Difference]: With dead ends: 2151 [2021-06-05 23:57:51,629 INFO L226 Difference]: Without dead ends: 2136 [2021-06-05 23:57:51,630 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 2002.5ms TimeCoverageRelationStatistics Valid=143, Invalid=506, Unknown=1, NotChecked=0, Total=650 [2021-06-05 23:57:51,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2136 states. [2021-06-05 23:57:51,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2136 to 1658. [2021-06-05 23:57:51,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1658 states, 1657 states have (on average 3.4164152082076042) internal successors, (5661), 1657 states have internal predecessors, (5661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:57:51,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1658 states to 1658 states and 5661 transitions. [2021-06-05 23:57:51,650 INFO L78 Accepts]: Start accepts. Automaton has 1658 states and 5661 transitions. Word has length 26 [2021-06-05 23:57:51,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:57:51,650 INFO L482 AbstractCegarLoop]: Abstraction has 1658 states and 5661 transitions. [2021-06-05 23:57:51,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:57:51,650 INFO L276 IsEmpty]: Start isEmpty. Operand 1658 states and 5661 transitions. [2021-06-05 23:57:51,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:57:51,652 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:57:51,652 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:57:51,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4470 [2021-06-05 23:57:51,853 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:57:51,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:57:51,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1829221231, now seen corresponding path program 56 times [2021-06-05 23:57:51,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:57:51,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688215364] [2021-06-05 23:57:51,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:57:51,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:57:52,032 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:57:52,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:57:52,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688215364] [2021-06-05 23:57:52,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688215364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:57:52,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667768143] [2021-06-05 23:57:52,033 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:57:52,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:57:52,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:57:52,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 23:57:52,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:57:52,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:57:52,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:57:52,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:57:52,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-06-05 23:57:52,182 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:57:52,191 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:52,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:57:52,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:57:52,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:57:52,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 23:57:52,197 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:57:52,205 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:52,212 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:52,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 23:57:52,213 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:57:52,224 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:52,225 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:57:52,225 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:59, output treesize:10 [2021-06-05 23:57:52,257 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:57:52,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667768143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:57:52,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:57:52,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 23:57:52,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099680390] [2021-06-05 23:57:52,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:57:52,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:57:52,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:57:52,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:57:52,258 INFO L87 Difference]: Start difference. First operand 1658 states and 5661 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:57:52,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:57:52,654 INFO L93 Difference]: Finished difference Result 2204 states and 7221 transitions. [2021-06-05 23:57:52,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 23:57:52,654 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:57:52,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:57:52,657 INFO L225 Difference]: With dead ends: 2204 [2021-06-05 23:57:52,657 INFO L226 Difference]: Without dead ends: 2152 [2021-06-05 23:57:52,658 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 498.8ms TimeCoverageRelationStatistics Valid=191, Invalid=739, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:57:52,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2021-06-05 23:57:52,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 1676. [2021-06-05 23:57:52,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1676 states, 1675 states have (on average 3.4077611940298507) internal successors, (5708), 1675 states have internal predecessors, (5708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:57:52,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 5708 transitions. [2021-06-05 23:57:52,677 INFO L78 Accepts]: Start accepts. Automaton has 1676 states and 5708 transitions. Word has length 26 [2021-06-05 23:57:52,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:57:52,677 INFO L482 AbstractCegarLoop]: Abstraction has 1676 states and 5708 transitions. [2021-06-05 23:57:52,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:57:52,677 INFO L276 IsEmpty]: Start isEmpty. Operand 1676 states and 5708 transitions. [2021-06-05 23:57:52,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:57:52,679 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:57:52,679 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:57:52,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4489,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:57:52,880 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:57:52,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:57:52,880 INFO L82 PathProgramCache]: Analyzing trace with hash 554911219, now seen corresponding path program 57 times [2021-06-05 23:57:52,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:57:52,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512492228] [2021-06-05 23:57:52,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:57:52,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:57:53,063 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:57:53,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:57:53,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512492228] [2021-06-05 23:57:53,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512492228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:57:53,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566523539] [2021-06-05 23:57:53,063 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:57:53,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:57:53,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:57:53,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:57:53,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:57:55,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:57:55,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:57:55,613 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:55,613 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 51 treesize of output 69 [2021-06-05 23:57:55,697 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 23:57:55,718 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:55,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:57:55,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:57:55,735 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:55,735 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 39 treesize of output 57 [2021-06-05 23:57:55,813 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 23:57:55,845 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:55,884 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:57:55,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 83 [2021-06-05 23:57:56,064 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 23:57:56,702 WARN L205 SmtUtils]: Spent 637.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 118 [2021-06-05 23:57:56,703 INFO L628 ElimStorePlain]: treesize reduction 632, result has 68.1 percent of original size [2021-06-05 23:57:57,024 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:57:57,024 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:62, output treesize:63 [2021-06-05 23:57:57,076 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:57:57,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566523539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:57:57,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:57:57,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 23:57:57,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477274507] [2021-06-05 23:57:57,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 23:57:57,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:57:57,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 23:57:57,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=277, Unknown=2, NotChecked=0, Total=342 [2021-06-05 23:57:57,077 INFO L87 Difference]: Start difference. First operand 1676 states and 5708 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:59:01,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:59:01,924 INFO L93 Difference]: Finished difference Result 2373 states and 7814 transitions. [2021-06-05 23:59:01,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 23:59:01,924 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:59:01,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:59:01,927 INFO L225 Difference]: With dead ends: 2373 [2021-06-05 23:59:01,927 INFO L226 Difference]: Without dead ends: 2358 [2021-06-05 23:59:01,928 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 25362.0ms TimeCoverageRelationStatistics Valid=360, Invalid=1785, Unknown=17, NotChecked=0, Total=2162 [2021-06-05 23:59:01,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2358 states. [2021-06-05 23:59:01,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2358 to 1672. [2021-06-05 23:59:01,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1672 states, 1671 states have (on average 3.40754039497307) internal successors, (5694), 1671 states have internal predecessors, (5694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:59:01,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1672 states to 1672 states and 5694 transitions. [2021-06-05 23:59:01,947 INFO L78 Accepts]: Start accepts. Automaton has 1672 states and 5694 transitions. Word has length 26 [2021-06-05 23:59:01,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:59:01,947 INFO L482 AbstractCegarLoop]: Abstraction has 1672 states and 5694 transitions. [2021-06-05 23:59:01,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:59:01,947 INFO L276 IsEmpty]: Start isEmpty. Operand 1672 states and 5694 transitions. [2021-06-05 23:59:01,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:59:01,949 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:59:01,949 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:59:02,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4490,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:59:02,150 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:59:02,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:59:02,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1130156151, now seen corresponding path program 58 times [2021-06-05 23:59:02,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:59:02,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851021445] [2021-06-05 23:59:02,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:59:02,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:59:02,278 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:59:02,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:59:02,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851021445] [2021-06-05 23:59:02,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851021445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:59:02,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518275643] [2021-06-05 23:59:02,278 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:59:02,305 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:59:02,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:59:02,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:59:02,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:59:02,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:59:02,487 INFO L354 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2021-06-05 23:59:02,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 237 treesize of output 217 [2021-06-05 23:59:02,556 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 23:59:02,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:59:02,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:59:02,607 INFO L354 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2021-06-05 23:59:02,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 221 treesize of output 195 [2021-06-05 23:59:02,772 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 23:59:02,807 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:59:02,836 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:59:02,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 193 treesize of output 177 [2021-06-05 23:59:03,075 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:59:03,576 WARN L205 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 125 [2021-06-05 23:59:03,576 INFO L628 ElimStorePlain]: treesize reduction 178, result has 90.9 percent of original size [2021-06-05 23:59:03,776 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 148 [2021-06-05 23:59:04,002 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:59:04,002 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:242, output treesize:27 [2021-06-05 23:59:04,038 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:59:04,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518275643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:59:04,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:59:04,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 23:59:04,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167290161] [2021-06-05 23:59:04,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 23:59:04,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:59:04,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 23:59:04,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 23:59:04,039 INFO L87 Difference]: Start difference. First operand 1672 states and 5694 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:59:04,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:59:04,758 INFO L93 Difference]: Finished difference Result 2003 states and 6539 transitions. [2021-06-05 23:59:04,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 23:59:04,758 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:59:04,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:59:04,761 INFO L225 Difference]: With dead ends: 2003 [2021-06-05 23:59:04,761 INFO L226 Difference]: Without dead ends: 1981 [2021-06-05 23:59:04,761 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 702.1ms TimeCoverageRelationStatistics Valid=202, Invalid=1058, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:59:04,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1981 states. [2021-06-05 23:59:04,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1981 to 1674. [2021-06-05 23:59:04,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1674 states, 1673 states have (on average 3.4076509264793784) internal successors, (5701), 1673 states have internal predecessors, (5701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:59:04,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 5701 transitions. [2021-06-05 23:59:04,781 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 5701 transitions. Word has length 26 [2021-06-05 23:59:04,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:59:04,781 INFO L482 AbstractCegarLoop]: Abstraction has 1674 states and 5701 transitions. [2021-06-05 23:59:04,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:59:04,781 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 5701 transitions. [2021-06-05 23:59:04,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:59:04,783 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:59:04,783 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:59:04,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4602,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:59:04,984 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:59:04,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:59:04,984 INFO L82 PathProgramCache]: Analyzing trace with hash -2096936581, now seen corresponding path program 59 times [2021-06-05 23:59:04,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:59:04,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757240341] [2021-06-05 23:59:04,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:59:04,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:59:05,153 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:59:05,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:59:05,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757240341] [2021-06-05 23:59:05,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757240341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:59:05,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565896811] [2021-06-05 23:59:05,153 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:59:05,180 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:59:05,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:59:05,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:59:05,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:59:06,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:59:06,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:59:06,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:59:06,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:59:06,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-06-05 23:59:06,142 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:59:06,149 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:59:06,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:59:06,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:59:06,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:59:06,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:59:06,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 23:59:06,154 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:59:06,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:59:06,166 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:59:06,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 23:59:06,168 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:59:06,176 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:59:06,177 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:59:06,177 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-05 23:59:06,198 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:59:06,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565896811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:59:06,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:59:06,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2021-06-05 23:59:06,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239110158] [2021-06-05 23:59:06,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 23:59:06,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:59:06,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 23:59:06,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=182, Unknown=1, NotChecked=0, Total=240 [2021-06-05 23:59:06,199 INFO L87 Difference]: Start difference. First operand 1674 states and 5701 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:59:09,353 WARN L205 SmtUtils]: Spent 820.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-06-05 23:59:10,256 WARN L205 SmtUtils]: Spent 889.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-06-05 23:59:12,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:59:12,868 INFO L93 Difference]: Finished difference Result 2047 states and 6837 transitions. [2021-06-05 23:59:12,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 23:59:12,868 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:59:12,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:59:12,871 INFO L225 Difference]: With dead ends: 2047 [2021-06-05 23:59:12,871 INFO L226 Difference]: Without dead ends: 2016 [2021-06-05 23:59:12,871 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 2948.8ms TimeCoverageRelationStatistics Valid=152, Invalid=549, Unknown=1, NotChecked=0, Total=702 [2021-06-05 23:59:12,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2016 states. [2021-06-05 23:59:12,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2016 to 1680. [2021-06-05 23:59:12,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1680 states, 1679 states have (on average 3.405598570577725) internal successors, (5718), 1679 states have internal predecessors, (5718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:59:12,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 5718 transitions. [2021-06-05 23:59:12,889 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 5718 transitions. Word has length 26 [2021-06-05 23:59:12,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:59:12,889 INFO L482 AbstractCegarLoop]: Abstraction has 1680 states and 5718 transitions. [2021-06-05 23:59:12,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:59:12,889 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 5718 transitions. [2021-06-05 23:59:12,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:59:12,891 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:59:12,891 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:59:13,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4721,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:59:13,092 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:59:13,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:59:13,092 INFO L82 PathProgramCache]: Analyzing trace with hash 540764283, now seen corresponding path program 60 times [2021-06-05 23:59:13,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:59:13,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617726442] [2021-06-05 23:59:13,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:59:13,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:59:13,264 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:59:13,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:59:13,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617726442] [2021-06-05 23:59:13,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617726442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:59:13,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800536812] [2021-06-05 23:59:13,265 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:59:13,289 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:59:13,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:59:13,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:59:13,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:59:16,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:59:16,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:59:16,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:59:16,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:59:16,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-06-05 23:59:16,131 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:59:16,138 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:59:16,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:59:16,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:59:16,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:59:16,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:59:16,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 23:59:16,144 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 23:59:16,150 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:59:16,157 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:59:16,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-05 23:59:16,158 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:59:16,166 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:59:16,167 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:59:16,167 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-05 23:59:16,186 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:59:16,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800536812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:59:16,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:59:16,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-05 23:59:16,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183393511] [2021-06-05 23:59:16,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 23:59:16,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:59:16,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 23:59:16,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=212, Unknown=3, NotChecked=0, Total=272 [2021-06-05 23:59:16,187 INFO L87 Difference]: Start difference. First operand 1680 states and 5718 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:59:31,061 WARN L205 SmtUtils]: Spent 1.66 s on a formula simplification that was a NOOP. DAG size: 43 [2021-06-05 23:59:33,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:59:33,633 INFO L93 Difference]: Finished difference Result 2079 states and 6921 transitions. [2021-06-05 23:59:33,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 23:59:33,634 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:59:33,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:59:33,636 INFO L225 Difference]: With dead ends: 2079 [2021-06-05 23:59:33,636 INFO L226 Difference]: Without dead ends: 2064 [2021-06-05 23:59:33,637 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 7264.6ms TimeCoverageRelationStatistics Valid=158, Invalid=592, Unknown=6, NotChecked=0, Total=756 [2021-06-05 23:59:33,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2064 states. [2021-06-05 23:59:33,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2064 to 1680. [2021-06-05 23:59:33,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1680 states, 1679 states have (on average 3.405598570577725) internal successors, (5718), 1679 states have internal predecessors, (5718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:59:33,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 5718 transitions. [2021-06-05 23:59:33,656 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 5718 transitions. Word has length 26 [2021-06-05 23:59:33,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:59:33,656 INFO L482 AbstractCegarLoop]: Abstraction has 1680 states and 5718 transitions. [2021-06-05 23:59:33,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:59:33,656 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 5718 transitions. [2021-06-05 23:59:33,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:59:33,658 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:59:33,658 INFO L554 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] [2021-06-05 23:59:33,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4722 [2021-06-05 23:59:33,858 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:59:33,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:59:33,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1112511237, now seen corresponding path program 50 times [2021-06-05 23:59:33,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:59:33,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266189953] [2021-06-05 23:59:33,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:59:33,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:59:34,094 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:59:34,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:59:34,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266189953] [2021-06-05 23:59:34,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266189953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:59:34,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927710508] [2021-06-05 23:59:34,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:59:34,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:59:34,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:59:34,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:59:34,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:59:34,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:59:34,240 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:59:34,241 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 43 treesize of output 43 [2021-06-05 23:59:34,258 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:59:34,268 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:59:34,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:59:34,275 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:59:34,276 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 35 treesize of output 35 [2021-06-05 23:59:34,293 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:59:34,307 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:59:34,326 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:59:34,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-06-05 23:59:34,336 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 23:59:34,384 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:59:34,398 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:59:34,398 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:49, output treesize:15 [2021-06-05 23:59:34,444 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:59:34,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927710508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:59:34,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:59:34,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 23:59:34,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009894806] [2021-06-05 23:59:34,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:59:34,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:59:34,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:59:34,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:59:34,445 INFO L87 Difference]: Start difference. First operand 1680 states and 5718 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:59:35,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:59:35,677 INFO L93 Difference]: Finished difference Result 2348 states and 7703 transitions. [2021-06-05 23:59:35,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 23:59:35,678 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:59:35,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:59:35,682 INFO L225 Difference]: With dead ends: 2348 [2021-06-05 23:59:35,682 INFO L226 Difference]: Without dead ends: 2333 [2021-06-05 23:59:35,683 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 1012.0ms TimeCoverageRelationStatistics Valid=282, Invalid=1358, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 23:59:35,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2333 states. [2021-06-05 23:59:35,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2333 to 1687. [2021-06-05 23:59:35,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1687 states, 1686 states have (on average 3.4056939501779357) internal successors, (5742), 1686 states have internal predecessors, (5742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:59:35,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1687 states to 1687 states and 5742 transitions. [2021-06-05 23:59:35,706 INFO L78 Accepts]: Start accepts. Automaton has 1687 states and 5742 transitions. Word has length 26 [2021-06-05 23:59:35,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:59:35,706 INFO L482 AbstractCegarLoop]: Abstraction has 1687 states and 5742 transitions. [2021-06-05 23:59:35,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:59:35,706 INFO L276 IsEmpty]: Start isEmpty. Operand 1687 states and 5742 transitions. [2021-06-05 23:59:35,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:59:35,708 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:59:35,708 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:59:35,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4723,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:59:35,909 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:59:35,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:59:35,909 INFO L82 PathProgramCache]: Analyzing trace with hash 437870327, now seen corresponding path program 61 times [2021-06-05 23:59:35,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:59:35,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521244100] [2021-06-05 23:59:35,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:59:35,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:59:36,023 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:59:36,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:59:36,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521244100] [2021-06-05 