/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/simple-queue.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-05 23:14:00,104 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 23:14:00,106 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 23:14:00,144 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-05 23:14:00,145 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-05 23:14:00,146 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-05 23:14:00,147 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-05 23:14:00,149 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-05 23:14:00,150 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-05 23:14:00,151 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-05 23:14:00,152 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-05 23:14:00,153 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-05 23:14:00,153 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-05 23:14:00,154 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-05 23:14:00,155 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-05 23:14:00,156 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-05 23:14:00,157 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-05 23:14:00,157 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-05 23:14:00,159 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-05 23:14:00,160 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-05 23:14:00,161 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-05 23:14:00,165 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-05 23:14:00,166 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-05 23:14:00,167 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-05 23:14:00,169 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-06-05 23:14:00,169 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-06-05 23:14:00,169 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-06-05 23:14:00,170 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-06-05 23:14:00,170 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-06-05 23:14:00,171 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-06-05 23:14:00,171 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-06-05 23:14:00,172 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-06-05 23:14:00,172 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-06-05 23:14:00,173 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-06-05 23:14:00,174 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-06-05 23:14:00,174 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-06-05 23:14:00,174 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-06-05 23:14:00,175 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-06-05 23:14:00,175 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 23:14:00,175 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 23:14:00,176 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 23:14:00,182 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 23:14:00,220 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 23:14:00,220 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 23:14:00,220 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 23:14:00,220 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 23:14:00,223 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 23:14:00,223 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 23:14:00,223 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 23:14:00,224 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 23:14:00,224 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 23:14:00,224 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 23:14:00,225 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 23:14:00,225 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 23:14:00,225 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 23:14:00,225 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 23:14:00,225 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 23:14:00,225 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 23:14:00,225 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 23:14:00,225 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 23:14:00,226 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 23:14:00,226 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 23:14:00,226 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 23:14:00,226 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 23:14:00,226 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 23:14:00,226 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 23:14:00,226 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 23:14:00,227 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 23:14:00,227 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 23:14:00,227 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 23:14:00,227 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 23:14:00,227 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 23:14:00,227 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 23:14:00,227 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 23:14:00,493 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 23:14:00,510 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 23:14:00,512 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 23:14:00,513 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 23:14:00,514 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 23:14:00,515 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/simple-queue.wvr.bpl [2021-06-05 23:14:00,515 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/simple-queue.wvr.bpl' [2021-06-05 23:14:00,580 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 23:14:00,582 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 23:14:00,583 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 23:14:00,583 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 23:14:00,583 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 23:14:00,592 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:14:00" (1/1) ... [2021-06-05 23:14:00,598 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:14:00" (1/1) ... [2021-06-05 23:14:00,603 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 23:14:00,604 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 23:14:00,604 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 23:14:00,604 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 23:14:00,611 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:14:00" (1/1) ... [2021-06-05 23:14:00,611 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:14:00" (1/1) ... [2021-06-05 23:14:00,611 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:14:00" (1/1) ... [2021-06-05 23:14:00,612 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:14:00" (1/1) ... [2021-06-05 23:14:00,614 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:14:00" (1/1) ... [2021-06-05 23:14:00,618 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:14:00" (1/1) ... [2021-06-05 23:14:00,618 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:14:00" (1/1) ... [2021-06-05 23:14:00,619 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 23:14:00,621 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 23:14:00,621 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 23:14:00,621 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 23:14:00,623 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:14:00" (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 23:14:00,701 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 23:14:00,701 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 23:14:00,702 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 23:14:00,702 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 23:14:00,702 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 23:14:00,702 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 23:14:00,702 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 23:14:00,702 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 23:14:00,702 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 23:14:00,703 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 23:14:00,859 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 23:14:00,860 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-06-05 23:14:00,860 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-06-05 23:14:00,861 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-06-05 23:14:00,862 INFO L202 PluginConnector]: Adding new model simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 11:14:00 BoogieIcfgContainer [2021-06-05 23:14:00,862 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 23:14:00,863 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 23:14:00,863 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 23:14:00,866 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 23:14:00,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:14:00" (1/2) ... [2021-06-05 23:14:00,867 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f6a2905 and model type simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 11:14:00, skipping insertion in model container [2021-06-05 23:14:00,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 11:14:00" (2/2) ... [2021-06-05 23:14:00,868 INFO L111 eAbstractionObserver]: Analyzing ICFG simple-queue.wvr.bpl [2021-06-05 23:14:00,873 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 23:14:00,873 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 23:14:00,873 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 23:14:00,874 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 23:14:00,896 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 23:14:00,914 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 23:14:00,930 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 23:14:00,931 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 23:14:00,931 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 23:14:00,931 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 23:14:00,931 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 23:14:00,931 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 23:14:00,931 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 23:14:00,931 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-05 23:14:00,939 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 46 flow [2021-06-05 23:14:00,947 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:00,948 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:00,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-06-05 23:14:00,953 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:00,953 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:14:00,954 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:00,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:00,959 INFO L82 PathProgramCache]: Analyzing trace with hash -262068682, now seen corresponding path program 1 times [2021-06-05 23:14:00,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:00,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776783603] [2021-06-05 23:14:00,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:01,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:01,106 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 23:14:01,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:01,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776783603] [2021-06-05 23:14:01,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776783603] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:14:01,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:14:01,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 23:14:01,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85392152] [2021-06-05 23:14:01,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 23:14:01,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:01,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 23:14:01,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:14:01,124 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 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 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:01,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:01,172 INFO L93 Difference]: Finished difference Result 20 states and 34 transitions. [2021-06-05 23:14:01,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 23:14:01,174 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-06-05 23:14:01,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:01,194 INFO L225 Difference]: With dead ends: 20 [2021-06-05 23:14:01,194 INFO L226 Difference]: Without dead ends: 16 [2021-06-05 23:14:01,196 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:14:01,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-06-05 23:14:01,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-06-05 23:14:01,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:01,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 27 transitions. [2021-06-05 23:14:01,223 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 27 transitions. Word has length 9 [2021-06-05 23:14:01,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:01,226 INFO L482 AbstractCegarLoop]: Abstraction has 16 states and 27 transitions. [2021-06-05 23:14:01,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:01,226 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 27 transitions. [2021-06-05 23:14:01,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 23:14:01,227 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:01,227 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:14:01,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 23:14:01,228 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:01,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:01,233 INFO L82 PathProgramCache]: Analyzing trace with hash 488876151, now seen corresponding path program 1 times [2021-06-05 23:14:01,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:01,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896026686] [2021-06-05 23:14:01,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:01,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:01,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:01,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:01,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896026686] [2021-06-05 23:14:01,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896026686] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:14:01,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:14:01,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 23:14:01,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484813774] [2021-06-05 23:14:01,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 23:14:01,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:01,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 23:14:01,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:14:01,301 INFO L87 Difference]: Start difference. First operand 16 states and 27 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:01,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:01,306 INFO L93 Difference]: Finished difference Result 21 states and 34 transitions. [2021-06-05 23:14:01,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 23:14:01,321 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-06-05 23:14:01,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:01,322 INFO L225 Difference]: With dead ends: 21 [2021-06-05 23:14:01,322 INFO L226 Difference]: Without dead ends: 18 [2021-06-05 23:14:01,322 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:14:01,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-06-05 23:14:01,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-06-05 23:14:01,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:01,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 30 transitions. [2021-06-05 23:14:01,326 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 30 transitions. Word has length 10 [2021-06-05 23:14:01,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:01,326 INFO L482 AbstractCegarLoop]: Abstraction has 18 states and 30 transitions. [2021-06-05 23:14:01,326 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:01,326 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 30 transitions. [2021-06-05 23:14:01,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 23:14:01,327 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:01,327 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:14:01,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 23:14:01,327 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:01,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:01,328 INFO L82 PathProgramCache]: Analyzing trace with hash 426152002, now seen corresponding path program 1 times [2021-06-05 23:14:01,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:01,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320153175] [2021-06-05 23:14:01,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:01,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:01,361 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 23:14:01,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:01,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320153175] [2021-06-05 23:14:01,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320153175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:01,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678789238] [2021-06-05 23:14:01,362 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 23:14:01,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:01,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:14:01,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:01,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:14:01,511 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:01,522 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:01,523 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:01,524 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 23:14:01,540 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 23:14:01,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678789238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:01,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:01,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 23:14:01,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084858771] [2021-06-05 23:14:01,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 23:14:01,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:01,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 23:14:01,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 23:14:01,544 INFO L87 Difference]: Start difference. First operand 18 states and 30 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:01,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:01,577 INFO L93 Difference]: Finished difference Result 25 states and 43 transitions. [2021-06-05 23:14:01,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 23:14:01,577 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-05 23:14:01,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:01,578 INFO L225 Difference]: With dead ends: 25 [2021-06-05 23:14:01,578 INFO L226 Difference]: Without dead ends: 21 [2021-06-05 23:14:01,579 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 23.8ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 23:14:01,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-06-05 23:14:01,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-06-05 23:14:01,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.8) internal successors, (36), 20 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 23:14:01,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 36 transitions. [2021-06-05 23:14:01,582 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 36 transitions. Word has length 11 [2021-06-05 23:14:01,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:01,583 INFO L482 AbstractCegarLoop]: Abstraction has 21 states and 36 transitions. [2021-06-05 23:14:01,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:01,583 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 36 transitions. [2021-06-05 23:14:01,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 23:14:01,583 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:01,584 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:14:01,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-05 23:14:01,793 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:01,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:01,793 INFO L82 PathProgramCache]: Analyzing trace with hash 348880875, now seen corresponding path program 2 times [2021-06-05 23:14:01,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:01,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256053692] [2021-06-05 23:14:01,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:01,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:01,836 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:01,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:01,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256053692] [2021-06-05 23:14:01,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256053692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:01,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98792800] [2021-06-05 23:14:01,837 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 23:14:01,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:14:01,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:01,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 23:14:01,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:01,905 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:01,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98792800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:01,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:01,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 4 [2021-06-05 23:14:01,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911969700] [2021-06-05 23:14:01,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 23:14:01,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:01,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 23:14:01,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 23:14:01,907 INFO L87 Difference]: Start difference. First operand 21 states and 36 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:01,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:01,918 INFO L93 Difference]: Finished difference Result 50 states and 82 transitions. [2021-06-05 23:14:01,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 23:14:01,919 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 23:14:01,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:01,920 INFO L225 Difference]: With dead ends: 50 [2021-06-05 23:14:01,921 INFO L226 Difference]: Without dead ends: 45 [2021-06-05 23:14:01,921 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.5ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 23:14:01,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-06-05 23:14:01,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 33. [2021-06-05 23:14:01,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.9375) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:01,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 62 transitions. [2021-06-05 23:14:01,927 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 62 transitions. Word has length 12 [2021-06-05 23:14:01,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:01,928 INFO L482 AbstractCegarLoop]: Abstraction has 33 states and 62 transitions. [2021-06-05 23:14:01,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:01,928 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 62 transitions. [2021-06-05 23:14:01,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 23:14:01,928 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:01,929 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:14:02,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:02,151 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:02,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:02,152 