23:59:36,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521244100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:59:36,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460748960] [2021-06-05 23:59:36,023 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:59:36,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:59:36,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:59:36,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:59:36,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:59:36,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:59:36,245 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:59:36,246 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 47 treesize of output 63 [2021-06-05 23:59:36,329 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 23:59:36,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:59:36,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:59:36,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:59:36,367 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:59:36,368 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 37 treesize of output 53 [2021-06-05 23:59:36,456 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 23:59:36,489 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:59:36,529 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:59:36,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 83 [2021-06-05 23:59:36,715 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 23:59:37,134 WARN L205 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 118 [2021-06-05 23:59:37,134 INFO L628 ElimStorePlain]: treesize reduction 120, result has 92.5 percent of original size [2021-06-05 23:59:37,284 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 179 [2021-06-05 23:59:37,511 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:59:37,512 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:58, output treesize:98 [2021-06-05 23:59:37,548 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:59:37,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460748960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:59:37,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:59:37,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-05 23:59:37,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017152820] [2021-06-05 23:59:37,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 23:59:37,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:59:37,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 23:59:37,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:59:37,549 INFO L87 Difference]: Start difference. First operand 1687 states and 5742 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:59:39,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:59:39,182 INFO L93 Difference]: Finished difference Result 2521 states and 7986 transitions. [2021-06-05 23:59:39,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 23:59:39,183 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:59:39,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:59:39,186 INFO L225 Difference]: With dead ends: 2521 [2021-06-05 23:59:39,186 INFO L226 Difference]: Without dead ends: 2484 [2021-06-05 23:59:39,187 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 1306.8ms TimeCoverageRelationStatistics Valid=353, Invalid=1999, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 23:59:39,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2484 states. [2021-06-05 23:59:39,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2484 to 1718. [2021-06-05 23:59:39,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1718 states, 1717 states have (on average 3.4111822947000583) internal successors, (5857), 1717 states have internal predecessors, (5857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:59:39,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1718 states to 1718 states and 5857 transitions. [2021-06-05 23:59:39,210 INFO L78 Accepts]: Start accepts. Automaton has 1718 states and 5857 transitions. Word has length 26 [2021-06-05 23:59:39,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:59:39,210 INFO L482 AbstractCegarLoop]: Abstraction has 1718 states and 5857 transitions. [2021-06-05 23:59:39,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:59:39,210 INFO L276 IsEmpty]: Start isEmpty. Operand 1718 states and 5857 transitions. [2021-06-05 23:59:39,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:59:39,212 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:59:39,212 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:59:39,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4741,112 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:59:39,417 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:59:39,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:59:39,417 INFO L82 PathProgramCache]: Analyzing trace with hash 663863851, now seen corresponding path program 62 times [2021-06-05 23:59:39,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:59:39,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79005713] [2021-06-05 23:59:39,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:59:39,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:59:39,528 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:59:39,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:59:39,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79005713] [2021-06-05 23:59:39,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79005713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:59:39,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190711543] [2021-06-05 23:59:39,528 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:59:39,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:59:39,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:59:39,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:59:39,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:59:39,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:59:39,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:59:39,687 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:59:39,687 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 47 treesize of output 63 [2021-06-05 23:59:39,772 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 23:59:39,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:59:39,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:59:39,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:59:39,808 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:59:39,808 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 37 treesize of output 53 [2021-06-05 23:59:39,890 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-05 23:59:39,921 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:59:39,965 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:59:39,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 83 [2021-06-05 23:59:40,162 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 23:59:40,686 WARN L205 SmtUtils]: Spent 523.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 123 [2021-06-05 23:59:40,686 INFO L628 ElimStorePlain]: treesize reduction 260, result has 86.7 percent of original size [2021-06-05 23:59:41,251 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:59:41,251 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:53, output treesize:149 [2021-06-05 23:59:41,305 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:59:41,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190711543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:59:41,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:59:41,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 23:59:41,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339567860] [2021-06-05 23:59:41,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 23:59:41,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:59:41,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 23:59:41,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:59:41,306 INFO L87 Difference]: Start difference. First operand 1718 states and 5857 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:59:42,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:59:42,188 INFO L93 Difference]: Finished difference Result 2981 states and 9498 transitions. [2021-06-05 23:59:42,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 23:59:42,188 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:59:42,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:59:42,192 INFO L225 Difference]: With dead ends: 2981 [2021-06-05 23:59:42,192 INFO L226 Difference]: Without dead ends: 2944 [2021-06-05 23:59:42,192 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 681.6ms TimeCoverageRelationStatistics Valid=302, Invalid=1180, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:59:42,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2944 states. [2021-06-05 23:59:42,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2944 to 1737. [2021-06-05 23:59:42,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1737 states, 1736 states have (on average 3.4164746543778803) internal successors, (5931), 1736 states have internal predecessors, (5931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:59:42,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1737 states to 1737 states and 5931 transitions. [2021-06-05 23:59:42,216 INFO L78 Accepts]: Start accepts. Automaton has 1737 states and 5931 transitions. Word has length 26 [2021-06-05 23:59:42,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:59:42,216 INFO L482 AbstractCegarLoop]: Abstraction has 1737 states and 5931 transitions. [2021-06-05 23:59:42,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:59:42,216 INFO L276 IsEmpty]: Start isEmpty. Operand 1737 states and 5931 transitions. [2021-06-05 23:59:42,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:59:42,218 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:59:42,218 INFO L554 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] [2021-06-05 23:59:42,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4890 [2021-06-05 23:59:42,420 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:59:42,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:59:42,421 INFO L82 PathProgramCache]: Analyzing trace with hash 53047903, now seen corresponding path program 51 times [2021-06-05 23:59:42,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:59:42,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132777688] [2021-06-05 23:59:42,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:59:42,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:59:42,587 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:59:42,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:59:42,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132777688] [2021-06-05 23:59:42,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132777688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:59:42,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786093065] [2021-06-05 23:59:42,587 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:59:42,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:59:42,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:59:42,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:59:42,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:59:44,060 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:59:44,061 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 43 treesize of output 59 [2021-06-05 23:59:44,132 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:59:44,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:59:44,184 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:59:44,184 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 35 treesize of output 51 [2021-06-05 23:59:44,290 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-05 23:59:44,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:59:44,371 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:59:44,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-06-05 23:59:44,385 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-05 23:59:44,462 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:59:44,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 9 xjuncts. [2021-06-05 23:59:44,582 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:61, output treesize:349 [2021-06-05 23:59:44,760 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 38 [2021-06-05 23:59:44,785 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:59:44,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786093065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:59:44,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:59:44,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 23:59:44,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755568553] [2021-06-05 23:59:44,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:59:44,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:59:44,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:59:44,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=251, Unknown=1, NotChecked=0, Total=306 [2021-06-05 23:59:44,786 INFO L87 Difference]: Start difference. First operand 1737 states and 5931 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:00:35,200 WARN L205 SmtUtils]: Spent 1.61 s on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2021-06-06 00:00:39,015 WARN L205 SmtUtils]: Spent 1.31 s on a formula simplification that was a NOOP. DAG size: 46 [2021-06-06 00:01:00,883 WARN L205 SmtUtils]: Spent 3.86 s on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2021-06-06 00:01:08,754 WARN L205 SmtUtils]: Spent 2.77 s on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2021-06-06 00:01:09,991 WARN L205 SmtUtils]: Spent 1.21 s on a formula simplification that was a NOOP. DAG size: 53 [2021-06-06 00:01:22,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:01:22,289 INFO L93 Difference]: Finished difference Result 2397 states and 7851 transitions. [2021-06-06 00:01:22,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-06 00:01:22,289 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:01:22,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:01:22,292 INFO L225 Difference]: With dead ends: 2397 [2021-06-06 00:01:22,292 INFO L226 Difference]: Without dead ends: 2382 [2021-06-06 00:01:22,293 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 36275.3ms TimeCoverageRelationStatistics Valid=297, Invalid=1666, Unknown=17, NotChecked=0, Total=1980 [2021-06-06 00:01:22,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2382 states. [2021-06-06 00:01:22,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2382 to 1750. [2021-06-06 00:01:22,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1750 states, 1749 states have (on average 3.4128073184676957) internal successors, (5969), 1749 states have internal predecessors, (5969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:01:22,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1750 states to 1750 states and 5969 transitions. [2021-06-06 00:01:22,316 INFO L78 Accepts]: Start accepts. Automaton has 1750 states and 5969 transitions. Word has length 26 [2021-06-06 00:01:22,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:01:22,316 INFO L482 AbstractCegarLoop]: Abstraction has 1750 states and 5969 transitions. [2021-06-06 00:01:22,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:01:22,317 INFO L276 IsEmpty]: Start isEmpty. Operand 1750 states and 5969 transitions. [2021-06-06 00:01:22,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:01:22,319 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:01:22,319 INFO L554 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] [2021-06-06 00:01:22,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5045 [2021-06-06 00:01:22,519 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:01:22,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:01:22,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1564484877, now seen corresponding path program 52 times [2021-06-06 00:01:22,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:01:22,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341111969] [2021-06-06 00:01:22,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:01:22,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:01:22,650 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:01:22,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:01:22,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341111969] [2021-06-06 00:01:22,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341111969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:01:22,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763261127] [2021-06-06 00:01:22,650 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:01:22,674 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:01:22,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:01:22,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:01:22,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:01:22,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:01:22,800 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:01:22,800 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 43 treesize of output 43 [2021-06-06 00:01:22,817 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-06 00:01:22,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:01:22,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:01:22,836 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:01:22,836 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 35 treesize of output 35 [2021-06-06 00:01:22,853 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-06 00:01:22,869 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:01:22,887 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:01:22,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-06-06 00:01:22,892 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-06 00:01:22,936 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:01:22,948 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:01:22,948 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:54, output treesize:19 [2021-06-06 00:01:22,985 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:01:22,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763261127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:01:22,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:01:22,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-06 00:01:22,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435761479] [2021-06-06 00:01:22,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:01:22,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:01:22,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:01:22,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:01:22,986 INFO L87 Difference]: Start difference. First operand 1750 states and 5969 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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) [2021-06-06 00:01:23,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:01:23,913 INFO L93 Difference]: Finished difference Result 2548 states and 8435 transitions. [2021-06-06 00:01:23,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-06 00:01:23,914 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 [2021-06-06 00:01:23,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:01:23,918 INFO L225 Difference]: With dead ends: 2548 [2021-06-06 00:01:23,918 INFO L226 Difference]: Without dead ends: 2533 [2021-06-06 00:01:23,918 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 629.9ms TimeCoverageRelationStatistics Valid=274, Invalid=986, Unknown=0, NotChecked=0, Total=1260 [2021-06-06 00:01:23,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2533 states. [2021-06-06 00:01:23,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2533 to 1753. [2021-06-06 00:01:23,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1753 states, 1752 states have (on average 3.4121004566210047) internal successors, (5978), 1752 states have internal predecessors, (5978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:01:23,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1753 states to 1753 states and 5978 transitions. [2021-06-06 00:01:23,942 INFO L78 Accepts]: Start accepts. Automaton has 1753 states and 5978 transitions. Word has length 26 [2021-06-06 00:01:23,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:01:23,942 INFO L482 AbstractCegarLoop]: Abstraction has 1753 states and 5978 transitions. [2021-06-06 00:01:23,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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) [2021-06-06 00:01:23,942 INFO L276 IsEmpty]: Start isEmpty. Operand 1753 states and 5978 transitions. [2021-06-06 00:01:23,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:01:23,944 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:01:23,944 INFO L554 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] [2021-06-06 00:01:24,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5156 [2021-06-06 00:01:24,145 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:01:24,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:01:24,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1040539515, now seen corresponding path program 53 times [2021-06-06 00:01:24,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:01:24,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824549144] [2021-06-06 00:01:24,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:01:24,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:01:24,336 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:01:24,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:01:24,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824549144] [2021-06-06 00:01:24,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824549144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:01:24,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488273665] [2021-06-06 00:01:24,337 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:01:24,368 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:01:24,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:01:24,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-06 00:01:24,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:01:24,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:01:24,484 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:01:24,484 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 43 treesize of output 43 [2021-06-06 00:01:24,501 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-06 00:01:24,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:01:24,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:01:24,519 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:01:24,519 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 35 treesize of output 35 [2021-06-06 00:01:24,536 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-06 00:01:24,550 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:01:24,567 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:01:24,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-06-06 00:01:24,573 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-06 00:01:24,621 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:01:24,632 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:01:24,632 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:49, output treesize:15 [2021-06-06 00:01:24,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:01:24,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488273665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:01:24,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:01:24,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-06 00:01:24,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570904594] [2021-06-06 00:01:24,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:01:24,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:01:24,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:01:24,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:01:24,686 INFO L87 Difference]: Start difference. First operand 1753 states and 5978 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:01:25,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:01:25,562 INFO L93 Difference]: Finished difference Result 2448 states and 8097 transitions. [2021-06-06 00:01:25,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-06 00:01:25,563 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:01:25,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:01:25,566 INFO L225 Difference]: With dead ends: 2448 [2021-06-06 00:01:25,566 INFO L226 Difference]: Without dead ends: 2423 [2021-06-06 00:01:25,566 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 738.3ms TimeCoverageRelationStatistics Valid=258, Invalid=1074, Unknown=0, NotChecked=0, Total=1332 [2021-06-06 00:01:25,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2423 states. [2021-06-06 00:01:25,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2423 to 1739. [2021-06-06 00:01:25,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1739 states, 1738 states have (on average 3.4177215189873418) internal successors, (5940), 1738 states have internal predecessors, (5940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:01:25,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1739 states to 1739 states and 5940 transitions. [2021-06-06 00:01:25,587 INFO L78 Accepts]: Start accepts. Automaton has 1739 states and 5940 transitions. Word has length 26 [2021-06-06 00:01:25,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:01:25,587 INFO L482 AbstractCegarLoop]: Abstraction has 1739 states and 5940 transitions. [2021-06-06 00:01:25,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:01:25,588 INFO L276 IsEmpty]: Start isEmpty. Operand 1739 states and 5940 transitions. [2021-06-06 00:01:25,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:01:25,590 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:01:25,590 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:01:25,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5175 [2021-06-06 00:01:25,790 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:01:25,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:01:25,791 INFO L82 PathProgramCache]: Analyzing trace with hash -366405619, now seen corresponding path program 63 times [2021-06-06 00:01:25,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:01:25,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136826522] [2021-06-06 00:01:25,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:01:25,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:01:25,902 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:01:25,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:01:25,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136826522] [2021-06-06 00:01:25,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136826522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:01:25,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386462809] [2021-06-06 00:01:25,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:01:25,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:01:25,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:01:25,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-06 00:01:25,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:01:26,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:01:26,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:01:26,036 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:01:26,037 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 47 treesize of output 65 [2021-06-06 00:01:26,120 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-06 00:01:26,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:01:26,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:01:26,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:01:26,159 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:01:26,159 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 37 treesize of output 55 [2021-06-06 00:01:26,267 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-06 00:01:26,307 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:01:26,358 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:01:26,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 83 [2021-06-06 00:01:26,684 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-06 00:01:27,129 WARN L205 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 116 [2021-06-06 00:01:27,130 INFO L628 ElimStorePlain]: treesize reduction 230, result has 87.5 percent of original size [2021-06-06 00:01:27,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:01:27,442 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:56, output treesize:88 [2021-06-06 00:01:27,490 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:01:27,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386462809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:01:27,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:01:27,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-06 00:01:27,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052281635] [2021-06-06 00:01:27,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:01:27,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:01:27,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:01:27,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:01:27,491 INFO L87 Difference]: Start difference. First operand 1739 states and 5940 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:01:28,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:01:28,568 INFO L93 Difference]: Finished difference Result 3292 states and 10488 transitions. [2021-06-06 00:01:28,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-06 00:01:28,569 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:01:28,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:01:28,573 INFO L225 Difference]: With dead ends: 3292 [2021-06-06 00:01:28,573 INFO L226 Difference]: Without dead ends: 3248 [2021-06-06 00:01:28,573 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 794.7ms TimeCoverageRelationStatistics Valid=344, Invalid=1296, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:01:28,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3248 states. [2021-06-06 00:01:28,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3248 to 1786. [2021-06-06 00:01:28,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1786 states, 1785 states have (on average 3.4252100840336133) internal successors, (6114), 1785 states have internal predecessors, (6114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:01:28,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1786 states to 1786 states and 6114 transitions. [2021-06-06 00:01:28,601 INFO L78 Accepts]: Start accepts. Automaton has 1786 states and 6114 transitions. Word has length 26 [2021-06-06 00:01:28,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:01:28,601 INFO L482 AbstractCegarLoop]: Abstraction has 1786 states and 6114 transitions. [2021-06-06 00:01:28,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:01:28,601 INFO L276 IsEmpty]: Start isEmpty. Operand 1786 states and 6114 transitions. [2021-06-06 00:01:28,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:01:28,603 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:01:28,603 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:01:28,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5192,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:01:28,803 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:01:28,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:01:28,804 INFO L82 PathProgramCache]: Analyzing trace with hash -356659183, now seen corresponding path program 64 times [2021-06-06 00:01:28,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:01:28,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426608614] [2021-06-06 00:01:28,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:01:28,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:01:28,956 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:01:28,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:01:28,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426608614] [2021-06-06 00:01:28,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426608614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:01:28,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906855233] [2021-06-06 00:01:28,957 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:01:28,988 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:01:28,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:01:28,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-06 00:01:28,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:01:29,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:01:29,165 INFO L354 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2021-06-06 00:01:29,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 209 treesize of output 175 [2021-06-06 00:01:29,168 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-06 00:01:29,176 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:01:29,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:01:29,206 INFO L354 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2021-06-06 00:01:29,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 120 treesize of output 98 [2021-06-06 00:01:29,209 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-06 00:01:29,215 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:01:29,222 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:01:29,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 30 treesize of output 26 [2021-06-06 00:01:29,223 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:01:29,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:01:29,233 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:01:29,233 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:212, output treesize:3 [2021-06-06 00:01:29,247 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:01:29,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906855233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:01:29,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:01:29,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-06 00:01:29,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700563609] [2021-06-06 00:01:29,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:01:29,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:01:29,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:01:29,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:01:29,248 INFO L87 Difference]: Start difference. First operand 1786 states and 6114 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:01:30,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:01:30,066 INFO L93 Difference]: Finished difference Result 2484 states and 8179 transitions. [2021-06-06 00:01:30,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-06 00:01:30,067 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:01:30,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:01:30,070 INFO L225 Difference]: With dead ends: 2484 [2021-06-06 00:01:30,070 INFO L226 Difference]: Without dead ends: 2462 [2021-06-06 00:01:30,070 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 762.6ms TimeCoverageRelationStatistics Valid=278, Invalid=1128, Unknown=0, NotChecked=0, Total=1406 [2021-06-06 00:01:30,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2462 states. [2021-06-06 00:01:30,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2462 to 1807. [2021-06-06 00:01:30,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1807 states, 1806 states have (on average 3.4186046511627906) internal successors, (6174), 1806 states have internal predecessors, (6174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:01:30,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1807 states to 1807 states and 6174 transitions. [2021-06-06 00:01:30,093 INFO L78 Accepts]: Start accepts. Automaton has 1807 states and 6174 transitions. Word has length 26 [2021-06-06 00:01:30,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:01:30,093 INFO L482 AbstractCegarLoop]: Abstraction has 1807 states and 6174 transitions. [2021-06-06 00:01:30,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:01:30,093 INFO L276 IsEmpty]: Start isEmpty. Operand 1807 states and 6174 transitions. [2021-06-06 00:01:30,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:01:30,095 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:01:30,095 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:01:30,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5363 [2021-06-06 00:01:30,296 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:01:30,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:01:30,296 INFO L82 PathProgramCache]: Analyzing trace with hash 568834683, now seen corresponding path program 65 times [2021-06-06 00:01:30,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:01:30,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725904910] [2021-06-06 00:01:30,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:01:30,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:01:30,425 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:01:30,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:01:30,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725904910] [2021-06-06 00:01:30,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725904910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:01:30,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781906079] [2021-06-06 00:01:30,425 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:01:30,450 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:01:30,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:01:30,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:01:30,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:01:32,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:01:32,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:01:32,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:01:32,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:01:32,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-06-06 00:01:32,550 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-06 00:01:32,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:01:32,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:01:32,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:01:32,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:01:32,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:01:32,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-06 00:01:32,562 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-06 00:01:32,568 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:01:32,575 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:01:32,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-06 00:01:32,576 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:01:32,584 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:01:32,586 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:01:32,586 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-06 00:01:32,604 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:01:32,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781906079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:01:32,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:01:32,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-06 00:01:32,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277159972] [2021-06-06 00:01:32,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:01:32,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:01:32,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:01:32,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=209, Unknown=2, NotChecked=0, Total=272 [2021-06-06 00:01:32,605 INFO L87 Difference]: Start difference. First operand 1807 states and 6174 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:01:36,805 WARN L205 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 50 [2021-06-06 00:01:38,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:01:38,166 INFO L93 Difference]: Finished difference Result 2669 states and 8779 transitions. [2021-06-06 00:01:38,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-06 00:01:38,166 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:01:38,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:01:38,170 INFO L225 Difference]: With dead ends: 2669 [2021-06-06 00:01:38,171 INFO L226 Difference]: Without dead ends: 2650 [2021-06-06 00:01:38,171 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 4717.1ms TimeCoverageRelationStatistics Valid=323, Invalid=1157, Unknown=2, NotChecked=0, Total=1482 [2021-06-06 00:01:38,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2650 states. [2021-06-06 00:01:38,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2650 to 1827. [2021-06-06 00:01:38,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1827 states, 1826 states have (on average 3.423329682365827) internal successors, (6251), 1826 states have internal predecessors, (6251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:01:38,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1827 states to 1827 states and 6251 transitions. [2021-06-06 00:01:38,197 INFO L78 Accepts]: Start accepts. Automaton has 1827 states and 6251 transitions. Word has length 26 [2021-06-06 00:01:38,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:01:38,197 INFO L482 AbstractCegarLoop]: Abstraction has 1827 states and 6251 transitions. [2021-06-06 00:01:38,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:01:38,197 INFO L276 IsEmpty]: Start isEmpty. Operand 1827 states and 6251 transitions. [2021-06-06 00:01:38,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:01:38,199 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:01:38,199 INFO L554 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] [2021-06-06 00:01:38,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5364 [2021-06-06 00:01:38,400 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:01:38,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:01:38,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1843182409, now seen corresponding path program 54 times [2021-06-06 00:01:38,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:01:38,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141756378] [2021-06-06 00:01:38,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:01:38,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:01:38,554 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:01:38,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:01:38,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141756378] [2021-06-06 00:01:38,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141756378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:01:38,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379699923] [2021-06-06 00:01:38,554 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:01:38,579 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:01:38,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:01:38,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:01:38,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:01:38,748 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:01:38,749 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 43 treesize of output 51 [2021-06-06 00:01:38,797 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-06 00:01:38,815 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:01:38,826 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:01:38,827 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 35 treesize of output 43 [2021-06-06 00:01:38,870 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-06 00:01:38,896 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:01:38,918 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:01:38,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-06-06 00:01:38,929 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-06 00:01:38,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:01:39,074 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:01:39,074 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:59, output treesize:110 [2021-06-06 00:01:39,185 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:01:39,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379699923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:01:39,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:01:39,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-06 00:01:39,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251442522] [2021-06-06 00:01:39,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:01:39,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:01:39,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:01:39,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:01:39,186 INFO L87 Difference]: Start difference. First operand 1827 states and 6251 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 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) [2021-06-06 00:01:40,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:01:40,831 INFO L93 Difference]: Finished difference Result 2809 states and 9183 transitions. [2021-06-06 00:01:40,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-06 00:01:40,831 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 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 26 [2021-06-06 00:01:40,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:01:40,835 INFO L225 Difference]: With dead ends: 2809 [2021-06-06 00:01:40,835 INFO L226 Difference]: Without dead ends: 2794 [2021-06-06 00:01:40,835 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 1125.8ms TimeCoverageRelationStatistics Valid=280, Invalid=1442, Unknown=0, NotChecked=0, Total=1722 [2021-06-06 00:01:40,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2794 states. [2021-06-06 00:01:40,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2794 to 1827. [2021-06-06 00:01:40,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1827 states, 1826 states have (on average 3.41894852135816) internal successors, (6243), 1826 states have internal predecessors, (6243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:01:40,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1827 states to 1827 states and 6243 transitions. [2021-06-06 00:01:40,859 INFO L78 Accepts]: Start accepts. Automaton has 1827 states and 6243 transitions. Word has length 26 [2021-06-06 00:01:40,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:01:40,859 INFO L482 AbstractCegarLoop]: Abstraction has 1827 states and 6243 transitions. [2021-06-06 00:01:40,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 19 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) [2021-06-06 00:01:40,860 INFO L276 IsEmpty]: Start isEmpty. Operand 1827 states and 6243 transitions. [2021-06-06 00:01:40,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:01:40,862 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:01:40,862 INFO L554 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] [2021-06-06 00:01:41,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5365 [2021-06-06 00:01:41,063 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:01:41,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:01:41,064 INFO L82 PathProgramCache]: Analyzing trace with hash 761841983, now seen corresponding path program 55 times [2021-06-06 00:01:41,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:01:41,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609020528] [2021-06-06 00:01:41,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:01:41,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:01:41,180 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:01:41,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:01:41,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609020528] [2021-06-06 00:01:41,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609020528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:01:41,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779138070] [2021-06-06 00:01:41,181 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:01:41,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:01:41,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:01:41,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:01:42,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:01:42,898 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:01:42,899 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 43 treesize of output 43 [2021-06-06 00:01:42,916 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-06 00:01:42,928 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:01:42,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:01:42,935 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:01:42,936 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 35 treesize of output 35 [2021-06-06 00:01:42,953 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-06 00:01:42,969 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:01:42,988 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:01:42,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-06-06 00:01:42,992 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-06 00:01:43,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:01:43,049 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:01:43,049 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:54, output treesize:19 [2021-06-06 00:01:43,087 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:01:43,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779138070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:01:43,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:01:43,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-06 00:01:43,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97157178] [2021-06-06 00:01:43,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:01:43,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:01:43,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:01:43,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=235, Unknown=1, NotChecked=0, Total=306 [2021-06-06 00:01:43,088 INFO L87 Difference]: Start difference. First operand 1827 states and 6243 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:01:43,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:01:43,587 INFO L93 Difference]: Finished difference Result 2450 states and 8163 transitions. [2021-06-06 00:01:43,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-06 00:01:43,588 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:01:43,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:01:43,591 INFO L225 Difference]: With dead ends: 2450 [2021-06-06 00:01:43,591 INFO L226 Difference]: Without dead ends: 2425 [2021-06-06 00:01:43,591 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 1999.3ms TimeCoverageRelationStatistics Valid=172, Invalid=639, Unknown=1, NotChecked=0, Total=812 [2021-06-06 00:01:43,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2425 states. [2021-06-06 00:01:43,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2425 to 1821. [2021-06-06 00:01:43,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1821 states, 1820 states have (on average 3.4164835164835163) internal successors, (6218), 1820 states have internal predecessors, (6218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:01:43,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1821 states to 1821 states and 6218 transitions. [2021-06-06 00:01:43,612 INFO L78 Accepts]: Start accepts. Automaton has 1821 states and 6218 transitions. Word has length 26 [2021-06-06 00:01:43,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:01:43,612 INFO L482 AbstractCegarLoop]: Abstraction has 1821 states and 6218 transitions. [2021-06-06 00:01:43,612 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:01:43,612 INFO L276 IsEmpty]: Start isEmpty. Operand 1821 states and 6218 transitions. [2021-06-06 00:01:43,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:01:43,614 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:01:43,614 INFO L554 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] [2021-06-06 00:01:43,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5425,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:01:43,814 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:01:43,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:01:43,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1900688067, now seen corresponding path program 56 times [2021-06-06 00:01:43,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:01:43,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084427198] [2021-06-06 00:01:43,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:01:43,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:01:43,930 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:01:43,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:01:43,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084427198] [2021-06-06 00:01:43,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084427198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:01:43,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56763262] [2021-06-06 00:01:43,931 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:01:43,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:01:43,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:01:43,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-06 00:01:43,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:01:44,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:01:44,081 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:01:44,081 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 43 treesize of output 43 [2021-06-06 00:01:44,098 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-06 00:01:44,123 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:01:44,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:01:44,130 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:01:44,130 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 35 treesize of output 35 [2021-06-06 00:01:44,147 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-06 00:01:44,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:01:44,178 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:01:44,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-06-06 00:01:44,183 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-06 00:01:44,224 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:01:44,235 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:01:44,235 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:49, output treesize:15 [2021-06-06 00:01:44,269 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:01:44,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56763262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:01:44,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:01:44,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-06 00:01:44,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079020001] [2021-06-06 00:01:44,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:01:44,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:01:44,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:01:44,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:01:44,270 INFO L87 Difference]: Start difference. First operand 1821 states and 6218 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:01:45,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:01:45,119 INFO L93 Difference]: Finished difference Result 2386 states and 7961 transitions. [2021-06-06 00:01:45,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-06 00:01:45,119 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:01:45,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:01:45,123 INFO L225 Difference]: With dead ends: 2386 [2021-06-06 00:01:45,123 INFO L226 Difference]: Without dead ends: 2371 [2021-06-06 00:01:45,123 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 620.8ms TimeCoverageRelationStatistics Valid=193, Invalid=1067, Unknown=0, NotChecked=0, Total=1260 [2021-06-06 00:01:45,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2371 states. [2021-06-06 00:01:45,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2371 to 1810. [2021-06-06 00:01:45,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1810 states, 1809 states have (on average 3.4201216141514648) internal successors, (6187), 1809 states have internal predecessors, (6187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:01:45,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1810 states to 1810 states and 6187 transitions. [2021-06-06 00:01:45,146 INFO L78 Accepts]: Start accepts. Automaton has 1810 states and 6187 transitions. Word has length 26 [2021-06-06 00:01:45,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:01:45,146 INFO L482 AbstractCegarLoop]: Abstraction has 1810 states and 6187 transitions. [2021-06-06 00:01:45,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:01:45,147 INFO L276 IsEmpty]: Start isEmpty. Operand 1810 states and 6187 transitions. [2021-06-06 00:01:45,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:01:45,149 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:01:45,149 INFO L554 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] [2021-06-06 00:01:45,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5444,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:01:45,349 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:01:45,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:01:45,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1048584581, now seen corresponding path program 57 times [2021-06-06 00:01:45,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:01:45,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047852658] [2021-06-06 00:01:45,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:01:45,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:01:45,505 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:01:45,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:01:45,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047852658] [2021-06-06 00:01:45,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047852658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:01:45,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939345376] [2021-06-06 00:01:45,506 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:01:45,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:01:45,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:01:45,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-06 00:01:45,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:01:47,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:01:47,395 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:01:47,395 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 43 treesize of output 51 [2021-06-06 00:01:47,431 INFO L550 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-06 00:01:47,449 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:01:47,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:01:47,462 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:01:47,462 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 35 treesize of output 43 [2021-06-06 00:01:47,505 INFO L550 ElimStorePlain]: Start of recursive call 3: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-06-06 00:01:47,532 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:01:47,554 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:01:47,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 47 [2021-06-06 00:01:47,565 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-06 00:01:47,625 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:01:47,690 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 3 xjuncts. [2021-06-06 00:01:47,690 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:59, output treesize:219 [2021-06-06 00:01:47,814 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:01:47,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939345376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:01:47,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:01:47,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-06 00:01:47,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88222540] [2021-06-06 00:01:47,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:01:47,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:01:47,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:01:47,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=236, Unknown=1, NotChecked=0, Total=306 [2021-06-06 00:01:47,815 INFO L87 Difference]: Start difference. First operand 1810 states and 6187 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:02:08,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:02:08,588 INFO L93 Difference]: Finished difference Result 2381 states and 7969 transitions. [2021-06-06 00:02:08,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-06 00:02:08,589 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:02:08,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:02:08,592 INFO L225 Difference]: With dead ends: 2381 [2021-06-06 00:02:08,592 INFO L226 Difference]: Without dead ends: 2366 [2021-06-06 00:02:08,592 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 2265.2ms TimeCoverageRelationStatistics Valid=166, Invalid=589, Unknown=1, NotChecked=0, Total=756 [2021-06-06 00:02:08,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2366 states. [2021-06-06 00:02:08,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2366 to 1804. [2021-06-06 00:02:08,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1804 states, 1803 states have (on average 3.4215196894065447) internal successors, (6169), 1803 states have internal predecessors, (6169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:02:08,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1804 states to 1804 states and 6169 transitions. [2021-06-06 00:02:08,612 INFO L78 Accepts]: Start accepts. Automaton has 1804 states and 6169 transitions. Word has length 26 [2021-06-06 00:02:08,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:02:08,613 INFO L482 AbstractCegarLoop]: Abstraction has 1804 states and 6169 transitions. [2021-06-06 00:02:08,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:02:08,613 INFO L276 IsEmpty]: Start isEmpty. Operand 1804 states and 6169 transitions. [2021-06-06 00:02:08,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:02:08,615 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:02:08,615 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:02:08,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5462,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:02:08,815 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:02:08,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:02:08,815 INFO L82 PathProgramCache]: Analyzing trace with hash 203762543, now seen corresponding path program 66 times [2021-06-06 00:02:08,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:02:08,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205852085] [2021-06-06 00:02:08,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:02:08,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:02:08,980 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:02:08,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:02:08,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205852085] [2021-06-06 00:02:08,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205852085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:02:08,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950361493] [2021-06-06 00:02:08,980 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:02:09,005 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:02:09,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:02:09,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-06 00:02:09,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:02:09,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:02:09,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:02:09,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:02:09,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:02:09,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-06-06 00:02:09,150 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-06 00:02:09,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:02:09,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:02:09,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:02:09,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:02:09,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:02:09,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-06 00:02:09,176 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-06 00:02:09,182 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:02:09,190 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:02:09,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-06 00:02:09,192 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:02:09,200 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:02:09,202 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:02:09,202 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-06 00:02:09,221 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:02:09,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950361493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:02:09,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:02:09,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-06 00:02:09,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616734349] [2021-06-06 00:02:09,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:02:09,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:02:09,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:02:09,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:02:09,222 INFO L87 Difference]: Start difference. First operand 1804 states and 6169 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:02:10,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:02:10,612 INFO L93 Difference]: Finished difference Result 2506 states and 8313 transitions. [2021-06-06 00:02:10,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:02:10,612 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:02:10,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:02:10,616 INFO L225 Difference]: With dead ends: 2506 [2021-06-06 00:02:10,616 INFO L226 Difference]: Without dead ends: 2484 [2021-06-06 00:02:10,617 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 1169.7ms TimeCoverageRelationStatistics Valid=432, Invalid=1730, Unknown=0, NotChecked=0, Total=2162 [2021-06-06 00:02:10,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2484 states. [2021-06-06 00:02:10,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2484 to 1798. [2021-06-06 00:02:10,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1798 states, 1797 states have (on average 3.4201446855870894) internal successors, (6146), 1797 states have internal predecessors, (6146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:02:10,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1798 states to 1798 states and 6146 transitions. [2021-06-06 00:02:10,639 INFO L78 Accepts]: Start accepts. Automaton has 1798 states and 6146 transitions. Word has length 26 [2021-06-06 00:02:10,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:02:10,639 INFO L482 AbstractCegarLoop]: Abstraction has 1798 states and 6146 transitions. [2021-06-06 00:02:10,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:02:10,640 INFO L276 IsEmpty]: Start isEmpty. Operand 1798 states and 6146 transitions. [2021-06-06 00:02:10,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:02:10,642 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:02:10,642 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:02:10,842 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5517,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:02:10,842 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:02:10,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:02:10,842 INFO L82 PathProgramCache]: Analyzing trace with hash -82162369, now seen corresponding path program 67 times [2021-06-06 00:02:10,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:02:10,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310227361] [2021-06-06 00:02:10,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:02:10,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:02:10,993 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:02:10,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:02:10,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310227361] [2021-06-06 00:02:10,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310227361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:02:10,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921108029] [2021-06-06 00:02:10,994 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:02:11,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:02:11,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:02:11,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:02:12,813 WARN L205 SmtUtils]: Spent 851.