INFO L82 PathProgramCache]: Analyzing trace with hash 200515830, now seen corresponding path program 3 times [2021-06-05 23:14:02,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:02,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537379052] [2021-06-05 23:14:02,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:02,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:02,244 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 23:14:02,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:02,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537379052] [2021-06-05 23:14:02,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537379052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:02,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37103427] [2021-06-05 23:14:02,245 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 23:14:02,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 23:14:02,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:02,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 23:14:02,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:02,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:14:02,365 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:02,366 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:02,367 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:02,367 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 23:14:02,375 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 23:14:02,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37103427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:02,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:02,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 23:14:02,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408024574] [2021-06-05 23:14:02,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 23:14:02,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:02,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 23:14:02,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 23:14:02,377 INFO L87 Difference]: Start difference. First operand 33 states and 62 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:02,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:02,431 INFO L93 Difference]: Finished difference Result 65 states and 115 transitions. [2021-06-05 23:14:02,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 23:14:02,431 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 23:14:02,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:02,432 INFO L225 Difference]: With dead ends: 65 [2021-06-05 23:14:02,432 INFO L226 Difference]: Without dead ends: 39 [2021-06-05 23:14:02,433 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 71.7ms TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:14:02,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-06-05 23:14:02,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2021-06-05 23:14:02,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.84) internal successors, (46), 25 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 23:14:02,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 46 transitions. [2021-06-05 23:14:02,437 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 46 transitions. Word has length 13 [2021-06-05 23:14:02,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:02,437 INFO L482 AbstractCegarLoop]: Abstraction has 26 states and 46 transitions. [2021-06-05 23:14:02,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:02,438 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 46 transitions. [2021-06-05 23:14:02,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 23:14:02,438 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:02,438 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:14:02,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:02,660 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:02,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:02,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1944094135, now seen corresponding path program 4 times [2021-06-05 23:14:02,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:02,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008858715] [2021-06-05 23:14:02,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:02,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:02,714 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:02,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:02,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008858715] [2021-06-05 23:14:02,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008858715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:02,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623018582] [2021-06-05 23:14:02,714 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 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 23:14:02,749 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:14:02,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:02,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 23:14:02,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:02,806 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:02,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623018582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:02,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:02,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 23:14:02,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310753872] [2021-06-05 23:14:02,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 23:14:02,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:02,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 23:14:02,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-05 23:14:02,808 INFO L87 Difference]: Start difference. First operand 26 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:02,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:02,824 INFO L93 Difference]: Finished difference Result 73 states and 125 transitions. [2021-06-05 23:14:02,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 23:14:02,825 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 23:14:02,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:02,828 INFO L225 Difference]: With dead ends: 73 [2021-06-05 23:14:02,828 INFO L226 Difference]: Without dead ends: 66 [2021-06-05 23:14:02,829 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 14.5ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-05 23:14:02,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-06-05 23:14:02,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 48. [2021-06-05 23:14:02,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:02,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 95 transitions. [2021-06-05 23:14:02,847 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 95 transitions. Word has length 14 [2021-06-05 23:14:02,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:02,847 INFO L482 AbstractCegarLoop]: Abstraction has 48 states and 95 transitions. [2021-06-05 23:14:02,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:02,847 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 95 transitions. [2021-06-05 23:14:02,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 23:14:02,848 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:02,848 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:14:03,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:03,065 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:03,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:03,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1099206658, now seen corresponding path program 5 times [2021-06-05 23:14:03,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:03,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236414239] [2021-06-05 23:14:03,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:03,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:03,150 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:03,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:03,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236414239] [2021-06-05 23:14:03,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236414239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:03,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992267293] [2021-06-05 23:14:03,151 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 23:14:03,244 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:14:03,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:03,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 23:14:03,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:03,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:14:03,548 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 11 treesize of output 7 [2021-06-05 23:14:03,550 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:03,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:03,559 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:03,560 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2021-06-05 23:14:03,569 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:03,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992267293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:03,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:03,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 23:14:03,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486109021] [2021-06-05 23:14:03,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 23:14:03,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:03,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 23:14:03,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 23:14:03,572 INFO L87 Difference]: Start difference. First operand 48 states and 95 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:04,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:04,002 INFO L93 Difference]: Finished difference Result 229 states and 428 transitions. [2021-06-05 23:14:04,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 23:14:04,003 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 23:14:04,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:04,004 INFO L225 Difference]: With dead ends: 229 [2021-06-05 23:14:04,004 INFO L226 Difference]: Without dead ends: 116 [2021-06-05 23:14:04,004 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 459.8ms TimeCoverageRelationStatistics Valid=207, Invalid=723, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:14:04,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-06-05 23:14:04,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 56. [2021-06-05 23:14:04,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.0545454545454547) internal successors, (113), 55 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:04,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 113 transitions. [2021-06-05 23:14:04,009 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 113 transitions. Word has length 15 [2021-06-05 23:14:04,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:04,009 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 113 transitions. [2021-06-05 23:14:04,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:04,009 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 113 transitions. [2021-06-05 23:14:04,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 23:14:04,010 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:04,010 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:14:04,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-06-05 23:14:04,234 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:04,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:04,234 INFO L82 PathProgramCache]: Analyzing trace with hash -449307722, now seen corresponding path program 6 times [2021-06-05 23:14:04,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:04,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406783166] [2021-06-05 23:14:04,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:04,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:04,351 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:04,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:04,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406783166] [2021-06-05 23:14:04,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406783166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:04,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14469366] [2021-06-05 23:14:04,356 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 23:14:04,389 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:14:04,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:04,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:14:04,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:04,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:14:04,457 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:04,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:04,459 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:04,459 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 23:14:04,466 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:04,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14469366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:04,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:04,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 23:14:04,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668327573] [2021-06-05 23:14:04,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 23:14:04,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:04,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 23:14:04,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:14:04,470 INFO L87 Difference]: Start difference. First operand 56 states and 113 transitions. Second operand has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:04,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:04,637 INFO L93 Difference]: Finished difference Result 121 states and 226 transitions. [2021-06-05 23:14:04,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 23:14:04,638 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 23:14:04,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:04,638 INFO L225 Difference]: With dead ends: 121 [2021-06-05 23:14:04,638 INFO L226 Difference]: Without dead ends: 77 [2021-06-05 23:14:04,639 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 193.9ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:14:04,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-06-05 23:14:04,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 36. [2021-06-05 23:14:04,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 35 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:04,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 66 transitions. [2021-06-05 23:14:04,651 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 66 transitions. Word has length 17 [2021-06-05 23:14:04,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:04,651 INFO L482 AbstractCegarLoop]: Abstraction has 36 states and 66 transitions. [2021-06-05 23:14:04,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:04,651 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 66 transitions. [2021-06-05 23:14:04,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 23:14:04,655 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:04,655 INFO L554 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:14:04,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:04,856 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:04,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:04,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1020566793, now seen corresponding path program 7 times [2021-06-05 23:14:04,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:04,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946344016] [2021-06-05 23:14:04,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:04,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:04,917 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:04,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:04,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946344016] [2021-06-05 23:14:04,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946344016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:04,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813309031] [2021-06-05 23:14:04,917 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 23:14:04,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:04,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 23:14:04,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:05,032 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:05,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813309031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:05,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:05,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 23:14:05,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692737317] [2021-06-05 23:14:05,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 23:14:05,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:05,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 23:14:05,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-06-05 23:14:05,034 INFO L87 Difference]: Start difference. First operand 36 states and 66 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:05,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:05,052 INFO L93 Difference]: Finished difference Result 128 states and 229 transitions. [2021-06-05 23:14:05,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 23:14:05,053 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have 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 23:14:05,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:05,053 INFO L225 Difference]: With dead ends: 128 [2021-06-05 23:14:05,053 INFO L226 Difference]: Without dead ends: 117 [2021-06-05 23:14:05,054 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 22.9ms TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-06-05 23:14:05,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-06-05 23:14:05,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 87. [2021-06-05 23:14:05,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.0813953488372094) internal successors, (179), 86 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:05,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 179 transitions. [2021-06-05 23:14:05,057 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 179 transitions. Word has length 18 [2021-06-05 23:14:05,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:05,058 INFO L482 AbstractCegarLoop]: Abstraction has 87 states and 179 transitions. [2021-06-05 23:14:05,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:05,058 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 179 transitions. [2021-06-05 23:14:05,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 23:14:05,058 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:05,059 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:14:05,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:05,273 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:05,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:05,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1344581694, now seen corresponding path program 8 times [2021-06-05 23:14:05,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:05,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498717474] [2021-06-05 23:14:05,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:05,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:05,402 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:05,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:05,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498717474] [2021-06-05 23:14:05,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498717474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:05,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816381099] [2021-06-05 23:14:05,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:14:05,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:14:05,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:05,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 23:14:05,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:05,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:14:05,484 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:05,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:05,486 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:05,486 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 23:14:05,492 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:05,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816381099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:05,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:05,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 23:14:05,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037217771] [2021-06-05 23:14:05,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 23:14:05,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:05,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 23:14:05,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:14:05,494 INFO L87 Difference]: Start difference. First operand 87 states and 179 transitions. Second operand has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:05,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:05,696 INFO L93 Difference]: Finished difference Result 179 states and 337 transitions. [2021-06-05 23:14:05,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 23:14:05,696 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 23:14:05,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:05,697 INFO L225 Difference]: With dead ends: 179 [2021-06-05 23:14:05,697 INFO L226 Difference]: Without dead ends: 105 [2021-06-05 23:14:05,697 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 223.6ms TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:14:05,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-06-05 23:14:05,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 41. [2021-06-05 23:14:05,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.9) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:05,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 76 transitions. [2021-06-05 23:14:05,700 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 76 transitions. Word has length 19 [2021-06-05 23:14:05,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:05,700 INFO L482 AbstractCegarLoop]: Abstraction has 41 states and 76 transitions. [2021-06-05 23:14:05,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:05,700 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 76 transitions. [2021-06-05 23:14:05,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 23:14:05,706 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:05,706 INFO L554 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:14:05,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 23:14:05,923 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:05,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:05,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1290711147, now seen corresponding path program 9 times [2021-06-05 23:14:05,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:05,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588527995] [2021-06-05 23:14:05,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:05,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:05,976 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:05,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:05,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588527995] [2021-06-05 23:14:05,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588527995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:05,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377086895] [2021-06-05 23:14:05,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:06,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:14:06,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:06,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 23:14:06,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:06,092 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:06,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377086895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:06,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:06,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 23:14:06,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825215107] [2021-06-05 23:14:06,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 23:14:06,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:06,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 23:14:06,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-06-05 23:14:06,094 INFO L87 Difference]: Start difference. First operand 41 states and 76 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:06,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:06,114 INFO L93 Difference]: Finished difference Result 160 states and 290 transitions. [2021-06-05 23:14:06,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 23:14:06,115 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 23:14:06,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:06,117 INFO L225 Difference]: With dead ends: 160 [2021-06-05 23:14:06,117 INFO L226 Difference]: Without dead ends: 147 [2021-06-05 23:14:06,117 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 29.4ms TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-06-05 23:14:06,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-06-05 23:14:06,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 111. [2021-06-05 23:14:06,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.090909090909091) internal successors, (230), 110 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:06,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 230 transitions. [2021-06-05 23:14:06,128 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 230 transitions. Word has length 20 [2021-06-05 23:14:06,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:06,129 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 230 transitions. [2021-06-05 23:14:06,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:06,129 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 230 transitions. [2021-06-05 23:14:06,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 23:14:06,129 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:06,130 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:14:06,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:06,345 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:06,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:06,345 INFO L82 PathProgramCache]: Analyzing trace with hash -849963402, now seen corresponding path program 10 times [2021-06-05 23:14:06,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:06,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746532166] [2021-06-05 23:14:06,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:06,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:06,505 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:06,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:06,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746532166] [2021-06-05 23:14:06,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746532166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:06,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487589716] [2021-06-05 23:14:06,506 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:06,546 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:14:06,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:06,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:14:06,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:06,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:14:06,610 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:06,611 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:06,611 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:06,612 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 23:14:06,619 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:06,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487589716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:06,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:06,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 23:14:06,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036896359] [2021-06-05 23:14:06,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 23:14:06,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:06,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 23:14:06,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-06-05 23:14:06,621 INFO L87 Difference]: Start difference. First operand 111 states and 230 transitions. Second operand has 15 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:06,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:06,900 INFO L93 Difference]: Finished difference Result 229 states and 435 transitions. [2021-06-05 23:14:06,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 23:14:06,900 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 23:14:06,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:06,901 INFO L225 Difference]: With dead ends: 229 [2021-06-05 23:14:06,901 INFO L226 Difference]: Without dead ends: 135 [2021-06-05 23:14:06,902 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 323.4ms TimeCoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:14:06,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-06-05 23:14:06,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 46. [2021-06-05 23:14:06,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.9111111111111112) internal successors, (86), 45 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:06,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 86 transitions. [2021-06-05 23:14:06,904 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 86 transitions. Word has length 21 [2021-06-05 23:14:06,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:06,904 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 86 transitions. [2021-06-05 23:14:06,904 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:06,904 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 86 transitions. [2021-06-05 23:14:06,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 23:14:06,905 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:06,905 INFO L554 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:14:07,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:07,121 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:07,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:07,121 INFO L82 PathProgramCache]: Analyzing trace with hash -555990985, now seen corresponding path program 11 times [2021-06-05 23:14:07,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:07,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844978032] [2021-06-05 23:14:07,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:07,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:07,204 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:07,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:07,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844978032] [2021-06-05 23:14:07,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844978032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:07,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131456714] [2021-06-05 23:14:07,204 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:07,252 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 23:14:07,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:07,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 23:14:07,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:07,314 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:07,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131456714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:07,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:07,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 23:14:07,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193811903] [2021-06-05 23:14:07,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 23:14:07,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:07,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 23:14:07,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-06-05 23:14:07,316 INFO L87 Difference]: Start difference. First operand 46 states and 86 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:07,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:07,337 INFO L93 Difference]: Finished difference Result 195 states and 357 transitions. [2021-06-05 23:14:07,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 23:14:07,337 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 23:14:07,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:07,338 INFO L225 Difference]: With dead ends: 195 [2021-06-05 23:14:07,338 INFO L226 Difference]: Without dead ends: 180 [2021-06-05 23:14:07,338 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 52.6ms TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-06-05 23:14:07,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-06-05 23:14:07,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 138. [2021-06-05 23:14:07,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.0948905109489053) internal successors, (287), 137 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:07,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 287 transitions. [2021-06-05 23:14:07,345 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 287 transitions. Word has length 22 [2021-06-05 23:14:07,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:07,345 INFO L482 AbstractCegarLoop]: Abstraction has 138 states and 287 transitions. [2021-06-05 23:14:07,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:07,345 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 287 transitions. [2021-06-05 23:14:07,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 23:14:07,346 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:07,346 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:14:07,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-06-05 23:14:07,569 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:07,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:07,569 INFO L82 PathProgramCache]: Analyzing trace with hash -454897790, now seen corresponding path program 12 times [2021-06-05 23:14:07,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:07,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397690693] [2021-06-05 23:14:07,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:07,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:07,757 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:07,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:07,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397690693] [2021-06-05 23:14:07,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397690693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:07,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37233117] [2021-06-05 23:14:07,758 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:07,785 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 23:14:07,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:07,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:14:07,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:08,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:14:08,292 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 11 treesize of output 7 [2021-06-05 23:14:08,293 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:08,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:08,299 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:08,299 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2021-06-05 23:14:08,305 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 21 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:08,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37233117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:08,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:08,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 23:14:08,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661195431] [2021-06-05 23:14:08,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:14:08,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:08,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:14:08,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:14:08,306 INFO L87 Difference]: Start difference. First operand 138 states and 287 transitions. Second operand has 31 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 30 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 23:14:10,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:10,026 INFO L93 Difference]: Finished difference Result 869 states and 1674 transitions. [2021-06-05 23:14:10,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 23:14:10,027 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 30 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 23:14:10,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:10,029 INFO L225 Difference]: With dead ends: 869 [2021-06-05 23:14:10,029 INFO L226 Difference]: Without dead ends: 472 [2021-06-05 23:14:10,031 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1485 ImplicationChecksByTransitivity, 1846.0ms TimeCoverageRelationStatistics Valid=1224, Invalid=5256, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 23:14:10,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-06-05 23:14:10,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 150. [2021-06-05 23:14:10,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.1006711409395975) internal successors, (313), 149 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:10,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 313 transitions. [2021-06-05 23:14:10,037 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 313 transitions. Word has length 23 [2021-06-05 23:14:10,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:10,037 INFO L482 AbstractCegarLoop]: Abstraction has 150 states and 313 transitions. [2021-06-05 23:14:10,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 30 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 23:14:10,037 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 313 transitions. [2021-06-05 23:14:10,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:14:10,038 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:10,038 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:14:10,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 23:14:10,260 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:10,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:10,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1467420982, now seen corresponding path program 13 times [2021-06-05 23:14:10,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:10,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197819562] [2021-06-05 23:14:10,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:10,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:10,483 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:10,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:10,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197819562] [2021-06-05 23:14:10,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197819562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:10,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595594577] [2021-06-05 23:14:10,483 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:10,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:10,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 23:14:10,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:10,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:14:10,590 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:10,591 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:10,591 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:10,591 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 23:14:10,598 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:10,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595594577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:10,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:10,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-05 23:14:10,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623022237] [2021-06-05 23:14:10,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 23:14:10,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:10,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 23:14:10,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:14:10,599 INFO L87 Difference]: Start difference. First operand 150 states and 313 transitions. Second operand has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:11,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:11,033 INFO L93 Difference]: Finished difference Result 325 states and 626 transitions. [2021-06-05 23:14:11,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 23:14:11,034 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 23:14:11,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:11,035 INFO L225 Difference]: With dead ends: 325 [2021-06-05 23:14:11,035 INFO L226 Difference]: Without dead ends: 205 [2021-06-05 23:14:11,035 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 471.0ms TimeCoverageRelationStatistics Valid=211, Invalid=979, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:14:11,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-06-05 23:14:11,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 56. [2021-06-05 23:14:11,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.9272727272727272) internal successors, (106), 55 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:11,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 106 transitions. [2021-06-05 23:14:11,038 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 106 transitions. Word has length 25 [2021-06-05 23:14:11,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:11,038 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 106 transitions. [2021-06-05 23:14:11,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:11,038 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 106 transitions. [2021-06-05 23:14:11,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:14:11,038 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:11,039 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:14:11,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 23:14:11,256 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:11,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:11,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1731519113, now seen corresponding path program 14 times [2021-06-05 23:14:11,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:11,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145794043] [2021-06-05 23:14:11,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:11,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:11,351 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:11,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:11,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145794043] [2021-06-05 23:14:11,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145794043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:11,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413662960] [2021-06-05 23:14:11,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:11,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:14:11,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:11,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 23:14:11,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:11,449 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:11,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413662960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:11,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:11,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 23:14:11,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72857006] [2021-06-05 23:14:11,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 23:14:11,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:11,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 23:14:11,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:14:11,451 INFO L87 Difference]: Start difference. First operand 56 states and 106 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:11,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:11,473 INFO L93 Difference]: Finished difference Result 274 states and 509 transitions. [2021-06-05 23:14:11,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 23:14:11,474 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:14:11,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:11,474 INFO L225 Difference]: With dead ends: 274 [2021-06-05 23:14:11,475 INFO L226 Difference]: Without dead ends: 255 [2021-06-05 23:14:11,475 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 50.5ms TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:14:11,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-06-05 23:14:11,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 201. [2021-06-05 23:14:11,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.095) internal successors, (419), 200 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 23:14:11,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 419 transitions. [2021-06-05 23:14:11,479 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 419 transitions. Word has length 26 [2021-06-05 23:14:11,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:11,479 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 419 transitions. [2021-06-05 23:14:11,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:11,479 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 419 transitions. [2021-06-05 23:14:11,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:14:11,480 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:11,480 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:14:11,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:11,697 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:11,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:11,697 INFO L82 PathProgramCache]: Analyzing trace with hash 252907330, now seen corresponding path program 15 times [2021-06-05 23:14:11,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:11,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563594927] [2021-06-05 23:14:11,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:11,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:11,933 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:11,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:11,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563594927] [2021-06-05 23:14:11,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563594927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:11,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055612302] [2021-06-05 23:14:11,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:11,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 23:14:11,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:11,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 23:14:11,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:12,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:14:12,036 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:12,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:12,037 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:12,037 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 23:14:12,043 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:12,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055612302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:12,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:12,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2021-06-05 23:14:12,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132451753] [2021-06-05 23:14:12,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 