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-06-06 00:02:12,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:02:12,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:02:12,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:02:12,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-06-06 00:02:12,828 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-06 00:02:12,838 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:02:12,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:02:12,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:02:12,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-06 00:02:12,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-06 00:02:12,844 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-06 00:02:12,850 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:02:12,856 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:02:12,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 23 [2021-06-06 00:02:12,858 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-06 00:02:12,866 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:02:12,868 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:02:12,868 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:53, output treesize:3 [2021-06-06 00:02:12,886 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:02:12,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921108029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:02:12,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:02:12,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-06 00:02:12,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423013644] [2021-06-06 00:02:12,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:02:12,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:02:12,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:02:12,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=213, Unknown=1, NotChecked=0, Total=272 [2021-06-06 00:02:12,887 INFO L87 Difference]: Start difference. First operand 1798 states and 6146 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:02:15,123 WARN L205 SmtUtils]: Spent 1.45 s on a formula simplification that was a NOOP. DAG size: 43 [2021-06-06 00:02:15,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:02:15,169 INFO L93 Difference]: Finished difference Result 2433 states and 8050 transitions. [2021-06-06 00:02:15,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-06 00:02:15,169 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:02:15,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:02:15,172 INFO L225 Difference]: With dead ends: 2433 [2021-06-06 00:02:15,172 INFO L226 Difference]: Without dead ends: 2414 [2021-06-06 00:02:15,172 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 3865.1ms TimeCoverageRelationStatistics Valid=302, Invalid=1179, Unknown=1, NotChecked=0, Total=1482 [2021-06-06 00:02:15,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2414 states. [2021-06-06 00:02:15,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2414 to 1788. [2021-06-06 00:02:15,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1788 states, 1787 states have (on average 3.420817011751539) internal successors, (6113), 1787 states have internal predecessors, (6113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:02:15,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1788 states to 1788 states and 6113 transitions. [2021-06-06 00:02:15,193 INFO L78 Accepts]: Start accepts. Automaton has 1788 states and 6113 transitions. Word has length 26 [2021-06-06 00:02:15,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:02:15,193 INFO L482 AbstractCegarLoop]: Abstraction has 1788 states and 6113 transitions. [2021-06-06 00:02:15,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:02:15,193 INFO L276 IsEmpty]: Start isEmpty. Operand 1788 states and 6113 transitions. [2021-06-06 00:02:15,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:02:15,195 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:02:15,195 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:02:15,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5518,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:02:15,397 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:02:15,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:02:15,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1381576581, now seen corresponding path program 68 times [2021-06-06 00:02:15,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:02:15,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741474578] [2021-06-06 00:02:15,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:02:15,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:02:15,577 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:02:15,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:02:15,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741474578] [2021-06-06 00:02:15,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741474578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:02:15,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331909180] [2021-06-06 00:02:15,579 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:02:15,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:02:15,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:02:15,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-06 00:02:15,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:02:19,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:02:19,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:02:19,802 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:02:19,802 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 47 treesize of output 65 [2021-06-06 00:02:19,902 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-06 00:02:19,924 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:02:19,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:02:19,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:02:19,941 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:02:19,941 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 37 treesize of output 55 [2021-06-06 00:02:20,021 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-06 00:02:20,054 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:02:20,093 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:02:20,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 83 [2021-06-06 00:02:20,329 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-06 00:02:21,035 WARN L205 SmtUtils]: Spent 704.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 111 [2021-06-06 00:02:21,035 INFO L628 ElimStorePlain]: treesize reduction 862, result has 54.9 percent of original size [2021-06-06 00:02:21,327 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:02:21,328 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:56, output treesize:78 [2021-06-06 00:02:21,366 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:02:21,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331909180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:02:21,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:02:21,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-06 00:02:21,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570113398] [2021-06-06 00:02:21,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:02:21,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:02:21,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:02:21,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=275, Unknown=2, NotChecked=0, Total=342 [2021-06-06 00:02:21,368 INFO L87 Difference]: Start difference. First operand 1788 states and 6113 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:02:22,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:02:22,244 INFO L93 Difference]: Finished difference Result 2410 states and 8027 transitions. [2021-06-06 00:02:22,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-06 00:02:22,244 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:02:22,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:02:22,248 INFO L225 Difference]: With dead ends: 2410 [2021-06-06 00:02:22,248 INFO L226 Difference]: Without dead ends: 2395 [2021-06-06 00:02:22,248 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 4788.2ms TimeCoverageRelationStatistics Valid=238, Invalid=1092, Unknown=2, NotChecked=0, Total=1332 [2021-06-06 00:02:22,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2395 states. [2021-06-06 00:02:22,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2395 to 1793. [2021-06-06 00:02:22,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1793 states, 1792 states have (on average 3.42578125) internal successors, (6139), 1792 states have internal predecessors, (6139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:02:22,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1793 states to 1793 states and 6139 transitions. [2021-06-06 00:02:22,270 INFO L78 Accepts]: Start accepts. Automaton has 1793 states and 6139 transitions. Word has length 26 [2021-06-06 00:02:22,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:02:22,270 INFO L482 AbstractCegarLoop]: Abstraction has 1793 states and 6139 transitions. [2021-06-06 00:02:22,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:02:22,270 INFO L276 IsEmpty]: Start isEmpty. Operand 1793 states and 6139 transitions. [2021-06-06 00:02:22,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:02:22,272 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:02:22,272 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:02:22,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5519 [2021-06-06 00:02:22,475 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:02:22,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:02:22,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1841060543, now seen corresponding path program 69 times [2021-06-06 00:02:22,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:02:22,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183987625] [2021-06-06 00:02:22,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:02:22,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:02:22,649 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:02:22,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:02:22,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183987625] [2021-06-06 00:02:22,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183987625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:02:22,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423092102] [2021-06-06 00:02:22,649 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:02:22,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:02:22,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:02:22,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-06 00:02:22,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:02:24,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:02:24,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:02:24,598 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:02:24,598 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 47 treesize of output 65 [2021-06-06 00:02:24,685 INFO L550 ElimStorePlain]: Start of recursive call 2: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-06 00:02:24,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:02:24,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:02:24,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-06 00:02:24,723 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:02:24,723 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 37 treesize of output 55 [2021-06-06 00:02:24,802 INFO L550 ElimStorePlain]: Start of recursive call 3: 4 dim-0 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2021-06-06 00:02:24,834 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:02:24,874 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:02:24,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 27 treesize of output 83 [2021-06-06 00:02:25,169 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 3 xjuncts. [2021-06-06 00:02:25,709 WARN L205 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 122 [2021-06-06 00:02:25,709 INFO L628 ElimStorePlain]: treesize reduction 708, result has 70.2 percent of original size [2021-06-06 00:02:25,884 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 157 [2021-06-06 00:02:26,111 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:02:26,111 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:56, output treesize:43 [2021-06-06 00:02:26,161 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:02:26,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423092102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:02:26,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:02:26,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-06 00:02:26,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026489713] [2021-06-06 00:02:26,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:02:26,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:02:26,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:02:26,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=187, Unknown=1, NotChecked=0, Total=240 [2021-06-06 00:02:26,162 INFO L87 Difference]: Start difference. First operand 1793 states and 6139 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:02:44,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:02:44,841 INFO L93 Difference]: Finished difference Result 2526 states and 8347 transitions. [2021-06-06 00:02:44,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-06 00:02:44,842 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:02:44,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:02:44,846 INFO L225 Difference]: With dead ends: 2526 [2021-06-06 00:02:44,846 INFO L226 Difference]: Without dead ends: 2496 [2021-06-06 00:02:44,846 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 2392.9ms TimeCoverageRelationStatistics Valid=206, Invalid=849, Unknown=1, NotChecked=0, Total=1056 [2021-06-06 00:02:44,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2496 states. [2021-06-06 00:02:44,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2496 to 1788. [2021-06-06 00:02:44,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1788 states, 1787 states have (on average 3.4191382204812535) internal successors, (6110), 1787 states have internal predecessors, (6110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:02:44,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1788 states to 1788 states and 6110 transitions. [2021-06-06 00:02:44,868 INFO L78 Accepts]: Start accepts. Automaton has 1788 states and 6110 transitions. Word has length 26 [2021-06-06 00:02:44,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:02:44,868 INFO L482 AbstractCegarLoop]: Abstraction has 1788 states and 6110 transitions. [2021-06-06 00:02:44,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:02:44,868 INFO L276 IsEmpty]: Start isEmpty. Operand 1788 states and 6110 transitions. [2021-06-06 00:02:44,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:02:44,870 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:02:44,870 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:02:45,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5662 [2021-06-06 00:02:45,082 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:02:45,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:02:45,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1705681877, now seen corresponding path program 58 times [2021-06-06 00:02:45,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:02:45,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146367055] [2021-06-06 00:02:45,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:02:45,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:02:45,126 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:02:45,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:02:45,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146367055] [2021-06-06 00:02:45,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146367055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:02:45,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658328608] [2021-06-06 00:02:45,126 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:02:45,152 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:02:45,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:02:45,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:02:45,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:02:45,254 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:02:45,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658328608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:02:45,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:02:45,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-06 00:02:45,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947067591] [2021-06-06 00:02:45,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:02:45,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:02:45,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:02:45,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:02:45,255 INFO L87 Difference]: Start difference. First operand 1788 states and 6110 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:02:46,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:02:46,285 INFO L93 Difference]: Finished difference Result 4735 states and 14630 transitions. [2021-06-06 00:02:46,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-06 00:02:46,286 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:02:46,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:02:46,292 INFO L225 Difference]: With dead ends: 4735 [2021-06-06 00:02:46,292 INFO L226 Difference]: Without dead ends: 4735 [2021-06-06 00:02:46,292 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 568.3ms TimeCoverageRelationStatistics Valid=802, Invalid=2858, Unknown=0, NotChecked=0, Total=3660 [2021-06-06 00:02:46,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4735 states. [2021-06-06 00:02:46,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4735 to 1981. [2021-06-06 00:02:46,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1981 states, 1980 states have (on average 3.4752525252525253) internal successors, (6881), 1980 states have internal predecessors, (6881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:02:46,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1981 states to 1981 states and 6881 transitions. [2021-06-06 00:02:46,329 INFO L78 Accepts]: Start accepts. Automaton has 1981 states and 6881 transitions. Word has length 28 [2021-06-06 00:02:46,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:02:46,329 INFO L482 AbstractCegarLoop]: Abstraction has 1981 states and 6881 transitions. [2021-06-06 00:02:46,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:02:46,329 INFO L276 IsEmpty]: Start isEmpty. Operand 1981 states and 6881 transitions. [2021-06-06 00:02:46,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:02:46,331 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:02:46,331 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:02:46,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5784 [2021-06-06 00:02:46,532 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:02:46,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:02:46,532 INFO L82 PathProgramCache]: Analyzing trace with hash 729363033, now seen corresponding path program 59 times [2021-06-06 00:02:46,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:02:46,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195980414] [2021-06-06 00:02:46,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:02:46,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:02:46,575 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:02:46,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:02:46,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195980414] [2021-06-06 00:02:46,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195980414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:02:46,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83090355] [2021-06-06 00:02:46,576 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:02:46,610 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:02:46,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:02:46,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:02:46,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:02:46,723 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:02:46,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83090355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:02:46,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:02:46,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-06 00:02:46,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104829056] [2021-06-06 00:02:46,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:02:46,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:02:46,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:02:46,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:02:46,724 INFO L87 Difference]: Start difference. First operand 1981 states and 6881 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:02:48,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:02:48,005 INFO L93 Difference]: Finished difference Result 6281 states and 19109 transitions. [2021-06-06 00:02:48,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-06 00:02:48,006 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:02:48,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:02:48,015 INFO L225 Difference]: With dead ends: 6281 [2021-06-06 00:02:48,015 INFO L226 Difference]: Without dead ends: 6281 [2021-06-06 00:02:48,016 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2023 ImplicationChecksByTransitivity, 795.3ms TimeCoverageRelationStatistics Valid=1110, Invalid=4590, Unknown=0, NotChecked=0, Total=5700 [2021-06-06 00:02:48,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6281 states. [2021-06-06 00:02:48,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6281 to 1992. [2021-06-06 00:02:48,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1992 states, 1991 states have (on average 3.4831742842792566) internal successors, (6935), 1991 states have internal predecessors, (6935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:02:48,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1992 states to 1992 states and 6935 transitions. [2021-06-06 00:02:48,076 INFO L78 Accepts]: Start accepts. Automaton has 1992 states and 6935 transitions. Word has length 28 [2021-06-06 00:02:48,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:02:48,077 INFO L482 AbstractCegarLoop]: Abstraction has 1992 states and 6935 transitions. [2021-06-06 00:02:48,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:02:48,077 INFO L276 IsEmpty]: Start isEmpty. Operand 1992 states and 6935 transitions. [2021-06-06 00:02:48,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:02:48,079 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:02:48,079 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:02:48,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5785,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:02:48,280 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:02:48,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:02:48,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1296315113, now seen corresponding path program 60 times [2021-06-06 00:02:48,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:02:48,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613689566] [2021-06-06 00:02:48,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:02:48,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:02:48,322 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:02:48,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:02:48,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613689566] [2021-06-06 00:02:48,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613689566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:02:48,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888984968] [2021-06-06 00:02:48,322 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:02:48,347 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:02:48,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:02:48,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:02:48,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:02:48,457 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:02:48,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888984968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:02:48,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:02:48,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-06 00:02:48,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965743120] [2021-06-06 00:02:48,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:02:48,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:02:48,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:02:48,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:02:48,458 INFO L87 Difference]: Start difference. First operand 1992 states and 6935 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:02:49,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:02:49,760 INFO L93 Difference]: Finished difference Result 5674 states and 17641 transitions. [2021-06-06 00:02:49,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-06 00:02:49,761 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:02:49,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:02:49,770 INFO L225 Difference]: With dead ends: 5674 [2021-06-06 00:02:49,771 INFO L226 Difference]: Without dead ends: 5674 [2021-06-06 00:02:49,771 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2006 ImplicationChecksByTransitivity, 783.9ms TimeCoverageRelationStatistics Valid=1099, Invalid=4451, Unknown=0, NotChecked=0, Total=5550 [2021-06-06 00:02:49,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5674 states. [2021-06-06 00:02:49,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5674 to 1940. [2021-06-06 00:02:49,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1940 states, 1939 states have (on average 3.4569365652398143) internal successors, (6703), 1939 states have internal predecessors, (6703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:02:49,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1940 states to 1940 states and 6703 transitions. [2021-06-06 00:02:49,823 INFO L78 Accepts]: Start accepts. Automaton has 1940 states and 6703 transitions. Word has length 28 [2021-06-06 00:02:49,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:02:49,823 INFO L482 AbstractCegarLoop]: Abstraction has 1940 states and 6703 transitions. [2021-06-06 00:02:49,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:02:49,823 INFO L276 IsEmpty]: Start isEmpty. Operand 1940 states and 6703 transitions. [2021-06-06 00:02:49,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:02:49,826 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:02:49,826 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:02:50,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5786,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:02:50,041 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:02:50,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:02:50,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1816623861, now seen corresponding path program 61 times [2021-06-06 00:02:50,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:02:50,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521858671] [2021-06-06 00:02:50,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:02:50,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:02:50,083 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:02:50,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:02:50,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521858671] [2021-06-06 00:02:50,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521858671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:02:50,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770561634] [2021-06-06 00:02:50,083 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:02:50,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:02:50,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:02:50,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:02:50,206 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:02:50,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770561634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:02:50,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:02:50,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-06 00:02:50,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670153539] [2021-06-06 00:02:50,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:02:50,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:02:50,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:02:50,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:02:50,207 INFO L87 Difference]: Start difference. First operand 1940 states and 6703 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 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) [2021-06-06 00:02:51,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:02:51,300 INFO L93 Difference]: Finished difference Result 4821 states and 14797 transitions. [2021-06-06 00:02:51,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-06 00:02:51,300 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 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 28 [2021-06-06 00:02:51,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:02:51,306 INFO L225 Difference]: With dead ends: 4821 [2021-06-06 00:02:51,307 INFO L226 Difference]: Without dead ends: 4821 [2021-06-06 00:02:51,307 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1541 ImplicationChecksByTransitivity, 675.6ms TimeCoverageRelationStatistics Valid=904, Invalid=3652, Unknown=0, NotChecked=0, Total=4556 [2021-06-06 00:02:51,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4821 states. [2021-06-06 00:02:51,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4821 to 1950. [2021-06-06 00:02:51,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1950 states, 1949 states have (on average 3.452539763981529) internal successors, (6729), 1949 states have internal predecessors, (6729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:02:51,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1950 states to 1950 states and 6729 transitions. [2021-06-06 00:02:51,342 INFO L78 Accepts]: Start accepts. Automaton has 1950 states and 6729 transitions. Word has length 28 [2021-06-06 00:02:51,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:02:51,342 INFO L482 AbstractCegarLoop]: Abstraction has 1950 states and 6729 transitions. [2021-06-06 00:02:51,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 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) [2021-06-06 00:02:51,342 INFO L276 IsEmpty]: Start isEmpty. Operand 1950 states and 6729 transitions. [2021-06-06 00:02:51,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:02:51,345 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:02:51,345 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:02:51,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5787,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:02:51,545 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:02:51,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:02:51,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1268713169, now seen corresponding path program 70 times [2021-06-06 00:02:51,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:02:51,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868475625] [2021-06-06 00:02:51,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:02:51,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:02:51,587 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:02:51,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:02:51,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868475625] [2021-06-06 00:02:51,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868475625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:02:51,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387336236] [2021-06-06 00:02:51,588 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:02:51,612 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:02:51,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:02:51,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:02:51,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:02:51,712 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:02:51,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387336236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:02:51,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:02:51,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-06 00:02:51,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550626320] [2021-06-06 00:02:51,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:02:51,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:02:51,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:02:51,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:02:51,713 INFO L87 Difference]: Start difference. First operand 1950 states and 6729 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:02:52,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:02:52,318 INFO L93 Difference]: Finished difference Result 4242 states and 13200 transitions. [2021-06-06 00:02:52,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-06 00:02:52,318 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:02:52,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:02:52,324 INFO L225 Difference]: With dead ends: 4242 [2021-06-06 00:02:52,324 INFO L226 Difference]: Without dead ends: 4242 [2021-06-06 00:02:52,324 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 343.0ms TimeCoverageRelationStatistics Valid=383, Invalid=1339, Unknown=0, NotChecked=0, Total=1722 [2021-06-06 00:02:52,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4242 states. [2021-06-06 00:02:52,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4242 to 2006. [2021-06-06 00:02:52,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2006 states, 2005 states have (on average 3.437406483790524) internal successors, (6892), 2005 states have internal predecessors, (6892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:02:52,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2006 states to 2006 states and 6892 transitions. [2021-06-06 00:02:52,356 INFO L78 Accepts]: Start accepts. Automaton has 2006 states and 6892 transitions. Word has length 28 [2021-06-06 00:02:52,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:02:52,356 INFO L482 AbstractCegarLoop]: Abstraction has 2006 states and 6892 transitions. [2021-06-06 00:02:52,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:02:52,356 INFO L276 IsEmpty]: Start isEmpty. Operand 2006 states and 6892 transitions. [2021-06-06 00:02:52,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:02:52,358 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:02:52,358 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:02:52,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5788,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:02:52,559 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:02:52,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:02:52,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1127344537, now seen corresponding path program 62 times [2021-06-06 00:02:52,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:02:52,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244185968] [2021-06-06 00:02:52,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:02:52,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:02:52,587 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:02:52,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:02:52,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244185968] [2021-06-06 00:02:52,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244185968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:02:52,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122940412] [2021-06-06 00:02:52,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:02:52,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:02:52,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:02:52,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:02:52,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:02:52,670 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:02:52,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122940412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:02:52,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:02:52,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-06 00:02:52,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857300242] [2021-06-06 00:02:52,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:02:52,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:02:52,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:02:52,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:02:52,671 INFO L87 Difference]: Start difference. First operand 2006 states and 6892 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:02:52,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:02:52,844 INFO L93 Difference]: Finished difference Result 3508 states and 11418 transitions. [2021-06-06 00:02:52,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-06 00:02:52,845 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:02:52,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:02:52,849 INFO L225 Difference]: With dead ends: 3508 [2021-06-06 00:02:52,849 INFO L226 Difference]: Without dead ends: 3490 [2021-06-06 00:02:52,849 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 114.5ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:02:52,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3490 states. [2021-06-06 00:02:52,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3490 to 2393. [2021-06-06 00:02:52,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2393 states, 2392 states have (on average 3.5100334448160537) internal successors, (8396), 2392 states have internal predecessors, (8396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:02:52,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2393 states to 2393 states and 8396 transitions. [2021-06-06 00:02:52,881 INFO L78 Accepts]: Start accepts. Automaton has 2393 states and 8396 transitions. Word has length 28 [2021-06-06 00:02:52,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:02:52,881 INFO L482 AbstractCegarLoop]: Abstraction has 2393 states and 8396 transitions. [2021-06-06 00:02:52,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:02:52,881 INFO L276 IsEmpty]: Start isEmpty. Operand 2393 states and 8396 transitions. [2021-06-06 00:02:52,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:02:52,884 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:02:52,884 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:02:53,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5789 [2021-06-06 00:02:53,084 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:02:53,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:02:53,085 INFO L82 PathProgramCache]: Analyzing trace with hash 690375829, now seen corresponding path program 63 times [2021-06-06 00:02:53,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:02:53,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986476494] [2021-06-06 00:02:53,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:02:53,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:02:53,119 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:02:53,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:02:53,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986476494] [2021-06-06 00:02:53,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986476494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:02:53,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564924948] [2021-06-06 00:02:53,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:02:53,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:02:53,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:02:53,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:02:53,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:02:53,225 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:02:53,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564924948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:02:53,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:02:53,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-06 00:02:53,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785135984] [2021-06-06 00:02:53,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:02:53,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:02:53,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:02:53,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:02:53,226 INFO L87 Difference]: Start difference. First operand 2393 states and 8396 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:02:53,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:02:53,840 INFO L93 Difference]: Finished difference Result 4165 states and 13279 transitions. [2021-06-06 00:02:53,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-06 00:02:53,840 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:02:53,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:02:53,846 INFO L225 Difference]: With dead ends: 4165 [2021-06-06 00:02:53,846 INFO L226 Difference]: Without dead ends: 4118 [2021-06-06 00:02:53,846 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 362.9ms TimeCoverageRelationStatistics Valid=515, Invalid=1465, Unknown=0, NotChecked=0, Total=1980 [2021-06-06 00:02:53,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4118 states. [2021-06-06 00:02:53,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4118 to 2561. [2021-06-06 00:02:53,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2561 states, 2560 states have (on average 3.53046875) internal successors, (9038), 2560 states have internal predecessors, (9038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:02:53,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2561 states to 2561 states and 9038 transitions. [2021-06-06 00:02:53,885 INFO L78 Accepts]: Start accepts. Automaton has 2561 states and 9038 transitions. Word has length 28 [2021-06-06 00:02:53,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:02:53,885 INFO L482 AbstractCegarLoop]: Abstraction has 2561 states and 9038 transitions. [2021-06-06 00:02:53,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:02:53,885 INFO L276 IsEmpty]: Start isEmpty. Operand 2561 states and 9038 transitions. [2021-06-06 00:02:53,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:02:53,888 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:02:53,888 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:02:54,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5790 [2021-06-06 00:02:54,089 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:02:54,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:02:54,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1670242449, now seen corresponding path program 71 times [2021-06-06 00:02:54,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:02:54,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262076031] [2021-06-06 00:02:54,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:02:54,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:02:54,131 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:02:54,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:02:54,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262076031] [2021-06-06 00:02:54,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262076031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:02:54,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155313525] [2021-06-06 00:02:54,131 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:02:54,156 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:02:54,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:02:54,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:02:54,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:02:54,259 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:02:54,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155313525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:02:54,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:02:54,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-06 00:02:54,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565515086] [2021-06-06 00:02:54,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:02:54,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:02:54,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:02:54,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:02:54,260 INFO L87 Difference]: Start difference. First operand 2561 states and 9038 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:02:54,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:02:54,683 INFO L93 Difference]: Finished difference Result 5014 states and 16655 transitions. [2021-06-06 00:02:54,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-06 00:02:54,683 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:02:54,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:02:54,690 INFO L225 Difference]: With dead ends: 5014 [2021-06-06 00:02:54,690 INFO L226 Difference]: Without dead ends: 4927 [2021-06-06 00:02:54,691 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 335.2ms TimeCoverageRelationStatistics Valid=380, Invalid=1102, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:02:54,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4927 states. [2021-06-06 00:02:54,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4927 to 3219. [2021-06-06 00:02:54,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3219 states, 3218 states have (on average 3.550652579241765) internal successors, (11426), 3218 states have internal predecessors, (11426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:02:54,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3219 states to 3219 states and 11426 transitions. [2021-06-06 00:02:54,744 INFO L78 Accepts]: Start accepts. Automaton has 3219 states and 11426 transitions. Word has length 28 [2021-06-06 00:02:54,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:02:54,744 INFO L482 AbstractCegarLoop]: Abstraction has 3219 states and 11426 transitions. [2021-06-06 00:02:54,744 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:02:54,744 INFO L276 IsEmpty]: Start isEmpty. Operand 3219 states and 11426 transitions. [2021-06-06 00:02:54,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:02:54,748 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:02:54,748 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:02:54,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5791,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:02:54,948 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:02:54,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:02:54,949 INFO L82 PathProgramCache]: Analyzing trace with hash -2068501991, now seen corresponding path program 64 times [2021-06-06 00:02:54,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:02:54,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297256106] [2021-06-06 00:02:54,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:02:54,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:02:54,993 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:02:54,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:02:54,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297256106] [2021-06-06 00:02:54,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297256106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:02:54,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465806148] [2021-06-06 00:02:54,993 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:02:55,037 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:02:55,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:02:55,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:02:55,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:02:55,129 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:02:55,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465806148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:02:55,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:02:55,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-06 00:02:55,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157077476] [2021-06-06 00:02:55,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:02:55,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:02:55,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:02:55,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:02:55,130 INFO L87 Difference]: Start difference. First operand 3219 states and 11426 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:02:55,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:02:55,817 INFO L93 Difference]: Finished difference Result 5456 states and 17327 transitions. [2021-06-06 00:02:55,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-06 00:02:55,818 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:02:55,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:02:55,825 INFO L225 Difference]: With dead ends: 5456 [2021-06-06 00:02:55,825 INFO L226 Difference]: Without dead ends: 5430 [2021-06-06 00:02:55,825 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 452.5ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-06-06 00:02:55,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5430 states. [2021-06-06 00:02:55,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5430 to 3237. [2021-06-06 00:02:55,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3237 states, 3236 states have (on average 3.5559332509270702) internal successors, (11507), 3236 states have internal predecessors, (11507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:02:55,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3237 states to 3237 states and 11507 transitions. [2021-06-06 00:02:55,879 INFO L78 Accepts]: Start accepts. Automaton has 3237 states and 11507 transitions. Word has length 28 [2021-06-06 00:02:55,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:02:55,879 INFO L482 AbstractCegarLoop]: Abstraction has 3237 states and 11507 transitions. [2021-06-06 00:02:55,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:02:55,879 INFO L276 IsEmpty]: Start isEmpty. Operand 3237 states and 11507 transitions. [2021-06-06 00:02:55,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:02:55,883 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:02:55,883 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:02:56,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5792 [2021-06-06 00:02:56,084 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:02:56,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:02:56,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1396089209, now seen corresponding path program 65 times [2021-06-06 00:02:56,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:02:56,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717444039] [2021-06-06 00:02:56,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:02:56,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:02:56,119 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:02:56,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:02:56,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717444039] [2021-06-06 00:02:56,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717444039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:02:56,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95000740] [2021-06-06 00:02:56,119 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:02:56,145 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:02:56,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:02:56,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:02:56,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:02:56,239 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:02:56,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95000740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:02:56,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:02:56,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-06 00:02:56,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865592747] [2021-06-06 00:02:56,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:02:56,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:02:56,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:02:56,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:02:56,240 INFO L87 Difference]: Start difference. First operand 3237 states and 11507 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:02:56,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:02:56,921 INFO L93 Difference]: Finished difference Result 5511 states and 17519 transitions. [2021-06-06 00:02:56,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-06 00:02:56,922 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:02:56,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:02:56,929 INFO L225 Difference]: With dead ends: 5511 [2021-06-06 00:02:56,929 INFO L226 Difference]: Without dead ends: 5480 [2021-06-06 00:02:56,929 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 453.6ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-06-06 00:02:56,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5480 states. [2021-06-06 00:02:56,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5480 to 3230. [2021-06-06 00:02:56,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3230 states, 3229 states have (on average 3.562403220811397) internal successors, (11503), 3229 states have internal predecessors, (11503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:02:56,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3230 states to 3230 states and 11503 transitions. [2021-06-06 00:02:56,984 INFO L78 Accepts]: Start accepts. Automaton has 3230 states and 11503 transitions. Word has length 28 [2021-06-06 00:02:56,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:02:56,984 INFO L482 AbstractCegarLoop]: Abstraction has 3230 states and 11503 transitions. [2021-06-06 00:02:56,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:02:56,984 INFO L276 IsEmpty]: Start isEmpty. Operand 3230 states and 11503 transitions. [2021-06-06 00:02:56,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:02:56,988 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:02:56,988 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:02:57,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5793 [2021-06-06 00:02:57,189 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:02:57,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:02:57,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1850079165, now seen corresponding path program 66 times [2021-06-06 00:02:57,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:02:57,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572059433] [2021-06-06 00:02:57,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:02:57,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:02:57,231 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:02:57,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:02:57,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572059433] [2021-06-06 00:02:57,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572059433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:02:57,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101113910] [2021-06-06 00:02:57,232 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:02:57,259 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:02:57,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:02:57,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:02:57,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:02:57,330 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:02:57,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101113910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:02:57,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:02:57,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-06 00:02:57,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71318983] [2021-06-06 00:02:57,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:02:57,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:02:57,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:02:57,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:02:57,331 INFO L87 Difference]: Start difference. First operand 3230 states and 11503 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-06 00:02:57,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:02:57,901 INFO L93 Difference]: Finished difference Result 6692 states and 21656 transitions. [2021-06-06 00:02:57,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-06 00:02:57,901 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 28 [2021-06-06 00:02:57,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:02:57,910 INFO L225 Difference]: With dead ends: 6692 [2021-06-06 00:02:57,910 INFO L226 Difference]: Without dead ends: 6645 [2021-06-06 00:02:57,911 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 331.6ms TimeCoverageRelationStatistics Valid=455, Invalid=1267, Unknown=0, NotChecked=0, Total=1722 [2021-06-06 00:02:57,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6645 states. [2021-06-06 00:02:57,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6645 to 3393. [2021-06-06 00:02:57,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3393 states, 3392 states have (on average 3.608490566037736) internal successors, (12240), 3392 states have internal predecessors, (12240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:02:57,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3393 states to 3393 states and 12240 transitions. [2021-06-06 00:02:57,977 INFO L78 Accepts]: Start accepts. Automaton has 3393 states and 12240 transitions. Word has length 28 [2021-06-06 00:02:57,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:02:57,977 INFO L482 AbstractCegarLoop]: Abstraction has 3393 states and 12240 transitions. [2021-06-06 00:02:57,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-06 00:02:57,978 INFO L276 IsEmpty]: Start isEmpty. Operand 3393 states and 12240 transitions. [2021-06-06 00:02:57,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:02:57,982 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:02:57,982 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:02:58,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5794 [2021-06-06 00:02:58,183 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:02:58,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:02:58,183 INFO L82 PathProgramCache]: Analyzing trace with hash -361109379, now seen corresponding path program 67 times [2021-06-06 00:02:58,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:02:58,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477379903] [2021-06-06 00:02:58,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:02:58,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:02:58,229 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:02:58,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:02:58,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477379903] [2021-06-06 00:02:58,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477379903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:02:58,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776889418] [2021-06-06 00:02:58,229 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:02:58,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:02:58,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:02:58,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:02:58,314 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:02:58,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776889418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:02:58,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:02:58,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-06 00:02:58,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509548756] [2021-06-06 00:02:58,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-06 00:02:58,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:02:58,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-06 00:02:58,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-06 00:02:58,315 INFO L87 Difference]: Start difference. First operand 3393 states and 12240 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:02:58,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:02:58,480 INFO L93 Difference]: Finished difference Result 5080 states and 16859 transitions. [2021-06-06 00:02:58,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-06 00:02:58,481 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:02:58,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:02:58,487 INFO L225 Difference]: With dead ends: 5080 [2021-06-06 00:02:58,487 INFO L226 Difference]: Without dead ends: 5080 [2021-06-06 00:02:58,487 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 136.9ms TimeCoverageRelationStatistics Valid=132, Invalid=210, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:02:58,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5080 states. [2021-06-06 00:02:58,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5080 to 3225. [2021-06-06 00:02:58,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3225 states, 3224 states have (on average 3.5688585607940446) internal successors, (11506), 3224 states have internal predecessors, (11506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:02:58,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3225 states to 3225 states and 11506 transitions. [2021-06-06 00:02:58,538 INFO L78 Accepts]: Start accepts. Automaton has 3225 states and 11506 transitions. Word has length 28 [2021-06-06 00:02:58,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:02:58,538 INFO L482 AbstractCegarLoop]: Abstraction has 3225 states and 11506 transitions. [2021-06-06 00:02:58,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:02:58,538 INFO L276 IsEmpty]: Start isEmpty. Operand 3225 states and 11506 transitions. [2021-06-06 00:02:58,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:02:58,542 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:02:58,542 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:02:58,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5795 [2021-06-06 00:02:58,743 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:02:58,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:02:58,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1707790945, now seen corresponding path program 68 times [2021-06-06 00:02:58,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:02:58,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240369804] [2021-06-06 00:02:58,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:02:58,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:02:58,795 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:02:58,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:02:58,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240369804] [2021-06-06 00:02:58,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240369804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:02:58,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581688023] [2021-06-06 00:02:58,796 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:02:58,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:02:58,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:02:58,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:02:58,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:02:58,895 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:02:58,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581688023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:02:58,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:02:58,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-06 00:02:58,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098949039] [2021-06-06 00:02:58,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:02:58,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:02:58,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:02:58,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:02:58,896 INFO L87 Difference]: Start difference. First operand 3225 states and 11506 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:02:59,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:02:59,572 INFO L93 Difference]: Finished difference Result 7140 states and 22841 transitions. [2021-06-06 00:02:59,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-06 00:02:59,572 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:02:59,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:02:59,582 INFO L225 Difference]: With dead ends: 7140 [2021-06-06 00:02:59,583 INFO L226 Difference]: Without dead ends: 7140 [2021-06-06 00:02:59,583 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 394.3ms TimeCoverageRelationStatistics Valid=552, Invalid=1800, Unknown=0, NotChecked=0, Total=2352 [2021-06-06 00:02:59,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7140 states. [2021-06-06 00:02:59,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7140 to 3255. [2021-06-06 00:02:59,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3255 states, 3254 states have (on average 3.5682237246465887) internal successors, (11611), 3254 states have internal predecessors, (11611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:02:59,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3255 states to 3255 states and 11611 transitions. [2021-06-06 00:02:59,655 INFO L78 Accepts]: Start accepts. Automaton has 3255 states and 11611 transitions. Word has length 28 [2021-06-06 00:02:59,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:02:59,656 INFO L482 AbstractCegarLoop]: Abstraction has 3255 states and 11611 transitions. [2021-06-06 00:02:59,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:02:59,656 INFO L276 IsEmpty]: Start isEmpty. Operand 3255 states and 11611 transitions. [2021-06-06 00:02:59,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:02:59,660 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:02:59,660 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:02:59,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5796,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:02:59,861 