23:14:12,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:12,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 23:14:12,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:14:12,045 INFO L87 Difference]: Start difference. First operand 201 states and 419 transitions. Second operand has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:12,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:12,565 INFO L93 Difference]: Finished difference Result 415 states and 801 transitions. [2021-06-05 23:14:12,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 23:14:12,565 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:14:12,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:12,568 INFO L225 Difference]: With dead ends: 415 [2021-06-05 23:14:12,568 INFO L226 Difference]: Without dead ends: 249 [2021-06-05 23:14:12,569 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 559.0ms TimeCoverageRelationStatistics Valid=255, Invalid=1227, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:14:12,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-06-05 23:14:12,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 61. [2021-06-05 23:14:12,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.9333333333333333) internal successors, (116), 60 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:12,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 116 transitions. [2021-06-05 23:14:12,572 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 116 transitions. Word has length 27 [2021-06-05 23:14:12,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:12,572 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 116 transitions. [2021-06-05 23:14:12,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:12,572 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 116 transitions. [2021-06-05 23:14:12,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 23:14:12,572 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:12,572 INFO L554 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:14:12,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 23:14:12,795 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:12,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:12,796 INFO L82 PathProgramCache]: Analyzing trace with hash -726736661, now seen corresponding path program 16 times [2021-06-05 23:14:12,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:12,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953946692] [2021-06-05 23:14:12,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:12,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:12,890 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:12,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:12,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953946692] [2021-06-05 23:14:12,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953946692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:12,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295018922] [2021-06-05 23:14:12,891 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:12,923 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:14:12,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:12,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:14:12,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:12,987 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:12,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295018922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:12,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:12,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 23:14:12,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063294372] [2021-06-05 23:14:12,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 23:14:12,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:12,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 23:14:12,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:14:12,989 INFO L87 Difference]: Start difference. First operand 61 states and 116 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 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 23:14:13,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:13,014 INFO L93 Difference]: Finished difference Result 318 states and 594 transitions. [2021-06-05 23:14:13,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 23:14:13,017 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 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 28 [2021-06-05 23:14:13,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:13,020 INFO L225 Difference]: With dead ends: 318 [2021-06-05 23:14:13,020 INFO L226 Difference]: Without dead ends: 297 [2021-06-05 23:14:13,020 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 61.4ms TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:14:13,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-06-05 23:14:13,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 237. [2021-06-05 23:14:13,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 2.093220338983051) internal successors, (494), 236 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:13,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 494 transitions. [2021-06-05 23:14:13,028 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 494 transitions. Word has length 28 [2021-06-05 23:14:13,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:13,029 INFO L482 AbstractCegarLoop]: Abstraction has 237 states and 494 transitions. [2021-06-05 23:14:13,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 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 23:14:13,029 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 494 transitions. [2021-06-05 23:14:13,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 23:14:13,029 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:13,029 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:14:13,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 23:14:13,249 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:13,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:13,249 INFO L82 PathProgramCache]: Analyzing trace with hash -658404362, now seen corresponding path program 17 times [2021-06-05 23:14:13,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:13,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288819415] [2021-06-05 23:14:13,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:13,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:13,545 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:13,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:13,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288819415] [2021-06-05 23:14:13,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288819415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:13,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415788045] [2021-06-05 23:14:13,546 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:13,575 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 23:14:13,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:13,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:14:13,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:14,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:14:14,377 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 11 treesize of output 7 [2021-06-05 23:14:14,379 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:14,384 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:14,385 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:14,385 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2021-06-05 23:14:14,392 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 45 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:14,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415788045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:14,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:14,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-06-05 23:14:14,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575545166] [2021-06-05 23:14:14,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 23:14:14,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:14,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 23:14:14,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=1533, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:14:14,394 INFO L87 Difference]: Start difference. First operand 237 states and 494 transitions. Second operand has 43 states, 43 states have (on average 1.2325581395348837) internal successors, (53), 42 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:18,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:18,286 INFO L93 Difference]: Finished difference Result 1727 states and 3354 transitions. [2021-06-05 23:14:18,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-06-05 23:14:18,287 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.2325581395348837) internal successors, (53), 42 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 23:14:18,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:18,290 INFO L225 Difference]: With dead ends: 1727 [2021-06-05 23:14:18,291 INFO L226 Difference]: Without dead ends: 1012 [2021-06-05 23:14:18,294 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4325 ImplicationChecksByTransitivity, 4027.3ms TimeCoverageRelationStatistics Valid=2986, Invalid=13526, Unknown=0, NotChecked=0, Total=16512 [2021-06-05 23:14:18,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1012 states. [2021-06-05 23:14:18,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1012 to 252. [2021-06-05 23:14:18,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.095617529880478) internal successors, (526), 251 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:18,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 526 transitions. [2021-06-05 23:14:18,304 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 526 transitions. Word has length 29 [2021-06-05 23:14:18,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:18,304 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 526 transitions. [2021-06-05 23:14:18,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.2325581395348837) internal successors, (53), 42 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:18,304 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 526 transitions. [2021-06-05 23:14:18,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 23:14:18,305 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:18,305 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:14:18,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:18,525 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:18,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:18,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1964765438, now seen corresponding path program 18 times [2021-06-05 23:14:18,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:18,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586479294] [2021-06-05 23:14:18,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:18,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:18,828 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:18,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:18,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586479294] [2021-06-05 23:14:18,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586479294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:18,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137172522] [2021-06-05 23:14:18,828 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:18,873 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 23:14:18,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:18,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 23:14:18,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:18,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:14:18,949 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:18,951 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:18,951 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:18,951 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 23:14:18,957 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:18,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137172522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:18,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:18,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-05 23:14:18,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712295979] [2021-06-05 23:14:18,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:14:18,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:18,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:14:18,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:14:18,960 INFO L87 Difference]: Start difference. First operand 252 states and 526 transitions. Second operand has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 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 23:14:19,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:19,765 INFO L93 Difference]: Finished difference Result 541 states and 1052 transitions. [2021-06-05 23:14:19,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 23:14:19,773 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 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 31 [2021-06-05 23:14:19,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:19,774 INFO L225 Difference]: With dead ends: 541 [2021-06-05 23:14:19,774 INFO L226 Difference]: Without dead ends: 343 [2021-06-05 23:14:19,775 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 824.9ms TimeCoverageRelationStatistics Valid=355, Invalid=1807, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:14:19,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-06-05 23:14:19,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 71. [2021-06-05 23:14:19,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.9428571428571428) internal successors, (136), 70 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:19,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 136 transitions. [2021-06-05 23:14:19,778 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 136 transitions. Word has length 31 [2021-06-05 23:14:19,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:19,779 INFO L482 AbstractCegarLoop]: Abstraction has 71 states and 136 transitions. [2021-06-05 23:14:19,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 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 23:14:19,779 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 136 transitions. [2021-06-05 23:14:19,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 23:14:19,779 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:19,779 INFO L554 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:14:20,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:20,002 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:20,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:20,002 INFO L82 PathProgramCache]: Analyzing trace with hash -755115733, now seen corresponding path program 19 times [2021-06-05 23:14:20,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:20,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073030521] [2021-06-05 23:14:20,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:20,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:20,125 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:20,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:20,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073030521] [2021-06-05 23:14:20,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073030521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:20,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603818282] [2021-06-05 23:14:20,125 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:20,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:20,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:14:20,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:20,257 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:20,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603818282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:20,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:20,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 23:14:20,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047972951] [2021-06-05 23:14:20,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 23:14:20,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:20,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 23:14:20,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-06-05 23:14:20,260 INFO L87 Difference]: Start difference. First operand 71 states and 136 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 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 23:14:20,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:20,293 INFO L93 Difference]: Finished difference Result 415 states and 782 transitions. [2021-06-05 23:14:20,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 23:14:20,294 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 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 32 [2021-06-05 23:14:20,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:20,295 INFO L225 Difference]: With dead ends: 415 [2021-06-05 23:14:20,295 INFO L226 Difference]: Without dead ends: 390 [2021-06-05 23:14:20,295 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 80.8ms TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-06-05 23:14:20,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-06-05 23:14:20,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 318. [2021-06-05 23:14:20,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.088328075709779) internal successors, (662), 317 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:20,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 662 transitions. [2021-06-05 23:14:20,303 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 662 transitions. Word has length 32 [2021-06-05 23:14:20,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:20,303 INFO L482 AbstractCegarLoop]: Abstraction has 318 states and 662 transitions. [2021-06-05 23:14:20,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 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 23:14:20,303 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 662 transitions. [2021-06-05 23:14:20,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 23:14:20,305 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:20,305 INFO L554 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:14:20,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:20,517 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:20,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:20,517 INFO L82 PathProgramCache]: Analyzing trace with hash -396491082, now seen corresponding path program 20 times [2021-06-05 23:14:20,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:20,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451312688] [2021-06-05 23:14:20,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:20,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:20,881 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:20,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:20,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451312688] [2021-06-05 23:14:20,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451312688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:20,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450059500] [2021-06-05 23:14:20,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:20,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:14:20,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:20,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 23:14:20,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:20,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:14:20,998 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:20,999 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:21,000 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:21,000 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 23:14:21,006 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:21,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450059500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:21,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:21,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2021-06-05 23:14:21,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426937431] [2021-06-05 23:14:21,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:14:21,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:21,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:14:21,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:14:21,007 INFO L87 Difference]: Start difference. First operand 318 states and 662 transitions. Second operand has 27 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 26 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 23:14:21,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:21,870 INFO L93 Difference]: Finished difference Result 655 states and 1275 transitions. [2021-06-05 23:14:21,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 23:14:21,870 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 26 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 33 [2021-06-05 23:14:21,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:21,872 INFO L225 Difference]: With dead ends: 655 [2021-06-05 23:14:21,872 INFO L226 Difference]: Without dead ends: 399 [2021-06-05 23:14:21,872 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 918.0ms TimeCoverageRelationStatistics Valid=411, Invalid=2139, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 23:14:21,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-06-05 23:14:21,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 76. [2021-06-05 23:14:21,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.9466666666666668) internal successors, (146), 75 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:21,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 146 transitions. [2021-06-05 23:14:21,877 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 146 transitions. Word has length 33 [2021-06-05 23:14:21,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:21,877 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 146 transitions. [2021-06-05 23:14:21,877 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 26 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 23:14:21,877 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 146 transitions. [2021-06-05 23:14:21,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 23:14:21,877 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:21,877 INFO L554 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:14:22,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-05 23:14:22,091 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:22,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:22,092 INFO L82 PathProgramCache]: Analyzing trace with hash 616749047, now seen corresponding path program 21 times [2021-06-05 23:14:22,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:22,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638802814] [2021-06-05 23:14:22,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:22,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:22,212 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:22,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:22,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638802814] [2021-06-05 23:14:22,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638802814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:22,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356731517] [2021-06-05 23:14:22,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:22,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 23:14:22,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:22,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:14:22,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:22,328 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:22,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356731517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:22,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:22,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 