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:02:59,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:02:59,861 INFO L82 PathProgramCache]: Analyzing trace with hash -922876851, now seen corresponding path program 69 times [2021-06-06 00:02:59,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:02:59,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617227512] [2021-06-06 00:02:59,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:02:59,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:02:59,896 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:02:59,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:02:59,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617227512] [2021-06-06 00:02:59,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617227512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:02:59,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513775897] [2021-06-06 00:02:59,897 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:02:59,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-06 00:02:59,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:02:59,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:02:59,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:02:59,998 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:02:59,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513775897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:02:59,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:02:59,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-06 00:02:59,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739680969] [2021-06-06 00:02:59,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:02:59,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:02:59,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:02:59,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:02:59,999 INFO L87 Difference]: Start difference. First operand 3255 states and 11611 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:00,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:03:00,797 INFO L93 Difference]: Finished difference Result 7432 states and 23809 transitions. [2021-06-06 00:03:00,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-06 00:03:00,797 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:03:00,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:03:00,808 INFO L225 Difference]: With dead ends: 7432 [2021-06-06 00:03:00,808 INFO L226 Difference]: Without dead ends: 7432 [2021-06-06 00:03:00,809 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 438.8ms TimeCoverageRelationStatistics Valid=634, Invalid=2336, Unknown=0, NotChecked=0, Total=2970 [2021-06-06 00:03:00,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7432 states. [2021-06-06 00:03:00,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7432 to 3385. [2021-06-06 00:03:00,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3385 states, 3384 states have (on average 3.551418439716312) internal successors, (12018), 3384 states have internal predecessors, (12018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:00,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3385 states to 3385 states and 12018 transitions. [2021-06-06 00:03:00,886 INFO L78 Accepts]: Start accepts. Automaton has 3385 states and 12018 transitions. Word has length 28 [2021-06-06 00:03:00,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:03:00,887 INFO L482 AbstractCegarLoop]: Abstraction has 3385 states and 12018 transitions. [2021-06-06 00:03:00,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:00,887 INFO L276 IsEmpty]: Start isEmpty. Operand 3385 states and 12018 transitions. [2021-06-06 00:03:00,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:03:00,891 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:03:00,891 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:03:01,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5797,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:03:01,091 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:03:01,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:03:01,092 INFO L82 PathProgramCache]: Analyzing trace with hash -2005899507, now seen corresponding path program 70 times [2021-06-06 00:03:01,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:03:01,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155768771] [2021-06-06 00:03:01,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:03:01,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:03:01,128 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:01,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:03:01,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155768771] [2021-06-06 00:03:01,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155768771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:01,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21826230] [2021-06-06 00:03:01,128 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:03:01,153 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:03:01,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:03:01,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:03:01,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:03:01,224 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:01,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21826230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:01,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:03:01,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-06 00:03:01,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921433413] [2021-06-06 00:03:01,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:03:01,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:03:01,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:03:01,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:03:01,225 INFO L87 Difference]: Start difference. First operand 3385 states and 12018 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-06 00:03:01,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:03:01,860 INFO L93 Difference]: Finished difference Result 7940 states and 25456 transitions. [2021-06-06 00:03:01,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-06 00:03:01,861 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 28 [2021-06-06 00:03:01,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:03:01,872 INFO L225 Difference]: With dead ends: 7940 [2021-06-06 00:03:01,873 INFO L226 Difference]: Without dead ends: 7927 [2021-06-06 00:03:01,873 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 377.6ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-06-06 00:03:01,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7927 states. [2021-06-06 00:03:01,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7927 to 4042. [2021-06-06 00:03:01,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4042 states, 4041 states have (on average 3.5921801534273694) internal successors, (14516), 4041 states have internal predecessors, (14516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:01,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4042 states to 4042 states and 14516 transitions. [2021-06-06 00:03:01,957 INFO L78 Accepts]: Start accepts. Automaton has 4042 states and 14516 transitions. Word has length 28 [2021-06-06 00:03:01,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:03:01,957 INFO L482 AbstractCegarLoop]: Abstraction has 4042 states and 14516 transitions. [2021-06-06 00:03:01,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-06 00:03:01,957 INFO L276 IsEmpty]: Start isEmpty. Operand 4042 states and 14516 transitions. [2021-06-06 00:03:01,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:03:01,962 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:03:01,962 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:03:02,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5798,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:03:02,163 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:03:02,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:03:02,163 INFO L82 PathProgramCache]: Analyzing trace with hash -534821389, now seen corresponding path program 71 times [2021-06-06 00:03:02,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:03:02,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690287576] [2021-06-06 00:03:02,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:03:02,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:03:02,202 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:02,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:03:02,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690287576] [2021-06-06 00:03:02,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690287576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:02,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051222670] [2021-06-06 00:03:02,202 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:03:02,227 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:03:02,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:03:02,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:03:02,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:03:02,303 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:02,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051222670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:02,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:03:02,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-06 00:03:02,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625455248] [2021-06-06 00:03:02,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:03:02,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:03:02,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:03:02,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:03:02,304 INFO L87 Difference]: Start difference. First operand 4042 states and 14516 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-06 00:03:02,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:03:02,924 INFO L93 Difference]: Finished difference Result 8192 states and 26150 transitions. [2021-06-06 00:03:02,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-06 00:03:02,924 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 28 [2021-06-06 00:03:02,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:03:02,935 INFO L225 Difference]: With dead ends: 8192 [2021-06-06 00:03:02,935 INFO L226 Difference]: Without dead ends: 8192 [2021-06-06 00:03:02,936 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 383.4ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-06-06 00:03:02,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8192 states. [2021-06-06 00:03:03,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8192 to 3795. [2021-06-06 00:03:03,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3795 states, 3794 states have (on average 3.5579862941486557) internal successors, (13499), 3794 states have internal predecessors, (13499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:03,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3795 states to 3795 states and 13499 transitions. [2021-06-06 00:03:03,018 INFO L78 Accepts]: Start accepts. Automaton has 3795 states and 13499 transitions. Word has length 28 [2021-06-06 00:03:03,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:03:03,018 INFO L482 AbstractCegarLoop]: Abstraction has 3795 states and 13499 transitions. [2021-06-06 00:03:03,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-06 00:03:03,018 INFO L276 IsEmpty]: Start isEmpty. Operand 3795 states and 13499 transitions. [2021-06-06 00:03:03,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:03:03,023 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:03:03,023 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:03:03,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5799,143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:03:03,223 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:03:03,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:03:03,224 INFO L82 PathProgramCache]: Analyzing trace with hash -967697993, now seen corresponding path program 72 times [2021-06-06 00:03:03,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:03:03,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470340689] [2021-06-06 00:03:03,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:03:03,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:03:03,264 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:03,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:03:03,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470340689] [2021-06-06 00:03:03,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470340689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:03,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269693834] [2021-06-06 00:03:03,265 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:03:03,293 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-06 00:03:03,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:03:03,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:03:03,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:03:03,368 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:03,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269693834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:03,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:03:03,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-06 00:03:03,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343272280] [2021-06-06 00:03:03,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:03:03,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:03:03,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:03:03,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:03:03,369 INFO L87 Difference]: Start difference. First operand 3795 states and 13499 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:04,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:03:04,073 INFO L93 Difference]: Finished difference Result 7285 states and 23940 transitions. [2021-06-06 00:03:04,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-06 00:03:04,074 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:03:04,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:03:04,084 INFO L225 Difference]: With dead ends: 7285 [2021-06-06 00:03:04,085 INFO L226 Difference]: Without dead ends: 7281 [2021-06-06 00:03:04,085 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 412.4ms TimeCoverageRelationStatistics Valid=600, Invalid=2052, Unknown=0, NotChecked=0, Total=2652 [2021-06-06 00:03:04,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7281 states. [2021-06-06 00:03:04,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7281 to 3428. [2021-06-06 00:03:04,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3428 states, 3427 states have (on average 3.604610446454625) internal successors, (12353), 3427 states have internal predecessors, (12353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:04,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3428 states to 3428 states and 12353 transitions. [2021-06-06 00:03:04,187 INFO L78 Accepts]: Start accepts. Automaton has 3428 states and 12353 transitions. Word has length 28 [2021-06-06 00:03:04,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:03:04,187 INFO L482 AbstractCegarLoop]: Abstraction has 3428 states and 12353 transitions. [2021-06-06 00:03:04,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:04,187 INFO L276 IsEmpty]: Start isEmpty. Operand 3428 states and 12353 transitions. [2021-06-06 00:03:04,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:03:04,192 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:03:04,192 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:03:04,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5800,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:03:04,397 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:03:04,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:03:04,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1239707183, now seen corresponding path program 73 times [2021-06-06 00:03:04,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:03:04,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595591321] [2021-06-06 00:03:04,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:03:04,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:03:04,435 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:04,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:03:04,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595591321] [2021-06-06 00:03:04,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595591321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:04,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199712127] [2021-06-06 00:03:04,435 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:03:04,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:03:04,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:03:04,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:03:04,556 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:04,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199712127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:04,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:03:04,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-06 00:03:04,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104869192] [2021-06-06 00:03:04,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:03:04,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:03:04,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:03:04,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:03:04,557 INFO L87 Difference]: Start difference. First operand 3428 states and 12353 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:05,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:03:05,649 INFO L93 Difference]: Finished difference Result 11601 states and 38335 transitions. [2021-06-06 00:03:05,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-06 00:03:05,649 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:03:05,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:03:05,667 INFO L225 Difference]: With dead ends: 11601 [2021-06-06 00:03:05,667 INFO L226 Difference]: Without dead ends: 11601 [2021-06-06 00:03:05,668 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 616.2ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-06-06 00:03:05,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11601 states. [2021-06-06 00:03:05,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11601 to 3716. [2021-06-06 00:03:05,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3716 states, 3715 states have (on average 3.6855989232839836) internal successors, (13692), 3715 states have internal predecessors, (13692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:05,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3716 states to 3716 states and 13692 transitions. [2021-06-06 00:03:05,781 INFO L78 Accepts]: Start accepts. Automaton has 3716 states and 13692 transitions. Word has length 28 [2021-06-06 00:03:05,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:03:05,781 INFO L482 AbstractCegarLoop]: Abstraction has 3716 states and 13692 transitions. [2021-06-06 00:03:05,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:05,781 INFO L276 IsEmpty]: Start isEmpty. Operand 3716 states and 13692 transitions. [2021-06-06 00:03:05,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:03:05,786 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:03:05,786 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:03:05,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5801 [2021-06-06 00:03:05,986 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:03:05,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:03:05,987 INFO L82 PathProgramCache]: Analyzing trace with hash -672755103, now seen corresponding path program 74 times [2021-06-06 00:03:05,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:03:05,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027132580] [2021-06-06 00:03:05,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:03:05,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:03:06,023 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:06,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:03:06,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027132580] [2021-06-06 00:03:06,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027132580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:06,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150183289] [2021-06-06 00:03:06,023 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:03:06,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:03:06,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:03:06,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:03:06,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:03:06,142 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:06,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150183289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:06,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:03:06,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-06 00:03:06,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370652542] [2021-06-06 00:03:06,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:03:06,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:03:06,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:03:06,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:03:06,143 INFO L87 Difference]: Start difference. First operand 3716 states and 13692 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:07,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:03:07,206 INFO L93 Difference]: Finished difference Result 11295 states and 37518 transitions. [2021-06-06 00:03:07,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-06 00:03:07,207 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:03:07,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:03:07,225 INFO L225 Difference]: With dead ends: 11295 [2021-06-06 00:03:07,225 INFO L226 Difference]: Without dead ends: 11295 [2021-06-06 00:03:07,226 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1729 ImplicationChecksByTransitivity, 619.9ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-06-06 00:03:07,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11295 states. [2021-06-06 00:03:07,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11295 to 3670. [2021-06-06 00:03:07,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3670 states, 3669 states have (on average 3.666121559007904) internal successors, (13451), 3669 states have internal predecessors, (13451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:07,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3670 states to 3670 states and 13451 transitions. [2021-06-06 00:03:07,355 INFO L78 Accepts]: Start accepts. Automaton has 3670 states and 13451 transitions. Word has length 28 [2021-06-06 00:03:07,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:03:07,355 INFO L482 AbstractCegarLoop]: Abstraction has 3670 states and 13451 transitions. [2021-06-06 00:03:07,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:07,355 INFO L276 IsEmpty]: Start isEmpty. Operand 3670 states and 13451 transitions. [2021-06-06 00:03:07,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:03:07,360 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:03:07,360 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:03:07,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5802,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:03:07,561 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:03:07,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:03:07,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1845100961, now seen corresponding path program 75 times [2021-06-06 00:03:07,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:03:07,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661347400] [2021-06-06 00:03:07,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:03:07,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:03:07,595 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:07,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:03:07,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661347400] [2021-06-06 00:03:07,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661347400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:07,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761134739] [2021-06-06 00:03:07,595 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:03:07,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-06 00:03:07,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:03:07,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:03:07,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:03:07,703 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:07,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761134739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:07,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:03:07,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-06 00:03:07,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918160481] [2021-06-06 00:03:07,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:03:07,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:03:07,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:03:07,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:03:07,704 INFO L87 Difference]: Start difference. First operand 3670 states and 13451 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:08,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:03:08,617 INFO L93 Difference]: Finished difference Result 10610 states and 34061 transitions. [2021-06-06 00:03:08,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-06 00:03:08,618 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:03:08,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:03:08,633 INFO L225 Difference]: With dead ends: 10610 [2021-06-06 00:03:08,633 INFO L226 Difference]: Without dead ends: 10610 [2021-06-06 00:03:08,634 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1465 ImplicationChecksByTransitivity, 511.3ms TimeCoverageRelationStatistics Valid=821, Invalid=3085, Unknown=0, NotChecked=0, Total=3906 [2021-06-06 00:03:08,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10610 states. [2021-06-06 00:03:08,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10610 to 3710. [2021-06-06 00:03:08,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3710 states, 3709 states have (on average 3.6702615260177947) internal successors, (13613), 3709 states have internal predecessors, (13613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:08,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3710 states to 3710 states and 13613 transitions. [2021-06-06 00:03:08,739 INFO L78 Accepts]: Start accepts. Automaton has 3710 states and 13613 transitions. Word has length 28 [2021-06-06 00:03:08,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:03:08,739 INFO L482 AbstractCegarLoop]: Abstraction has 3710 states and 13613 transitions. [2021-06-06 00:03:08,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:08,739 INFO L276 IsEmpty]: Start isEmpty. Operand 3710 states and 13613 transitions. [2021-06-06 00:03:08,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:03:08,743 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:03:08,743 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:03:08,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5803,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:03:08,944 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:03:08,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:03:08,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1763724873, now seen corresponding path program 76 times [2021-06-06 00:03:08,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:03:08,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663547037] [2021-06-06 00:03:08,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:03:08,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:03:08,980 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:08,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:03:08,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663547037] [2021-06-06 00:03:08,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663547037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:08,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941358302] [2021-06-06 00:03:08,980 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:03:09,005 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:03:09,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:03:09,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:03:09,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:03:09,084 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:09,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941358302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:09,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:03:09,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-06 00:03:09,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031097886] [2021-06-06 00:03:09,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:03:09,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:03:09,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:03:09,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:03:09,085 INFO L87 Difference]: Start difference. First operand 3710 states and 13613 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:10,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:03:10,000 INFO L93 Difference]: Finished difference Result 9989 states and 32538 transitions. [2021-06-06 00:03:10,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-06 00:03:10,001 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:03:10,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:03:10,017 INFO L225 Difference]: With dead ends: 9989 [2021-06-06 00:03:10,017 INFO L226 Difference]: Without dead ends: 9981 [2021-06-06 00:03:10,018 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 500.2ms TimeCoverageRelationStatistics Valid=776, Invalid=2764, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:03:10,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9981 states. [2021-06-06 00:03:10,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9981 to 3676. [2021-06-06 00:03:10,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3676 states, 3675 states have (on average 3.6653061224489796) internal successors, (13470), 3675 states have internal predecessors, (13470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:10,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3676 states to 3676 states and 13470 transitions. [2021-06-06 00:03:10,149 INFO L78 Accepts]: Start accepts. Automaton has 3676 states and 13470 transitions. Word has length 28 [2021-06-06 00:03:10,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:03:10,149 INFO L482 AbstractCegarLoop]: Abstraction has 3676 states and 13470 transitions. [2021-06-06 00:03:10,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:10,149 INFO L276 IsEmpty]: Start isEmpty. Operand 3676 states and 13470 transitions. [2021-06-06 00:03:10,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:03:10,154 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:03:10,154 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:03:10,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5804,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:03:10,354 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:03:10,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:03:10,355 INFO L82 PathProgramCache]: Analyzing trace with hash -833067657, now seen corresponding path program 77 times [2021-06-06 00:03:10,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:03:10,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898916054] [2021-06-06 00:03:10,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:03:10,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:03:10,391 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:10,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:03:10,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898916054] [2021-06-06 00:03:10,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898916054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:10,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475099470] [2021-06-06 00:03:10,391 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:03:10,416 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-06 00:03:10,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:03:10,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:03:10,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:03:10,527 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:10,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475099470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:10,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:03:10,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-06 00:03:10,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439017398] [2021-06-06 00:03:10,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:03:10,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:03:10,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:03:10,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:03:10,528 INFO L87 Difference]: Start difference. First operand 3676 states and 13470 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:11,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:03:11,553 INFO L93 Difference]: Finished difference Result 9584 states and 31413 transitions. [2021-06-06 00:03:11,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-06 00:03:11,553 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:03:11,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:03:11,572 