23:14:22,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008983771] [2021-06-05 23:14:22,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 23:14:22,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:22,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 23:14:22,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-06-05 23:14:22,330 INFO L87 Difference]: Start difference. First operand 76 states and 146 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:22,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:22,370 INFO L93 Difference]: Finished difference Result 468 states and 885 transitions. [2021-06-05 23:14:22,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 23:14:22,370 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 23:14:22,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:22,372 INFO L225 Difference]: With dead ends: 468 [2021-06-05 23:14:22,372 INFO L226 Difference]: Without dead ends: 441 [2021-06-05 23:14:22,372 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 92.2ms TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-06-05 23:14:22,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-06-05 23:14:22,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 363. [2021-06-05 23:14:22,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 362 states have (on average 2.085635359116022) internal successors, (755), 362 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:22,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 755 transitions. [2021-06-05 23:14:22,379 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 755 transitions. Word has length 34 [2021-06-05 23:14:22,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:22,379 INFO L482 AbstractCegarLoop]: Abstraction has 363 states and 755 transitions. [2021-06-05 23:14:22,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:22,380 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 755 transitions. [2021-06-05 23:14:22,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 23:14:22,380 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:22,380 INFO L554 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:14:22,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 23:14:22,601 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:22,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:22,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1657654978, now seen corresponding path program 22 times [2021-06-05 23:14:22,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:22,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785077069] [2021-06-05 23:14:22,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:22,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:22,992 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:22,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:22,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785077069] [2021-06-05 23:14:22,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785077069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:22,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027394572] [2021-06-05 23:14:22,992 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:23,023 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:14:23,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:23,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 55 conjunts are in the unsatisfiable core [2021-06-05 23:14:23,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:23,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:14:23,107 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:23,108 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:23,109 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:23,109 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 23:14:23,114 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:23,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027394572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:23,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:23,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2021-06-05 23:14:23,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353978049] [2021-06-05 23:14:23,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:14:23,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:23,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:14:23,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:14:23,116 INFO L87 Difference]: Start difference. First operand 363 states and 755 transitions. Second operand has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 28 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 23:14:24,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:24,063 INFO L93 Difference]: Finished difference Result 747 states and 1457 transitions. [2021-06-05 23:14:24,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 23:14:24,063 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 28 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 35 [2021-06-05 23:14:24,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:24,065 INFO L225 Difference]: With dead ends: 747 [2021-06-05 23:14:24,065 INFO L226 Difference]: Without dead ends: 457 [2021-06-05 23:14:24,066 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 1031.1ms TimeCoverageRelationStatistics Valid=471, Invalid=2499, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 23:14:24,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-06-05 23:14:24,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 81. [2021-06-05 23:14:24,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.95) internal successors, (156), 80 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:24,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 156 transitions. [2021-06-05 23:14:24,069 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 156 transitions. Word has length 35 [2021-06-05 23:14:24,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:24,070 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 156 transitions. [2021-06-05 23:14:24,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 28 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 23:14:24,070 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 156 transitions. [2021-06-05 23:14:24,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 23:14:24,070 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:24,070 INFO L554 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:14:24,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:24,293 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:24,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:24,293 INFO L82 PathProgramCache]: Analyzing trace with hash -129232533, now seen corresponding path program 23 times [2021-06-05 23:14:24,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:24,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878895385] [2021-06-05 23:14:24,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:24,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:24,430 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:24,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:24,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878895385] [2021-06-05 23:14:24,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878895385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:24,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214778528] [2021-06-05 23:14:24,431 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:24,483 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 23:14:24,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:24,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 23:14:24,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:24,560 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:24,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214778528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:24,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:24,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 23:14:24,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649954203] [2021-06-05 23:14:24,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 23:14:24,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:24,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 23:14:24,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:14:24,562 INFO L87 Difference]: Start difference. First operand 81 states and 156 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 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 23:14:24,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:24,602 INFO L93 Difference]: Finished difference Result 524 states and 994 transitions. [2021-06-05 23:14:24,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 23:14:24,602 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 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 36 [2021-06-05 23:14:24,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:24,604 INFO L225 Difference]: With dead ends: 524 [2021-06-05 23:14:24,604 INFO L226 Difference]: Without dead ends: 495 [2021-06-05 23:14:24,604 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 107.6ms TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:14:24,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-06-05 23:14:24,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 411. [2021-06-05 23:14:24,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.0829268292682928) internal successors, (854), 410 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:24,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 854 transitions. [2021-06-05 23:14:24,620 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 854 transitions. Word has length 36 [2021-06-05 23:14:24,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:24,620 INFO L482 AbstractCegarLoop]: Abstraction has 411 states and 854 transitions. [2021-06-05 23:14:24,620 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 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 23:14:24,620 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 854 transitions. [2021-06-05 23:14:24,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 23:14:24,621 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:24,621 INFO L554 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:14:24,845 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 23:14:24,845 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:24,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:24,845 INFO L82 PathProgramCache]: Analyzing trace with hash -546012810, now seen corresponding path program 24 times [2021-06-05 23:14:24,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:24,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842715986] [2021-06-05 23:14:24,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:24,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:25,350 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:25,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:25,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842715986] [2021-06-05 23:14:25,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842715986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:25,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13169401] [2021-06-05 23:14:25,351 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:25,389 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 23:14:25,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:25,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 59 conjunts are in the unsatisfiable core [2021-06-05 23:14:25,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:25,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:14:25,468 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:25,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:25,470 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:25,470 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 23:14:25,475 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:25,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13169401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:25,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:25,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-06-05 23:14:25,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613232949] [2021-06-05 23:14:25,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:14:25,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:25,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:14:25,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:14:25,476 INFO L87 Difference]: Start difference. First operand 411 states and 854 transitions. Second operand has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 30 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 23:14:26,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:26,679 INFO L93 Difference]: Finished difference Result 845 states and 1651 transitions. [2021-06-05 23:14:26,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 23:14:26,679 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 30 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 37 [2021-06-05 23:14:26,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:26,681 INFO L225 Difference]: With dead ends: 845 [2021-06-05 23:14:26,681 INFO L226 Difference]: Without dead ends: 519 [2021-06-05 23:14:26,682 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 1340.1ms TimeCoverageRelationStatistics Valid=535, Invalid=2887, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 23:14:26,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-06-05 23:14:26,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 86. [2021-06-05 23:14:26,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.9529411764705882) internal successors, (166), 85 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:26,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 166 transitions. [2021-06-05 23:14:26,686 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 166 transitions. Word has length 37 [2021-06-05 23:14:26,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:26,686 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 166 transitions. [2021-06-05 23:14:26,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 30 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 23:14:26,686 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 166 transitions. [2021-06-05 23:14:26,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 23:14:26,687 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:26,687 INFO L554 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:14:26,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:26,901 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:26,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:26,901 INFO L82 PathProgramCache]: Analyzing trace with hash 276542775, now seen corresponding path program 25 times [2021-06-05 23:14:26,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:26,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075972682] [2021-06-05 23:14:26,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:26,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:27,050 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:27,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:27,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075972682] [2021-06-05 23:14:27,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075972682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:27,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272425429] [2021-06-05 23:14:27,051 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:14:27,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:27,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 23:14:27,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:27,191 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:27,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272425429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:27,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:27,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-06-05 23:14:27,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293068084] [2021-06-05 23:14:27,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:14:27,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:27,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:14:27,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:14:27,192 INFO L87 Difference]: Start difference. First operand 86 states and 166 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:27,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:27,237 INFO L93 Difference]: Finished difference Result 583 states and 1109 transitions. [2021-06-05 23:14:27,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 23:14:27,238 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 23:14:27,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:27,239 INFO L225 Difference]: With dead ends: 583 [2021-06-05 23:14:27,240 INFO L226 Difference]: Without dead ends: 552 [2021-06-05 23:14:27,240 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 106.5ms TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:14:27,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-06-05 23:14:27,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 462. [2021-06-05 23:14:27,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 2.0802603036876355) internal successors, (959), 461 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:27,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 959 transitions. [2021-06-05 23:14:27,248 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 959 transitions. Word has length 38 [2021-06-05 23:14:27,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:27,248 INFO L482 AbstractCegarLoop]: Abstraction has 462 states and 959 transitions. [2021-06-05 23:14:27,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:27,248 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 959 transitions. [2021-06-05 23:14:27,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 23:14:27,249 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:27,249 INFO L554 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:14:27,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 23:14:27,465 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:27,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:27,465 INFO L82 PathProgramCache]: Analyzing trace with hash -817344894, now seen corresponding path program 26 times [2021-06-05 23:14:27,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:27,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312028153] [2021-06-05 23:14:27,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:27,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:28,044 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:28,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:28,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312028153] [2021-06-05 23:14:28,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312028153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:28,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722185242] [2021-06-05 23:14:28,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:14:28,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:14:28,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:28,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 63 conjunts are in the unsatisfiable core [2021-06-05 23:14:28,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:28,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:14:28,157 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:28,158 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:28,158 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:28,159 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 23:14:28,165 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:28,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722185242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:28,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:28,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-05 23:14:28,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206492173] [2021-06-05 23:14:28,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 23:14:28,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:28,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 23:14:28,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:14:28,167 INFO L87 Difference]: Start difference. First operand 462 states and 959 transitions. Second operand has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 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 23:14:29,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:29,571 INFO L93 Difference]: Finished difference Result 949 states and 1857 transitions. [2021-06-05 23:14:29,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 23:14:29,571 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 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 39 [2021-06-05 23:14:29,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:29,577 INFO L225 Difference]: With dead ends: 949 [2021-06-05 23:14:29,577 INFO L226 Difference]: Without dead ends: 585 [2021-06-05 23:14:29,578 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 1546.4ms TimeCoverageRelationStatistics Valid=603, Invalid=3303, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 23:14:29,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-06-05 23:14:29,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 91. [2021-06-05 23:14:29,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.9555555555555555) internal successors, (176), 90 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:29,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 176 transitions. [2021-06-05 23:14:29,582 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 176 transitions. Word has length 39 [2021-06-05 23:14:29,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:29,583 INFO L482 AbstractCegarLoop]: Abstraction has 91 states and 176 transitions. [2021-06-05 23:14:29,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 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 23:14:29,583 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 176 transitions. [2021-06-05 23:14:29,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 23:14:29,584 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:29,584 INFO L554 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:14:29,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 23:14:29,797 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:29,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:29,797 INFO L82 PathProgramCache]: Analyzing trace with hash 455182763, now seen corresponding path program 27 times [2021-06-05 23:14:29,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:29,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018812829] [2021-06-05 23:14:29,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:29,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:29,948 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:29,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:29,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018812829] [2021-06-05 23:14:29,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018812829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:29,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388323963] [2021-06-05 23:14:29,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:29,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 23:14:29,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:29,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 23:14:29,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:30,079 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:30,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388323963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:30,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:30,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 18 [2021-06-05 23:14:30,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847767261] [2021-06-05 23:14:30,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 23:14:30,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:30,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 23:14:30,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:14:30,081 INFO L87 Difference]: Start difference. First operand 91 states and 176 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 23:14:30,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:30,128 INFO L93 Difference]: Finished difference Result 645 states and 1230 transitions. [2021-06-05 23:14:30,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 23:14:30,129 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 40 [2021-06-05 23:14:30,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:30,131 INFO L225 Difference]: With dead ends: 645 [2021-06-05 23:14:30,131 INFO L226 Difference]: Without dead ends: 612 [2021-06-05 23:14:30,132 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 120.9ms TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:14:30,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-06-05 23:14:30,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 516. [2021-06-05 23:14:30,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 515 states have (on average 2.0776699029126213) internal successors, (1070), 515 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:30,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 1070 transitions. [2021-06-05 23:14:30,141 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 1070 transitions. Word has length 40 [2021-06-05 23:14:30,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:30,141 INFO L482 AbstractCegarLoop]: Abstraction has 516 states and 1070 transitions. [2021-06-05 23:14:30,142 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 23:14:30,142 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 1070 transitions. [2021-06-05 23:14:30,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 23:14:30,143 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:30,143 INFO L554 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:14:30,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 23:14:30,365 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:30,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:30,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1496120374, now seen corresponding path program 28 times [2021-06-05 23:14:30,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:30,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871849666] [2021-06-05 23:14:30,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:30,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:30,917 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:30,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:30,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871849666] [2021-06-05 23:14:30,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871849666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:30,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457648132] [2021-06-05 23:14:30,917 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:30,959 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:14:30,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:30,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 67 conjunts are in the unsatisfiable core [2021-06-05 23:14:30,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:31,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:14:31,036 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:31,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:31,038 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:31,038 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 23:14:31,045 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:31,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457648132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:31,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:31,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2021-06-05 23:14:31,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136901789] [2021-06-05 23:14:31,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:14:31,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:31,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:14:31,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:14:31,047 INFO L87 Difference]: Start difference. First operand 516 states and 1070 transitions. Second operand has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 34 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 23:14:32,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:32,491 INFO L93 Difference]: Finished difference Result 1059 states and 2075 transitions. [2021-06-05 23:14:32,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 23:14:32,492 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 34 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 41 [2021-06-05 23:14:32,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:32,493 INFO L225 Difference]: With dead ends: 1059 [2021-06-05 23:14:32,493 INFO L226 Difference]: Without dead ends: 655 [2021-06-05 23:14:32,494 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 1586.3ms TimeCoverageRelationStatistics Valid=675, Invalid=3747, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 23:14:32,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2021-06-05 23:14:32,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 96. [2021-06-05 23:14:32,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.9578947368421054) internal successors, (186), 95 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:32,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 186 transitions. [2021-06-05 23:14:32,499 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 186 transitions. Word has length 41 [2021-06-05 23:14:32,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:32,499 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 186 transitions. [2021-06-05 23:14:32,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 34 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 23:14:32,499 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 186 transitions. [2021-06-05 23:14:32,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 23:14:32,500 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:32,500 INFO L554 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:14:32,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:32,713 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:32,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:32,713 INFO L82 PathProgramCache]: Analyzing trace with hash -841837961, now seen corresponding path program 29 times [2021-06-05 23:14:32,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:32,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087468145] [2021-06-05 23:14:32,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:32,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:32,891 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:32,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:32,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087468145] [2021-06-05 23:14:32,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087468145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:32,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102869494] [2021-06-05 23:14:32,891 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:32,939 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 23:14:32,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:32,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 23:14:32,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:33,032 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:33,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102869494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:33,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:33,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 19 [2021-06-05 23:14:33,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364538285] [2021-06-05 23:14:33,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 23:14:33,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:33,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 23:14:33,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-06-05 23:14:33,046 INFO L87 Difference]: Start difference. First operand 96 states and 186 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:33,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:33,093 INFO L93 Difference]: Finished difference Result 710 states and 1357 transitions. [2021-06-05 23:14:33,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 23:14:33,094 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 23:14:33,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:33,095 INFO L225 Difference]: With dead ends: 710 [2021-06-05 23:14:33,095 INFO L226 Difference]: Without dead ends: 675 [2021-06-05 23:14:33,095 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 146.5ms TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-06-05 23:14:33,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2021-06-05 23:14:33,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 573. [2021-06-05 23:14:33,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 572 states have (on average 2.075174825174825) internal successors, (1187), 572 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:33,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1187 transitions. [2021-06-05 23:14:33,110 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1187 transitions. Word has length 42 [2021-06-05 23:14:33,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:33,110 INFO L482 AbstractCegarLoop]: Abstraction has 573 states and 1187 transitions. [2021-06-05 23:14:33,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:33,110 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1187 transitions. [2021-06-05 23:14:33,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 23:14:33,116 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:33,116 INFO L554 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:14:33,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-05 23:14:33,335 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:33,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:33,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1228173758, now seen corresponding path program 30 times [2021-06-05 23:14:33,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:33,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46165002] [2021-06-05 23:14:33,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:33,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:33,970 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:33,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:33,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46165002] [2021-06-05 23:14:33,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46165002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:33,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371365463] [2021-06-05 23:14:33,971 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:34,008 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 23:14:34,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:34,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 23:14:34,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:35,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:14:35,727 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 11 treesize of output 7 [2021-06-05 23:14:35,728 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:35,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:35,733 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:35,733 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2021-06-05 23:14:35,738 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 136 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:35,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371365463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:35,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:35,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 70 [2021-06-05 23:14:35,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344174792] [2021-06-05 23:14:35,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 71 states [2021-06-05 23:14:35,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:35,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-06-05 23:14:35,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=700, Invalid=4270, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 23:14:35,739 INFO L87 Difference]: Start difference. First operand 573 states and 1187 transitions. Second operand has 71 states, 71 states have (on average 1.1408450704225352) internal successors, (81), 70 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:50,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:50,851 INFO L93 Difference]: Finished difference Result 5479 states and 10739 transitions. [2021-06-05 23:14:50,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 225 states. [2021-06-05 23:14:50,852 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.1408450704225352) internal successors, (81), 70 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 23:14:50,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:50,861 INFO L225 Difference]: With dead ends: 5479 [2021-06-05 23:14:50,861 INFO L226 Difference]: Without dead ends: 3672 [2021-06-05 23:14:50,866 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23730 ImplicationChecksByTransitivity, 15582.2ms TimeCoverageRelationStatistics Valid=13164, Invalid=62736, Unknown=0, NotChecked=0, Total=75900 [2021-06-05 23:14:50,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3672 states. [2021-06-05 23:14:50,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3672 to 595. [2021-06-05 23:14:50,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 594 states have (on average 2.0757575757575757) internal successors, (1233), 594 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:50,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 1233 transitions. [2021-06-05 23:14:50,894 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 1233 transitions. Word has length 43 [2021-06-05 23:14:50,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:50,894 INFO L482 AbstractCegarLoop]: Abstraction has 595 states and 1233 transitions. [2021-06-05 23:14:50,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 71 states, 71 states have (on average 1.1408450704225352) internal successors, (81), 70 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:50,894 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 1233 transitions. [2021-06-05 23:14:50,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 23:14:50,896 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:50,896 INFO L554 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:14:51,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:51,109 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:51,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:51,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1297123594, now seen corresponding path program 31 times [2021-06-05 23:14:51,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:51,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536790132] [2021-06-05 23:14:51,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:51,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:51,905 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:51,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:51,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536790132] [2021-06-05 23:14:51,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536790132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:51,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170538604] [2021-06-05 23:14:51,906 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 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 23:14:51,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:51,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 75 conjunts are in the unsatisfiable core [2021-06-05 23:14:51,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:52,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:14:52,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:52,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:52,027 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:52,027 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 23:14:52,032 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:52,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170538604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:52,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:52,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2021-06-05 23:14:52,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736406814] [2021-06-05 23:14:52,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 23:14:52,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:52,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 23:14:52,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:14:52,034 INFO L87 Difference]: Start difference. First operand 595 states and 1233 transitions. Second operand has 39 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 38 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 23:14:53,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:53,876 INFO L93 Difference]: Finished difference Result 1255 states and 2466 transitions. [2021-06-05 23:14:53,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 23:14:53,876 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 38 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 45 [2021-06-05 23:14:53,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:53,885 INFO L225 Difference]: With dead ends: 1255 [2021-06-05 23:14:53,885 INFO L226 Difference]: Without dead ends: 805 [2021-06-05 23:14:53,888 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 2102.5ms TimeCoverageRelationStatistics Valid=831, Invalid=4719, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 23:14:53,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2021-06-05 23:14:53,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 106. [2021-06-05 23:14:53,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.9619047619047618) internal successors, (206), 105 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:53,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 206 transitions. [2021-06-05 23:14:53,894 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 206 transitions. Word has length 45 [2021-06-05 23:14:53,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:53,894 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 206 transitions. [2021-06-05 23:14:53,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 38 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 23:14:53,894 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 206 transitions. [2021-06-05 23:14:53,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 23:14:53,894 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:53,894 INFO L554 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:14:54,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-05 23:14:54,117 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:54,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:54,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1533055049, now seen corresponding path program 32 times [2021-06-05 23:14:54,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:54,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598737234] [2021-06-05 23:14:54,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:54,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:54,344 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:54,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:54,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598737234] [2021-06-05 23:14:54,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598737234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:54,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365112614] [2021-06-05 23:14:54,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:54,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:14:54,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:54,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 23:14:54,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:54,502 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:54,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365112614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:54,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:54,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 21 [2021-06-05 23:14:54,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592637802] [2021-06-05 23:14:54,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:14:54,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:54,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:14:54,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:14:54,503 INFO L87 Difference]: Start difference. First operand 106 states and 206 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:54,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:54,550 INFO L93 Difference]: Finished difference Result 849 states and 1629 transitions. [2021-06-05 23:14:54,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 23:14:54,551 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-06-05 23:14:54,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:54,552 INFO L225 Difference]: With dead ends: 849 [2021-06-05 23:14:54,552 INFO L226 Difference]: Without dead ends: 810 [2021-06-05 23:14:54,553 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 191.5ms TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:14:54,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2021-06-05 23:14:54,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 696. [2021-06-05 23:14:54,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 696 states, 695 states have (on average 2.0705035971223023) internal successors, (1439), 695 states have internal predecessors, (1439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:54,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 1439 transitions. [2021-06-05 23:14:54,562 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 1439 transitions. Word has length 46 [2021-06-05 23:14:54,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:54,562 INFO L482 AbstractCegarLoop]: Abstraction has 696 states and 1439 transitions. [2021-06-05 23:14:54,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:54,562 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 1439 transitions. [2021-06-05 23:14:54,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 23:14:54,563 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:54,563 INFO L554 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:14:54,786 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-05 23:14:54,786 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:54,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:54,786 INFO L82 PathProgramCache]: Analyzing trace with hash 768577026, now seen corresponding path program 33 times [2021-06-05 23:14:54,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:54,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211441412] [2021-06-05 23:14:54,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:54,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:55,550 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:55,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:55,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211441412] [2021-06-05 23:14:55,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211441412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:55,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245345821] [2021-06-05 23:14:55,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:55,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-05 