INFO L225 Difference]: With dead ends: 9584 [2021-06-06 00:03:11,572 INFO L226 Difference]: Without dead ends: 9584 [2021-06-06 00:03:11,573 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 565.8ms TimeCoverageRelationStatistics Valid=820, Invalid=2962, Unknown=0, NotChecked=0, Total=3782 [2021-06-06 00:03:11,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9584 states. [2021-06-06 00:03:11,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9584 to 3692. [2021-06-06 00:03:11,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3692 states, 3691 states have (on average 3.666756976429152) internal successors, (13534), 3691 states have internal predecessors, (13534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:11,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3692 states to 3692 states and 13534 transitions. [2021-06-06 00:03:11,684 INFO L78 Accepts]: Start accepts. Automaton has 3692 states and 13534 transitions. Word has length 28 [2021-06-06 00:03:11,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:03:11,684 INFO L482 AbstractCegarLoop]: Abstraction has 3692 states and 13534 transitions. [2021-06-06 00:03:11,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:11,684 INFO L276 IsEmpty]: Start isEmpty. Operand 3692 states and 13534 transitions. [2021-06-06 00:03:11,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:03:11,688 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:03:11,689 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:03:11,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5805 [2021-06-06 00:03:11,889 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:03:11,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:03:11,889 INFO L82 PathProgramCache]: Analyzing trace with hash 809971497, now seen corresponding path program 78 times [2021-06-06 00:03:11,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:03:11,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602956897] [2021-06-06 00:03:11,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:03:11,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:03:11,930 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:11,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:03:11,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602956897] [2021-06-06 00:03:11,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602956897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:11,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285892706] [2021-06-06 00:03:11,930 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:03:11,955 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-06 00:03:11,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:03:11,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:03:11,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:03:12,046 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:12,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285892706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:12,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:03:12,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-06 00:03:12,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265338472] [2021-06-06 00:03:12,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:03:12,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:03:12,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:03:12,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:03:12,047 INFO L87 Difference]: Start difference. First operand 3692 states and 13534 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:13,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:03:13,002 INFO L93 Difference]: Finished difference Result 9249 states and 30618 transitions. [2021-06-06 00:03:13,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-06 00:03:13,002 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:03:13,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:03:13,016 INFO L225 Difference]: With dead ends: 9249 [2021-06-06 00:03:13,016 INFO L226 Difference]: Without dead ends: 9241 [2021-06-06 00:03:13,017 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 535.9ms TimeCoverageRelationStatistics Valid=800, Invalid=2740, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:03:13,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9241 states. [2021-06-06 00:03:13,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9241 to 3360. [2021-06-06 00:03:13,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3360 states, 3359 states have (on average 3.5802322119678474) internal successors, (12026), 3359 states have internal predecessors, (12026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:13,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3360 states to 3360 states and 12026 transitions. [2021-06-06 00:03:13,104 INFO L78 Accepts]: Start accepts. Automaton has 3360 states and 12026 transitions. Word has length 28 [2021-06-06 00:03:13,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:03:13,104 INFO L482 AbstractCegarLoop]: Abstraction has 3360 states and 12026 transitions. [2021-06-06 00:03:13,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:13,104 INFO L276 IsEmpty]: Start isEmpty. Operand 3360 states and 12026 transitions. [2021-06-06 00:03:13,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:03:13,108 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:03:13,108 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:03:13,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5806 [2021-06-06 00:03:13,309 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:03:13,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:03:13,309 INFO L82 PathProgramCache]: Analyzing trace with hash 893375077, now seen corresponding path program 79 times [2021-06-06 00:03:13,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:03:13,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776582086] [2021-06-06 00:03:13,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:03:13,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:03:13,379 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:13,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:03:13,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776582086] [2021-06-06 00:03:13,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776582086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:13,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850392259] [2021-06-06 00:03:13,380 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:03:13,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:03:13,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:03:13,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:03:13,519 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:13,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850392259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:13,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:03:13,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-06 00:03:13,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850314887] [2021-06-06 00:03:13,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:03:13,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:03:13,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:03:13,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:03:13,520 INFO L87 Difference]: Start difference. First operand 3360 states and 12026 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:14,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:03:14,411 INFO L93 Difference]: Finished difference Result 7017 states and 22977 transitions. [2021-06-06 00:03:14,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-06 00:03:14,411 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:03:14,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:03:14,422 INFO L225 Difference]: With dead ends: 7017 [2021-06-06 00:03:14,422 INFO L226 Difference]: Without dead ends: 7017 [2021-06-06 00:03:14,422 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 567.2ms TimeCoverageRelationStatistics Valid=709, Invalid=2713, Unknown=0, NotChecked=0, Total=3422 [2021-06-06 00:03:14,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7017 states. [2021-06-06 00:03:14,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7017 to 3372. [2021-06-06 00:03:14,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3372 states, 3371 states have (on average 3.5787600118659153) internal successors, (12064), 3371 states have internal predecessors, (12064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:14,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3372 states to 3372 states and 12064 transitions. [2021-06-06 00:03:14,491 INFO L78 Accepts]: Start accepts. Automaton has 3372 states and 12064 transitions. Word has length 28 [2021-06-06 00:03:14,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:03:14,491 INFO L482 AbstractCegarLoop]: Abstraction has 3372 states and 12064 transitions. [2021-06-06 00:03:14,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:14,491 INFO L276 IsEmpty]: Start isEmpty. Operand 3372 states and 12064 transitions. [2021-06-06 00:03:14,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:03:14,496 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:03:14,496 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:03:14,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5807 [2021-06-06 00:03:14,696 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:03:14,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:03:14,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1748232043, now seen corresponding path program 80 times [2021-06-06 00:03:14,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:03:14,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120231382] [2021-06-06 00:03:14,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:03:14,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:03:14,732 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:14,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:03:14,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120231382] [2021-06-06 00:03:14,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120231382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:14,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757769276] [2021-06-06 00:03:14,733 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:03:14,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:03:14,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:03:14,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:03:14,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:03:14,870 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:14,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757769276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:14,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:03:14,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-06 00:03:14,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096924362] [2021-06-06 00:03:14,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:03:14,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:03:14,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:03:14,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:03:14,871 INFO L87 Difference]: Start difference. First operand 3372 states and 12064 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:15,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:03:15,952 INFO L93 Difference]: Finished difference Result 7945 states and 25366 transitions. [2021-06-06 00:03:15,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-06 00:03:15,952 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:03:15,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:03:15,964 INFO L225 Difference]: With dead ends: 7945 [2021-06-06 00:03:15,964 INFO L226 Difference]: Without dead ends: 7945 [2021-06-06 00:03:15,964 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1919 ImplicationChecksByTransitivity, 705.2ms TimeCoverageRelationStatistics Valid=1012, Invalid=4244, Unknown=0, NotChecked=0, Total=5256 [2021-06-06 00:03:15,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7945 states. [2021-06-06 00:03:16,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7945 to 3438. [2021-06-06 00:03:16,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3438 states, 3437 states have (on average 3.5731742798952575) internal successors, (12281), 3437 states have internal predecessors, (12281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:16,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3438 states to 3438 states and 12281 transitions. [2021-06-06 00:03:16,040 INFO L78 Accepts]: Start accepts. Automaton has 3438 states and 12281 transitions. Word has length 28 [2021-06-06 00:03:16,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:03:16,040 INFO L482 AbstractCegarLoop]: Abstraction has 3438 states and 12281 transitions. [2021-06-06 00:03:16,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:16,040 INFO L276 IsEmpty]: Start isEmpty. Operand 3438 states and 12281 transitions. [2021-06-06 00:03:16,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:03:16,044 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:03:16,044 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:03:16,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5808 [2021-06-06 00:03:16,245 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:03:16,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:03:16,245 INFO L82 PathProgramCache]: Analyzing trace with hash -105192889, now seen corresponding path program 81 times [2021-06-06 00:03:16,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:03:16,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913268222] [2021-06-06 00:03:16,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:03:16,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:03:16,281 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:16,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:03:16,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913268222] [2021-06-06 00:03:16,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913268222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:16,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993629161] [2021-06-06 00:03:16,282 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:03:16,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-06 00:03:16,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:03:16,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:03:16,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:03:16,408 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:16,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993629161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:16,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:03:16,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-06 00:03:16,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826241731] [2021-06-06 00:03:16,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:03:16,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:03:16,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:03:16,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:03:16,409 INFO L87 Difference]: Start difference. First operand 3438 states and 12281 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:17,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:03:17,424 INFO L93 Difference]: Finished difference Result 7328 states and 23738 transitions. [2021-06-06 00:03:17,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-06 00:03:17,424 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:03:17,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:03:17,435 INFO L225 Difference]: With dead ends: 7328 [2021-06-06 00:03:17,435 INFO L226 Difference]: Without dead ends: 7324 [2021-06-06 00:03:17,436 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1534 ImplicationChecksByTransitivity, 628.1ms TimeCoverageRelationStatistics Valid=914, Invalid=3508, Unknown=0, NotChecked=0, Total=4422 [2021-06-06 00:03:17,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7324 states. [2021-06-06 00:03:17,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7324 to 3373. [2021-06-06 00:03:17,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3373 states, 3372 states have (on average 3.5711743772241995) internal successors, (12042), 3372 states have internal predecessors, (12042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:17,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3373 states to 3373 states and 12042 transitions. [2021-06-06 00:03:17,508 INFO L78 Accepts]: Start accepts. Automaton has 3373 states and 12042 transitions. Word has length 28 [2021-06-06 00:03:17,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:03:17,508 INFO L482 AbstractCegarLoop]: Abstraction has 3373 states and 12042 transitions. [2021-06-06 00:03:17,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:17,508 INFO L276 IsEmpty]: Start isEmpty. Operand 3373 states and 12042 transitions. [2021-06-06 00:03:17,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:03:17,512 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:03:17,512 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:03:17,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5809 [2021-06-06 00:03:17,713 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:03:17,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:03:17,713 INFO L82 PathProgramCache]: Analyzing trace with hash 474250335, now seen corresponding path program 72 times [2021-06-06 00:03:17,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:03:17,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673486249] [2021-06-06 00:03:17,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:03:17,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:03:17,769 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:17,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:03:17,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673486249] [2021-06-06 00:03:17,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673486249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:17,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208689487] [2021-06-06 00:03:17,770 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:03:17,794 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:03:17,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:03:17,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:03:17,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:03:17,870 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:17,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208689487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:17,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:03:17,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-06 00:03:17,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213145981] [2021-06-06 00:03:17,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:03:17,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:03:17,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:03:17,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:03:17,871 INFO L87 Difference]: Start difference. First operand 3373 states and 12042 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:18,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:03:18,478 INFO L93 Difference]: Finished difference Result 6471 states and 21326 transitions. [2021-06-06 00:03:18,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-06 00:03:18,478 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:03:18,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:03:18,487 INFO L225 Difference]: With dead ends: 6471 [2021-06-06 00:03:18,487 INFO L226 Difference]: Without dead ends: 6471 [2021-06-06 00:03:18,488 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 343.1ms TimeCoverageRelationStatistics Valid=407, Invalid=1399, Unknown=0, NotChecked=0, Total=1806 [2021-06-06 00:03:18,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6471 states. [2021-06-06 00:03:18,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6471 to 3377. [2021-06-06 00:03:18,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3377 states, 3376 states have (on average 3.572867298578199) internal successors, (12062), 3376 states have internal predecessors, (12062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:18,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3377 states to 3377 states and 12062 transitions. [2021-06-06 00:03:18,547 INFO L78 Accepts]: Start accepts. Automaton has 3377 states and 12062 transitions. Word has length 28 [2021-06-06 00:03:18,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:03:18,547 INFO L482 AbstractCegarLoop]: Abstraction has 3377 states and 12062 transitions. [2021-06-06 00:03:18,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:18,547 INFO L276 IsEmpty]: Start isEmpty. Operand 3377 states and 12062 transitions. [2021-06-06 00:03:18,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:03:18,551 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:03:18,552 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:03:18,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5810,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:03:18,752 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:03:18,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:03:18,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1137549427, now seen corresponding path program 73 times [2021-06-06 00:03:18,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:03:18,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083070517] [2021-06-06 00:03:18,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:03:18,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:03:18,793 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:18,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:03:18,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083070517] [2021-06-06 00:03:18,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083070517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:18,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515943073] [2021-06-06 00:03:18,794 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:03:18,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:03:18,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:03:18,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:03:18,895 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:18,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515943073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:18,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:03:18,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-06 00:03:18,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553397567] [2021-06-06 00:03:18,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:03:18,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:03:18,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:03:18,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:03:18,896 INFO L87 Difference]: Start difference. First operand 3377 states and 12062 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:19,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:03:19,633 INFO L93 Difference]: Finished difference Result 6945 states and 22648 transitions. [2021-06-06 00:03:19,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-06 00:03:19,634 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:03:19,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:03:19,644 INFO L225 Difference]: With dead ends: 6945 [2021-06-06 00:03:19,644 INFO L226 Difference]: Without dead ends: 6945 [2021-06-06 00:03:19,644 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 454.0ms TimeCoverageRelationStatistics Valid=638, Invalid=2118, Unknown=0, NotChecked=0, Total=2756 [2021-06-06 00:03:19,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6945 states. [2021-06-06 00:03:19,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6945 to 3391. [2021-06-06 00:03:19,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3391 states, 3390 states have (on average 3.5702064896755163) internal successors, (12103), 3390 states have internal predecessors, (12103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:19,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3391 states to 3391 states and 12103 transitions. [2021-06-06 00:03:19,729 INFO L78 Accepts]: Start accepts. Automaton has 3391 states and 12103 transitions. Word has length 28 [2021-06-06 00:03:19,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:03:19,729 INFO L482 AbstractCegarLoop]: Abstraction has 3391 states and 12103 transitions. [2021-06-06 00:03:19,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:19,729 INFO L276 IsEmpty]: Start isEmpty. Operand 3391 states and 12103 transitions. [2021-06-06 00:03:19,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:03:19,733 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:03:19,733 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:03:19,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5811 [2021-06-06 00:03:19,934 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:03:19,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:03:19,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1369089075, now seen corresponding path program 74 times [2021-06-06 00:03:19,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:03:19,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197721818] [2021-06-06 00:03:19,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:03:19,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:03:19,975 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:19,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:03:19,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197721818] [2021-06-06 00:03:19,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197721818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:19,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860153282] [2021-06-06 00:03:19,975 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:03:19,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:03:19,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:03:20,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:03:20,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:03:20,094 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:20,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860153282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:20,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:03:20,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-06 00:03:20,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049216313] [2021-06-06 00:03:20,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:03:20,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:03:20,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:03:20,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:03:20,095 INFO L87 Difference]: Start difference. First operand 3391 states and 12103 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:21,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:03:21,006 INFO L93 Difference]: Finished difference Result 7449 states and 24075 transitions. [2021-06-06 00:03:21,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-06 00:03:21,007 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:03:21,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:03:21,017 INFO L225 Difference]: With dead ends: 7449 [2021-06-06 00:03:21,017 INFO L226 Difference]: Without dead ends: 7449 [2021-06-06 00:03:21,018 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1316 ImplicationChecksByTransitivity, 523.2ms TimeCoverageRelationStatistics Valid=777, Invalid=3005, Unknown=0, NotChecked=0, Total=3782 [2021-06-06 00:03:21,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7449 states. [2021-06-06 00:03:21,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7449 to 3471. [2021-06-06 00:03:21,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3471 states, 3470 states have (on average 3.563400576368876) internal successors, (12365), 3470 states have internal predecessors, (12365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:21,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3471 states to 3471 states and 12365 transitions. [2021-06-06 00:03:21,095 INFO L78 Accepts]: Start accepts. Automaton has 3471 states and 12365 transitions. Word has length 28 [2021-06-06 00:03:21,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:03:21,095 INFO L482 AbstractCegarLoop]: Abstraction has 3471 states and 12365 transitions. [2021-06-06 00:03:21,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:21,095 INFO L276 IsEmpty]: Start isEmpty. Operand 3471 states and 12365 transitions. [2021-06-06 00:03:21,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:03:21,099 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:03:21,099 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:03:21,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5812,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:03:21,300 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:03:21,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:03:21,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1349373261, now seen corresponding path program 75 times [2021-06-06 00:03:21,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:03:21,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613746591] [2021-06-06 00:03:21,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:03:21,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:03:21,334 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:21,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:03:21,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613746591] [2021-06-06 00:03:21,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613746591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:21,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456826400] [2021-06-06 00:03:21,334 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:03:21,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-06 00:03:21,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:03:21,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:03:21,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:03:21,453 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:21,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456826400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:21,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:03:21,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-06 00:03:21,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074245559] [2021-06-06 00:03:21,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:03:21,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:03:21,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:03:21,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:03:21,454 INFO L87 Difference]: Start difference. First operand 3471 states and 12365 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:22,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:03:22,000 INFO L93 Difference]: Finished difference Result 7261 states and 24833 transitions. [2021-06-06 00:03:22,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-06 00:03:22,001 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:03:22,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:03:22,011 INFO L225 Difference]: With dead ends: 7261 [2021-06-06 00:03:22,012 INFO L226 Difference]: Without dead ends: 7261 [2021-06-06 00:03:22,012 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 381.6ms TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2021-06-06 00:03:22,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7261 states. [2021-06-06 00:03:22,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7261 to 4582. [2021-06-06 00:03:22,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4582 states, 4581 states have (on average 3.6797642436149314) internal successors, (16857), 4581 states have internal predecessors, (16857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:22,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4582 states to 4582 states and 16857 transitions. [2021-06-06 00:03:22,094 INFO L78 Accepts]: Start accepts. Automaton has 4582 states and 16857 transitions. Word has length 28 [2021-06-06 00:03:22,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:03:22,094 INFO L482 AbstractCegarLoop]: Abstraction has 4582 states and 16857 transitions. [2021-06-06 00:03:22,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:22,094 INFO L276 IsEmpty]: Start isEmpty. Operand 4582 states and 16857 transitions. [2021-06-06 00:03:22,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:03:22,100 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:03:22,100 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:03:22,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5813,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:03:22,301 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:03:22,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:03:22,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1413910217, now seen corresponding path program 76 times [2021-06-06 00:03:22,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:03:22,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432033326] [2021-06-06 00:03:22,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:03:22,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:03:22,342 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:22,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:03:22,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432033326] [2021-06-06 00:03:22,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432033326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:22,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498189667] [2021-06-06 00:03:22,342 