23:14:55,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:55,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 79 conjunts are in the unsatisfiable core [2021-06-05 23:14:55,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:55,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:14:55,684 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:14:55,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:14:55,686 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:14:55,686 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 23:14:55,691 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:55,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245345821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:55,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:55,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2021-06-05 23:14:55,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961456354] [2021-06-05 23:14:55,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-05 23:14:55,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:55,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-05 23:14:55,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 23:14:55,692 INFO L87 Difference]: Start difference. First operand 696 states and 1439 transitions. Second operand has 41 states, 41 states have (on average 1.146341463414634) internal successors, (47), 40 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 23:14:57,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:57,738 INFO L93 Difference]: Finished difference Result 1425 states and 2801 transitions. [2021-06-05 23:14:57,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 23:14:57,738 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.146341463414634) internal successors, (47), 40 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 47 [2021-06-05 23:14:57,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:57,741 INFO L225 Difference]: With dead ends: 1425 [2021-06-05 23:14:57,741 INFO L226 Difference]: Without dead ends: 889 [2021-06-05 23:14:57,741 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 2230.1ms TimeCoverageRelationStatistics Valid=915, Invalid=5247, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 23:14:57,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2021-06-05 23:14:57,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 111. [2021-06-05 23:14:57,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.9636363636363636) internal successors, (216), 110 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:57,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 216 transitions. [2021-06-05 23:14:57,757 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 216 transitions. Word has length 47 [2021-06-05 23:14:57,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:57,757 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 216 transitions. [2021-06-05 23:14:57,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 1.146341463414634) internal successors, (47), 40 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 23:14:57,757 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 216 transitions. [2021-06-05 23:14:57,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-06-05 23:14:57,757 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:57,757 INFO L554 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:14:57,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 23:14:57,973 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:57,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:57,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1920845269, now seen corresponding path program 34 times [2021-06-05 23:14:57,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:57,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373846888] [2021-06-05 23:14:57,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:57,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:58,183 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:58,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:58,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373846888] [2021-06-05 23:14:58,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373846888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:58,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708070671] [2021-06-05 23:14:58,184 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:58,219 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:14:58,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:58,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-05 23:14:58,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:14:58,324 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:58,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708070671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:58,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:14:58,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 22 [2021-06-05 23:14:58,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460794569] [2021-06-05 23:14:58,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:14:58,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:14:58,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:14:58,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:14:58,325 INFO L87 Difference]: Start difference. First operand 111 states and 216 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:58,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:14:58,377 INFO L93 Difference]: Finished difference Result 923 states and 1774 transitions. [2021-06-05 23:14:58,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 23:14:58,377 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-06-05 23:14:58,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:14:58,379 INFO L225 Difference]: With dead ends: 923 [2021-06-05 23:14:58,379 INFO L226 Difference]: Without dead ends: 882 [2021-06-05 23:14:58,379 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 179.9ms TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:14:58,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2021-06-05 23:14:58,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 762. [2021-06-05 23:14:58,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 761 states have (on average 2.0683311432325886) internal successors, (1574), 761 states have internal predecessors, (1574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:58,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 1574 transitions. [2021-06-05 23:14:58,390 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 1574 transitions. Word has length 48 [2021-06-05 23:14:58,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:14:58,390 INFO L482 AbstractCegarLoop]: Abstraction has 762 states and 1574 transitions. [2021-06-05 23:14:58,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:14:58,390 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 1574 transitions. [2021-06-05 23:14:58,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 23:14:58,391 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:14:58,391 INFO L554 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:14:58,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 23:14:58,605 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:14:58,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:14:58,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1960578634, now seen corresponding path program 35 times [2021-06-05 23:14:58,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:14:58,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258750052] [2021-06-05 23:14:58,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:14:58,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:14:59,438 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:14:59,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:14:59,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258750052] [2021-06-05 23:14:59,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258750052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:14:59,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923504375] [2021-06-05 23:14:59,439 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:14:59,485 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 23:14:59,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:14:59,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 23:14:59,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:15:01,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:15:01,753 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 11 treesize of output 7 [2021-06-05 23:15:01,753 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:15:01,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:15:01,758 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:15:01,758 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2021-06-05 23:15:01,770 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 190 proven. 230 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:01,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923504375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:01,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:15:01,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 82 [2021-06-05 23:15:01,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381489273] [2021-06-05 23:15:01,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 83 states [2021-06-05 23:15:01,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:15:01,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-06-05 23:15:01,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=943, Invalid=5863, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 23:15:01,773 INFO L87 Difference]: Start difference. First operand 762 states and 1574 transitions. Second operand has 83 states, 83 states have (on average 1.1204819277108433) internal successors, (93), 82 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:27,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:15:27,805 INFO L93 Difference]: Finished difference Result 8032 states and 15779 transitions. [2021-06-05 23:15:27,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 294 states. [2021-06-05 23:15:27,805 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.1204819277108433) internal successors, (93), 82 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 23:15:27,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:15:27,821 INFO L225 Difference]: With dead ends: 8032 [2021-06-05 23:15:27,821 INFO L226 Difference]: Without dead ends: 5607 [2021-06-05 23:15:27,825 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 352 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41000 ImplicationChecksByTransitivity, 26088.5ms TimeCoverageRelationStatistics Valid=21491, Invalid=103471, Unknown=0, NotChecked=0, Total=124962 [2021-06-05 23:15:27,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5607 states. [2021-06-05 23:15:27,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5607 to 787. [2021-06-05 23:15:27,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787 states, 786 states have (on average 2.068702290076336) internal successors, (1626), 786 states have internal predecessors, (1626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:27,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 1626 transitions. [2021-06-05 23:15:27,885 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 1626 transitions. Word has length 49 [2021-06-05 23:15:27,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:15:27,885 INFO L482 AbstractCegarLoop]: Abstraction has 787 states and 1626 transitions. [2021-06-05 23:15:27,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 83 states, 83 states have (on average 1.1204819277108433) internal successors, (93), 82 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:27,885 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 1626 transitions. [2021-06-05 23:15:27,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-06-05 23:15:27,887 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:15:27,887 INFO L554 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:15:28,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 23:15:28,087 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:15:28,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:15:28,088 INFO L82 PathProgramCache]: Analyzing trace with hash -154382910, now seen corresponding path program 36 times [2021-06-05 23:15:28,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:15:28,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675562663] [2021-06-05 23:15:28,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:15:28,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:29,044 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:29,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:15:29,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675562663] [2021-06-05 23:15:29,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675562663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:29,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121330533] [2021-06-05 23:15:29,045 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:29,089 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-05 23:15:29,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:15:29,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 87 conjunts are in the unsatisfiable core [2021-06-05 23:15:29,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:15:29,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:15:29,188 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:15:29,190 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:15:29,190 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:15:29,190 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 23:15:29,195 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:29,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121330533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:29,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:15:29,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2021-06-05 23:15:29,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634154637] [2021-06-05 23:15:29,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-06-05 23:15:29,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:15:29,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-06-05 23:15:29,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 23:15:29,196 INFO L87 Difference]: Start difference. First operand 787 states and 1626 transitions. Second operand has 45 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 44 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:31,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:15:31,832 INFO L93 Difference]: Finished difference Result 1651 states and 3252 transitions. [2021-06-05 23:15:31,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 23:15:31,832 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 44 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-06-05 23:15:31,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:15:31,835 INFO L225 Difference]: With dead ends: 1651 [2021-06-05 23:15:31,835 INFO L226 Difference]: Without dead ends: 1063 [2021-06-05 23:15:31,835 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 2901.4ms TimeCoverageRelationStatistics Valid=1095, Invalid=6387, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 23:15:31,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1063 states. [2021-06-05 23:15:31,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1063 to 121. [2021-06-05 23:15:31,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.9666666666666666) internal successors, (236), 120 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:31,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 236 transitions. [2021-06-05 23:15:31,841 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 236 transitions. Word has length 51 [2021-06-05 23:15:31,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:15:31,841 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 236 transitions. [2021-06-05 23:15:31,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 44 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:31,841 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 236 transitions. [2021-06-05 23:15:31,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-05 23:15:31,842 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:15:31,842 INFO L554 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:15:32,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 23:15:32,057 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:15:32,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:15:32,057 INFO L82 PathProgramCache]: Analyzing trace with hash -467832213, now seen corresponding path program 37 times [2021-06-05 23:15:32,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:15:32,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385176863] [2021-06-05 23:15:32,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:15:32,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:32,301 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:32,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:15:32,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385176863] [2021-06-05 23:15:32,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385176863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:32,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060631837] [2021-06-05 23:15:32,302 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:32,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:32,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 23:15:32,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:15:32,474 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:32,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060631837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:32,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:15:32,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 24 [2021-06-05 23:15:32,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140338971] [2021-06-05 23:15:32,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:15:32,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:15:32,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:15:32,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:15:32,476 INFO L87 Difference]: Start difference. First operand 121 states and 236 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:32,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:15:32,546 INFO L93 Difference]: Finished difference Result 1080 states and 2082 transitions. [2021-06-05 23:15:32,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 23:15:32,547 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-06-05 23:15:32,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:15:32,552 INFO L225 Difference]: With dead ends: 1080 [2021-06-05 23:15:32,552 INFO L226 Difference]: Without dead ends: 1035 [2021-06-05 23:15:32,553 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 212.3ms TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:15:32,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1035 states. [2021-06-05 23:15:32,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1035 to 903. [2021-06-05 23:15:32,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 903 states, 902 states have (on average 2.0643015521064303) internal successors, (1862), 902 states have internal predecessors, (1862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:32,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 1862 transitions. [2021-06-05 23:15:32,565 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 1862 transitions. Word has length 52 [2021-06-05 23:15:32,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:15:32,565 INFO L482 AbstractCegarLoop]: Abstraction has 903 states and 1862 transitions. [2021-06-05 23:15:32,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:32,565 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 1862 transitions. [2021-06-05 23:15:32,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-05 23:15:32,566 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:15:32,566 INFO L554 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:15:32,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 23:15:32,790 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:15:32,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:15:32,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1135766646, now seen corresponding path program 38 times [2021-06-05 23:15:32,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:15:32,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202389556] [2021-06-05 23:15:32,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:15:32,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:33,891 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:33,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:15:33,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202389556] [2021-06-05 23:15:33,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202389556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:33,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684315211] [2021-06-05 23:15:33,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:33,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:15:33,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:15:33,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 91 conjunts are in the unsatisfiable core [2021-06-05 23:15:33,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:15:34,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:15:34,025 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:15:34,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:15:34,027 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:15:34,027 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 23:15:34,034 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:34,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684315211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:34,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:15:34,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2021-06-05 23:15:34,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687336943] [2021-06-05 23:15:34,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 23:15:34,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:15:34,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 23:15:34,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:15:34,035 INFO L87 Difference]: Start difference. First operand 903 states and 1862 transitions. Second operand has 47 states, 47 states have (on average 1.127659574468085) internal successors, (53), 46 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:36,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:15:36,917 INFO L93 Difference]: Finished difference Result 1845 states and 3635 transitions. [2021-06-05 23:15:36,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 23:15:36,917 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.127659574468085) internal successors, (53), 46 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-06-05 23:15:36,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:15:36,919 INFO L225 Difference]: With dead ends: 1845 [2021-06-05 23:15:36,919 INFO L226 Difference]: Without dead ends: 1159 [2021-06-05 23:15:36,919 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 3213.2ms TimeCoverageRelationStatistics Valid=1191, Invalid=6999, Unknown=0, NotChecked=0, Total=8190 [2021-06-05 23:15:36,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2021-06-05 23:15:36,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 126. [2021-06-05 23:15:36,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.968) internal successors, (246), 125 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:36,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 246 transitions. [2021-06-05 23:15:36,924 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 246 transitions. Word has length 53 [2021-06-05 23:15:36,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:15:36,924 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 246 transitions. [2021-06-05 23:15:36,924 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.127659574468085) internal successors, (53), 46 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:36,924 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 246 transitions. [2021-06-05 23:15:36,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 23:15:36,924 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:15:36,925 INFO L554 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:15:37,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 23:15:37,141 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:15:37,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:15:37,141 INFO L82 PathProgramCache]: Analyzing trace with hash 872098359, now seen corresponding path program 39 times [2021-06-05 23:15:37,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:15:37,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238542691] [2021-06-05 23:15:37,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:15:37,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:37,427 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:37,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:15:37,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238542691] [2021-06-05 23:15:37,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238542691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:37,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474396670] [2021-06-05 23:15:37,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:37,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-05 23:15:37,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:15:37,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 23:15:37,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:15:37,619 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:37,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474396670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:37,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:15:37,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 25 [2021-06-05 23:15:37,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819972681] [2021-06-05 23:15:37,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:15:37,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:15:37,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:15:37,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:15:37,620 INFO L87 Difference]: Start difference. First operand 126 states and 246 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:37,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:15:37,681 INFO L93 Difference]: Finished difference Result 1163 states and 2245 transitions. [2021-06-05 23:15:37,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 23:15:37,681 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 23:15:37,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:15:37,682 INFO L225 Difference]: With dead ends: 1163 [2021-06-05 23:15:37,682 INFO L226 Difference]: Without dead ends: 1116 [2021-06-05 23:15:37,682 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 236.3ms TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:15:37,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2021-06-05 23:15:37,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 978. [2021-06-05 23:15:37,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 978 states, 977 states have (on average 2.0624360286591608) internal successors, (2015), 977 states have internal predecessors, (2015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:37,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 978 states to 978 states and 2015 transitions. [2021-06-05 23:15:37,694 INFO L78 Accepts]: Start accepts. Automaton has 978 states and 2015 transitions. Word has length 54 [2021-06-05 23:15:37,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:15:37,694 INFO L482 AbstractCegarLoop]: Abstraction has 978 states and 2015 transitions. [2021-06-05 23:15:37,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:37,694 INFO L276 IsEmpty]: Start isEmpty. Operand 978 states and 2015 transitions. [2021-06-05 23:15:37,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 23:15:37,695 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:15:37,695 INFO L554 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:15:37,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:37,909 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:15:37,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:15:37,909 INFO L82 PathProgramCache]: Analyzing trace with hash 37342594, now seen corresponding path program 40 times [2021-06-05 23:15:37,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:15:37,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807205480] [2021-06-05 23:15:37,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:15:37,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:39,089 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:39,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:15:39,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807205480] [2021-06-05 23:15:39,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807205480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:39,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447556926] [2021-06-05 23:15:39,089 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:39,128 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:15:39,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:15:39,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 95 conjunts are in the unsatisfiable core [2021-06-05 23:15:39,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:15:39,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:15:39,251 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:15:39,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:15:39,253 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:15:39,253 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 23:15:39,258 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:39,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447556926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:39,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:15:39,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2021-06-05 23:15:39,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330884646] [2021-06-05 23:15:39,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-06-05 23:15:39,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:15:39,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-06-05 23:15:39,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 23:15:39,259 INFO L87 Difference]: Start difference. First operand 978 states and 2015 transitions. Second operand has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 48 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:42,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:15:42,415 INFO L93 Difference]: Finished difference Result 1997 states and 3937 transitions. [2021-06-05 23:15:42,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 23:15:42,415 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 48 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-05 23:15:42,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:15:42,417 INFO L225 Difference]: With dead ends: 1997 [2021-06-05 23:15:42,417 INFO L226 Difference]: Without dead ends: 1257 [2021-06-05 23:15:42,417 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 3513.6ms TimeCoverageRelationStatistics Valid=1291, Invalid=7639, Unknown=0, NotChecked=0, Total=8930 [2021-06-05 23:15:42,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1257 states. [2021-06-05 23:15:42,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1257 to 131. [2021-06-05 23:15:42,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.9692307692307693) internal successors, (256), 130 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:42,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 256 transitions. [2021-06-05 23:15:42,421 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 256 transitions. Word has length 55 [2021-06-05 23:15:42,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:15:42,422 INFO L482 AbstractCegarLoop]: Abstraction has 131 states and 256 transitions. [2021-06-05 23:15:42,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 48 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:42,422 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 256 transitions. [2021-06-05 23:15:42,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-05 23:15:42,422 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:15:42,422 INFO L554 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:15:42,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:42,637 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:15:42,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:15:42,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1180691115, now seen corresponding path program 41 times [2021-06-05 23:15:42,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:15:42,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115254472] [2021-06-05 23:15:42,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:15:42,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:42,927 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:42,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:15:42,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115254472] [2021-06-05 23:15:42,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115254472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:42,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976494029] [2021-06-05 23:15:42,928 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:42,979 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-05 23:15:42,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:15:42,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 23:15:42,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:15:43,097 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:43,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976494029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:43,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:15:43,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 26 [2021-06-05 23:15:43,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804846587] [2021-06-05 23:15:43,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:15:43,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:15:43,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:15:43,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:15:43,098 INFO L87 Difference]: Start difference. First operand 131 states and 256 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:43,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:15:43,159 INFO L93 Difference]: Finished difference Result 1249 states and 2414 transitions. [2021-06-05 23:15:43,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 23:15:43,163 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-06-05 23:15:43,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:15:43,164 INFO L225 Difference]: With dead ends: 1249 [2021-06-05 23:15:43,164 INFO L226 Difference]: Without dead ends: 1200 [2021-06-05 23:15:43,164 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 259.2ms TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:15:43,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2021-06-05 23:15:43,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 1056. [2021-06-05 23:15:43,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1056 states, 1055 states have (on average 2.060663507109005) internal successors, (2174), 1055 states have internal predecessors, (2174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:43,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1056 states to 1056 states and 2174 transitions. [2021-06-05 23:15:43,176 INFO L78 Accepts]: Start accepts. Automaton has 1056 states and 2174 transitions. Word has length 56 [2021-06-05 23:15:43,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:15:43,176 INFO L482 AbstractCegarLoop]: Abstraction has 1056 states and 2174 transitions. [2021-06-05 23:15:43,176 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:43,177 INFO L276 IsEmpty]: Start isEmpty. Operand 1056 states and 2174 transitions. [2021-06-05 23:15:43,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-05 23:15:43,178 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:15:43,178 INFO L554 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:15:43,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-05 23:15:43,394 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:15:43,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:15:43,394 INFO L82 PathProgramCache]: Analyzing trace with hash 2139285302, now seen corresponding path program 42 times [2021-06-05 23:15:43,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:15:43,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982015048] [2021-06-05 23:15:43,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:15:43,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:44,610 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:44,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:15:44,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982015048] [2021-06-05 23:15:44,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982015048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:44,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875069691] [2021-06-05 23:15:44,610 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 23:15:44,659 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-05 23:15:44,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:15:44,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 99 conjunts are in the unsatisfiable core [2021-06-05 23:15:44,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:15:44,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:15:44,795 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:15:44,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:15:44,797 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:15:44,797 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 23:15:44,803 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:44,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875069691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:44,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:15:44,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2021-06-05 23:15:44,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135673361] [2021-06-05 23:15:44,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-06-05 23:15:44,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:15:44,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-06-05 23:15:44,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 23:15:44,806 INFO L87 Difference]: Start difference. First operand 1056 states and 2174 transitions. Second operand has 51 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 50 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:48,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:15:48,229 INFO L93 Difference]: Finished difference Result 2155 states and 4251 transitions. [2021-06-05 23:15:48,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 23:15:48,230 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 50 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-06-05 23:15:48,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:15:48,231 INFO L225 Difference]: With dead ends: 2155 [2021-06-05 23:15:48,231 INFO L226 Difference]: Without dead ends: 1359 [2021-06-05 23:15:48,232 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 3703.3ms TimeCoverageRelationStatistics Valid=1395, Invalid=8307, Unknown=0, NotChecked=0, Total=9702 [2021-06-05 23:15:48,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1359 states. [2021-06-05 23:15:48,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1359 to 136. [2021-06-05 23:15:48,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.9703703703703703) internal successors, (266), 135 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:48,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 266 transitions. [2021-06-05 23:15:48,239 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 266 transitions. Word has length 57 [2021-06-05 23:15:48,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:15:48,239 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 266 transitions. [2021-06-05 23:15:48,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 50 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:48,239 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 266 transitions. [2021-06-05 23:15:48,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-06-05 23:15:48,239 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:15:48,239 INFO L554 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:15:48,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:48,463 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:15:48,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:15:48,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1916405623, now seen corresponding path program 43 times [2021-06-05 23:15:48,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:15:48,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163356375] [2021-06-05 23:15:48,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:15:48,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:48,889 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:48,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:15:48,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163356375] [2021-06-05 23:15:48,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163356375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:48,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052694414] [2021-06-05 23:15:48,889 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 23:15:48,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:48,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 23:15:48,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:15:49,064 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:49,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052694414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:49,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:15:49,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 27 [2021-06-05 23:15:49,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219942907] [2021-06-05 23:15:49,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:15:49,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:15:49,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:15:49,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:15:49,066 INFO L87 Difference]: Start difference. First operand 136 states and 266 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:49,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:15:49,150 INFO L93 Difference]: Finished difference Result 1338 states and 2589 transitions. [2021-06-05 23:15:49,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 23:15:49,151 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-06-05 23:15:49,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:15:49,153 INFO L225 Difference]: With dead ends: 1338 [2021-06-05 23:15:49,153 INFO L226 Difference]: Without dead ends: 1287 [2021-06-05 23:15:49,153 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 349.8ms TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:15:49,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1287 states. [2021-06-05 23:15:49,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1287 to 1137. [2021-06-05 23:15:49,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1137 states, 1136 states have (on average 2.0589788732394365) internal successors, (2339), 1136 states have internal predecessors, (2339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:49,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 2339 transitions. [2021-06-05 23:15:49,167 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 2339 transitions. Word has length 58 [2021-06-05 23:15:49,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:15:49,167 INFO L482 AbstractCegarLoop]: Abstraction has 1137 states and 2339 transitions. [2021-06-05 23:15:49,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:49,167 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 2339 transitions. [2021-06-05 23:15:49,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-05 23:15:49,169 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:15:49,169 INFO L554 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:15:49,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:49,389 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:15:49,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:15:49,389 INFO L82 PathProgramCache]: Analyzing trace with hash -292549310, now seen corresponding path program 44 times [2021-06-05 23:15:49,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:15:49,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483067572] [2021-06-05 23:15:49,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:15:49,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:50,658 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:50,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:15:50,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483067572] [2021-06-05 23:15:50,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483067572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:50,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682323078] [2021-06-05 23:15:50,659 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 23:15:50,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:15:50,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:15:50,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 103 conjunts are in the unsatisfiable core [2021-06-05 23:15:50,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:15:50,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:15:50,844 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:15:50,845 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:15:50,846 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:15:50,846 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 23:15:50,851 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:50,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682323078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:50,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:15:50,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2021-06-05 23:15:50,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138245495] [2021-06-05 23:15:50,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-06-05 23:15:50,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:15:50,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-06-05 23:15:50,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 23:15:50,852 INFO L87 Difference]: Start difference. First operand 1137 states and 2339 transitions. Second operand has 53 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 52 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:54,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:15:54,532 INFO L93 Difference]: Finished difference Result 2319 states and 4577 transitions. [2021-06-05 23:15:54,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 23:15:54,532 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 52 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-06-05 23:15:54,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:15:54,535 INFO L225 Difference]: With dead ends: 2319 [2021-06-05 23:15:54,535 INFO L226 Difference]: Without dead ends: 1465 [2021-06-05 23:15:54,535 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 4003.3ms TimeCoverageRelationStatistics Valid=1503, Invalid=9003, Unknown=0, NotChecked=0, Total=10506 [2021-06-05 23:15:54,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1465 states. [2021-06-05 23