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:03:22,366 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:03:22,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:03:22,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:03:22,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:03:22,438 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:22,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498189667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:22,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:03:22,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-06 00:03:22,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873793619] [2021-06-06 00:03:22,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:03:22,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:03:22,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:03:22,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:03:22,439 INFO L87 Difference]: Start difference. First operand 4582 states and 16857 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:23,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:03:23,236 INFO L93 Difference]: Finished difference Result 8354 states and 28597 transitions. [2021-06-06 00:03:23,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-06 00:03:23,237 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:03:23,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:03:23,250 INFO L225 Difference]: With dead ends: 8354 [2021-06-06 00:03:23,250 INFO L226 Difference]: Without dead ends: 8350 [2021-06-06 00:03:23,250 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 479.2ms TimeCoverageRelationStatistics Valid=697, Invalid=2495, Unknown=0, NotChecked=0, Total=3192 [2021-06-06 00:03:23,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8350 states. [2021-06-06 00:03:23,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8350 to 4474. [2021-06-06 00:03:23,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4474 states, 4473 states have (on average 3.6908115358819584) internal successors, (16509), 4473 states have internal predecessors, (16509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:23,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4474 states to 4474 states and 16509 transitions. [2021-06-06 00:03:23,338 INFO L78 Accepts]: Start accepts. Automaton has 4474 states and 16509 transitions. Word has length 28 [2021-06-06 00:03:23,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:03:23,339 INFO L482 AbstractCegarLoop]: Abstraction has 4474 states and 16509 transitions. [2021-06-06 00:03:23,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:23,339 INFO L276 IsEmpty]: Start isEmpty. Operand 4474 states and 16509 transitions. [2021-06-06 00:03:23,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:03:23,344 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:03:23,344 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:03:23,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5814,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:03:23,545 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:03:23,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:03:23,545 INFO L82 PathProgramCache]: Analyzing trace with hash 606347251, now seen corresponding path program 82 times [2021-06-06 00:03:23,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:03:23,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791450533] [2021-06-06 00:03:23,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:03:23,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:03:23,573 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:23,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:03:23,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791450533] [2021-06-06 00:03:23,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791450533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:23,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631798737] [2021-06-06 00:03:23,574 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:03:23,597 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:03:23,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:03:23,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:03:23,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:03:23,681 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:23,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631798737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:23,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:03:23,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-06 00:03:23,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909024404] [2021-06-06 00:03:23,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:03:23,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:03:23,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:03:23,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:03:23,682 INFO L87 Difference]: Start difference. First operand 4474 states and 16509 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:24,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:03:24,537 INFO L93 Difference]: Finished difference Result 9509 states and 32189 transitions. [2021-06-06 00:03:24,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-06 00:03:24,538 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:03:24,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:03:24,553 INFO L225 Difference]: With dead ends: 9509 [2021-06-06 00:03:24,553 INFO L226 Difference]: Without dead ends: 9497 [2021-06-06 00:03:24,553 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 479.9ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-06-06 00:03:24,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9497 states. [2021-06-06 00:03:24,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9497 to 4945. [2021-06-06 00:03:24,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4945 states, 4944 states have (on average 3.7744741100323624) internal successors, (18661), 4944 states have internal predecessors, (18661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:24,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4945 states to 4945 states and 18661 transitions. [2021-06-06 00:03:24,655 INFO L78 Accepts]: Start accepts. Automaton has 4945 states and 18661 transitions. Word has length 28 [2021-06-06 00:03:24,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:03:24,655 INFO L482 AbstractCegarLoop]: Abstraction has 4945 states and 18661 transitions. [2021-06-06 00:03:24,655 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:24,655 INFO L276 IsEmpty]: Start isEmpty. Operand 4945 states and 18661 transitions. [2021-06-06 00:03:24,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:03:24,662 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:03:24,662 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:03:24,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5815 [2021-06-06 00:03:24,862 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:03:24,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:03:24,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1647278645, now seen corresponding path program 83 times [2021-06-06 00:03:24,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:03:24,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994759622] [2021-06-06 00:03:24,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:03:24,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:03:24,898 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:24,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:03:24,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994759622] [2021-06-06 00:03:24,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994759622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:24,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883450654] [2021-06-06 00:03:24,898 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:03:24,922 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:03:24,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:03:24,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:03:24,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:03:25,008 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:25,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883450654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:25,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:03:25,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-06 00:03:25,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718738908] [2021-06-06 00:03:25,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:03:25,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:03:25,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:03:25,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:03:25,009 INFO L87 Difference]: Start difference. First operand 4945 states and 18661 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:25,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:03:25,878 INFO L93 Difference]: Finished difference Result 9844 states and 33233 transitions. [2021-06-06 00:03:25,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-06 00:03:25,878 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:03:25,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:03:25,895 INFO L225 Difference]: With dead ends: 9844 [2021-06-06 00:03:25,895 INFO L226 Difference]: Without dead ends: 9844 [2021-06-06 00:03:25,895 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 489.3ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-06-06 00:03:25,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9844 states. [2021-06-06 00:03:25,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9844 to 4966. [2021-06-06 00:03:25,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4966 states, 4965 states have (on average 3.7593152064451156) internal successors, (18665), 4965 states have internal predecessors, (18665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:25,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4966 states to 4966 states and 18665 transitions. [2021-06-06 00:03:25,998 INFO L78 Accepts]: Start accepts. Automaton has 4966 states and 18665 transitions. Word has length 28 [2021-06-06 00:03:25,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:03:25,999 INFO L482 AbstractCegarLoop]: Abstraction has 4966 states and 18665 transitions. [2021-06-06 00:03:25,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:25,999 INFO L276 IsEmpty]: Start isEmpty. Operand 4966 states and 18665 transitions. [2021-06-06 00:03:26,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:03:26,005 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:03:26,005 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:03:26,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5816,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:03:26,206 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:03:26,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:03:26,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1444282361, now seen corresponding path program 84 times [2021-06-06 00:03:26,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:03:26,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20906412] [2021-06-06 00:03:26,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:03:26,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:03:26,240 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:26,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:03:26,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20906412] [2021-06-06 00:03:26,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20906412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:26,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800088772] [2021-06-06 00:03:26,240 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:03:26,264 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:03:26,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:03:26,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:03:26,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:03:26,325 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:26,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800088772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:26,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:03:26,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-06 00:03:26,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906272113] [2021-06-06 00:03:26,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:03:26,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:03:26,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:03:26,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:03:26,326 INFO L87 Difference]: Start difference. First operand 4966 states and 18665 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-06-06 00:03:26,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:03:26,740 INFO L93 Difference]: Finished difference Result 9292 states and 33167 transitions. [2021-06-06 00:03:26,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-06 00:03:26,741 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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 28 [2021-06-06 00:03:26,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:03:26,755 INFO L225 Difference]: With dead ends: 9292 [2021-06-06 00:03:26,756 INFO L226 Difference]: Without dead ends: 9209 [2021-06-06 00:03:26,756 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 235.4ms TimeCoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2021-06-06 00:03:26,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9209 states. [2021-06-06 00:03:26,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9209 to 6387. [2021-06-06 00:03:26,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6387 states, 6386 states have (on average 3.8042593172564985) internal successors, (24294), 6386 states have internal predecessors, (24294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:26,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6387 states to 6387 states and 24294 transitions. [2021-06-06 00:03:26,873 INFO L78 Accepts]: Start accepts. Automaton has 6387 states and 24294 transitions. Word has length 28 [2021-06-06 00:03:26,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:03:26,873 INFO L482 AbstractCegarLoop]: Abstraction has 6387 states and 24294 transitions. [2021-06-06 00:03:26,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 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) [2021-06-06 00:03:26,873 INFO L276 IsEmpty]: Start isEmpty. Operand 6387 states and 24294 transitions. [2021-06-06 00:03:26,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:03:26,882 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:03:26,883 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:03:27,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5817 [2021-06-06 00:03:27,083 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:03:27,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:03:27,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1642669955, now seen corresponding path program 85 times [2021-06-06 00:03:27,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:03:27,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967931003] [2021-06-06 00:03:27,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:03:27,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:03:27,110 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:03:27,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:03:27,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967931003] [2021-06-06 00:03:27,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967931003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:27,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921260762] [2021-06-06 00:03:27,111 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:03:27,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:03:27,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:03:27,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:03:27,187 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:03:27,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921260762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:27,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:03:27,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-06-06 00:03:27,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523967797] [2021-06-06 00:03:27,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-06 00:03:27,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:03:27,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-06 00:03:27,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-06 00:03:27,188 INFO L87 Difference]: Start difference. First operand 6387 states and 24294 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:27,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:03:27,374 INFO L93 Difference]: Finished difference Result 8813 states and 31347 transitions. [2021-06-06 00:03:27,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-06 00:03:27,374 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:03:27,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:03:27,389 INFO L225 Difference]: With dead ends: 8813 [2021-06-06 00:03:27,389 INFO L226 Difference]: Without dead ends: 8813 [2021-06-06 00:03:27,389 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 117.1ms TimeCoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:03:27,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8813 states. [2021-06-06 00:03:27,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8813 to 6533. [2021-06-06 00:03:27,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6533 states, 6532 states have (on average 3.7819963257807716) internal successors, (24704), 6532 states have internal predecessors, (24704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:27,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6533 states to 6533 states and 24704 transitions. [2021-06-06 00:03:27,499 INFO L78 Accepts]: Start accepts. Automaton has 6533 states and 24704 transitions. Word has length 28 [2021-06-06 00:03:27,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:03:27,499 INFO L482 AbstractCegarLoop]: Abstraction has 6533 states and 24704 transitions. [2021-06-06 00:03:27,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:27,500 INFO L276 IsEmpty]: Start isEmpty. Operand 6533 states and 24704 transitions. [2021-06-06 00:03:27,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:03:27,509 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:03:27,509 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:03:27,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5818,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:03:27,710 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:03:27,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:03:27,710 INFO L82 PathProgramCache]: Analyzing trace with hash -712470211, now seen corresponding path program 86 times [2021-06-06 00:03:27,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:03:27,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018757628] [2021-06-06 00:03:27,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:03:27,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:03:27,753 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:27,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:03:27,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018757628] [2021-06-06 00:03:27,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018757628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:27,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089365009] [2021-06-06 00:03:27,754 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:03:27,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:03:27,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:03:27,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:03:27,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:03:27,842 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:27,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089365009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:27,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:03:27,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-06 00:03:27,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634817383] [2021-06-06 00:03:27,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:03:27,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:03:27,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:03:27,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:03:27,843 INFO L87 Difference]: Start difference. First operand 6533 states and 24704 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-06-06 00:03:28,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:03:28,619 INFO L93 Difference]: Finished difference Result 13541 states and 47408 transitions. [2021-06-06 00:03:28,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-06 00:03:28,620 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 28 [2021-06-06 00:03:28,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:03:28,644 INFO L225 Difference]: With dead ends: 13541 [2021-06-06 00:03:28,644 INFO L226 Difference]: Without dead ends: 13541 [2021-06-06 00:03:28,645 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 978 ImplicationChecksByTransitivity, 442.1ms TimeCoverageRelationStatistics Valid=657, Invalid=2205, Unknown=0, NotChecked=0, Total=2862 [2021-06-06 00:03:28,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13541 states. [2021-06-06 00:03:28,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13541 to 7282. [2021-06-06 00:03:28,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7282 states, 7281 states have (on average 3.7915121549237742) internal successors, (27606), 7281 states have internal predecessors, (27606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:28,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7282 states to 7282 states and 27606 transitions. [2021-06-06 00:03:28,816 INFO L78 Accepts]: Start accepts. Automaton has 7282 states and 27606 transitions. Word has length 28 [2021-06-06 00:03:28,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:03:28,817 INFO L482 AbstractCegarLoop]: Abstraction has 7282 states and 27606 transitions. [2021-06-06 00:03:28,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2021-06-06 00:03:28,817 INFO L276 IsEmpty]: Start isEmpty. Operand 7282 states and 27606 transitions. [2021-06-06 00:03:28,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:03:28,827 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:03:28,827 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:03:29,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5819 [2021-06-06 00:03:29,028 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:03:29,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:03:29,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1190209241, now seen corresponding path program 87 times [2021-06-06 00:03:29,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:03:29,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797096092] [2021-06-06 00:03:29,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:03:29,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:03:29,063 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:29,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:03:29,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797096092] [2021-06-06 00:03:29,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797096092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:29,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537959587] [2021-06-06 00:03:29,063 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:03:29,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-06 00:03:29,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:03:29,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-06 00:03:29,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:03:29,152 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:29,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537959587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:29,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:03:29,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-06 00:03:29,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714696922] [2021-06-06 00:03:29,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:03:29,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:03:29,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:03:29,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:03:29,153 INFO L87 Difference]: Start difference. First operand 7282 states and 27606 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:29,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:03:29,822 INFO L93 Difference]: Finished difference Result 13742 states and 48131 transitions. [2021-06-06 00:03:29,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-06 00:03:29,823 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:03:29,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:03:29,848 INFO L225 Difference]: With dead ends: 13742 [2021-06-06 00:03:29,848 INFO L226 Difference]: Without dead ends: 13742 [2021-06-06 00:03:29,849 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 374.2ms TimeCoverageRelationStatistics Valid=542, Invalid=1908, Unknown=0, NotChecked=0, Total=2450 [2021-06-06 00:03:29,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13742 states. [2021-06-06 00:03:30,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13742 to 7548. [2021-06-06 00:03:30,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7548 states, 7547 states have (on average 3.7695773154895984) internal successors, (28449), 7547 states have internal predecessors, (28449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:30,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7548 states to 7548 states and 28449 transitions. [2021-06-06 00:03:30,026 INFO L78 Accepts]: Start accepts. Automaton has 7548 states and 28449 transitions. Word has length 28 [2021-06-06 00:03:30,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:03:30,026 INFO L482 AbstractCegarLoop]: Abstraction has 7548 states and 28449 transitions. [2021-06-06 00:03:30,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:30,027 INFO L276 IsEmpty]: Start isEmpty. Operand 7548 states and 28449 transitions. [2021-06-06 00:03:30,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:03:30,038 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:03:30,038 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:03:30,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5820 [2021-06-06 00:03:30,239 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:03:30,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:03:30,239 INFO L82 PathProgramCache]: Analyzing trace with hash 107186585, now seen corresponding path program 88 times [2021-06-06 00:03:30,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:03:30,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437488049] [2021-06-06 00:03:30,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:03:30,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:03:30,266 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:30,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:03:30,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437488049] [2021-06-06 00:03:30,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437488049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:30,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538325374] [2021-06-06 00:03:30,267 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:03:30,291 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:03:30,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:03:30,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:03:30,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:03:30,350 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:03:30,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538325374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:03:30,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:03:30,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-06 00:03:30,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123555632] [2021-06-06 00:03:30,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:03:30,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:03:30,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:03:30,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:03:30,351 INFO L87 Difference]: Start difference. First operand 7548 states and 28449 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:03:30,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:03:30,717 INFO L93 Difference]: Finished difference Result 10106 states and 36610 transitions. [2021-06-06 00:03:30,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-06 00:03:30,718 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-06 00:03:30,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:03:30,735 INFO L225 Difference]: With dead ends: 10106 [2021-06-06 00:03:30,735 INFO L226 Difference]: Without dead ends: 10076 [2021-06-06 00:03:30,735 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 187.4ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-06-06 00:03:30,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10076 states. Received shutdown request... [2021-06-06 00:03:31,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5821,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:03:31,010 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-06 00:03:31,012 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-06 00:03:31,013 WARN L196 ceAbstractionStarter]: Timeout [2021-06-06 00:03:31,013 INFO L202 PluginConnector]: Adding new model dot-product-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.06 12:03:31 BasicIcfg [2021-06-06 00:03:31,013 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-06 00:03:31,014 INFO L168 Benchmark]: Toolchain (without parser) took 843196.66 ms. Allocated memory was 360.7 MB in the beginning and 1.3 GB in the end (delta: 943.7 MB). Free memory was 340.2 MB in the beginning and 1.2 GB in the end (delta: -884.8 MB). Peak memory consumption was 807.7 MB. Max. memory is 16.0 GB. [2021-06-06 00:03:31,014 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 360.7 MB. Free memory was 341.4 MB in the beginning and 341.3 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-06 00:03:31,014 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.43 ms. Allocated memory is still 360.7 MB. Free memory was 340.1 MB in the beginning and 338.7 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-06 00:03:31,014 INFO L168 Benchmark]: Boogie Preprocessor took 16.16 ms. Allocated memory is still 360.7 MB. Free memory was 338.7 MB in the beginning and 337.7 MB in the end (delta: 956.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-06 00:03:31,014 INFO L168 Benchmark]: RCFGBuilder took 227.53 ms. Allocated memory is still 360.7 MB. Free memory was 337.6 MB in the beginning and 324.5 MB in the end (delta: 13.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-06-06 00:03:31,014 INFO L168 Benchmark]: TraceAbstraction took 842924.44 ms. Allocated memory was 360.7 MB in the beginning and 1.3 GB in the end (delta: 943.7 MB). Free memory was 324.0 MB in the beginning and 1.2 GB in the end (delta: -901.0 MB). Peak memory consumption was 793.0 MB. Max. memory is 16.0 GB. [2021-06-06 00:03:31,015 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 360.7 MB. Free memory was 341.4 MB in the beginning and 341.3 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 23.43 ms. Allocated memory is still 360.7 MB. Free memory was 340.1 MB in the beginning and 338.7 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 16.16 ms. Allocated memory is still 360.7 MB. Free memory was 338.7 MB in the beginning and 337.7 MB in the end (delta: 956.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 227.53 ms. Allocated memory is still 360.7 MB. Free memory was 337.6 MB in the beginning and 324.5 MB in the end (delta: 13.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 842924.44 ms. Allocated memory was 360.7 MB in the beginning and 1.3 GB in the end (delta: 943.7 MB). Free memory was 324.0 MB in the beginning and 1.2 GB in the end (delta: -901.0 MB). Peak memory consumption was 793.0 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 67]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while executing MinimizeSevpa. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 42 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 842841.3ms, OverallIterations: 167, TraceHistogramMax: 3, EmptinessCheckTime: 432.6ms, AutomataDifference: 638287.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 27.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 7471 SDtfs, 36873 SDslu, 53812 SDs, 0 SdLazy, 94537 SolverSat, 6140 SolverUnsat, 287 SolverUnknown, 0 SolverNotchecked, 413287.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9564 GetRequests, 3257 SyntacticMatches, 228 SemanticMatches, 6079 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81121 ImplicationChecksByTransitivity, 296845.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=7548occurred in iteration=166, InterpolantAutomatonStates: 5033, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 5858.9ms AutomataMinimizationTime, 167 MinimizatonAttempts, 238233 StatesRemovedByMinimization, 166 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 592.1ms SsaConstructionTime, 1648.4ms SatisfiabilityAnalysisTime, 158517.3ms InterpolantComputationTime, 8570 NumberOfCodeBlocks, 8570 NumberOfCodeBlocksAsserted, 548 NumberOfCheckSat, 8239 ConstructedInterpolants, 128 QuantifiedInterpolants, 122711 SizeOfPredicates, 979 NumberOfNonLiveVariables, 10804 ConjunctsInSsa, 2892 ConjunctsInUnsatCore, 331 InterpolantComputations, 3 PerfectInterpolantSequences, 352/2350 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown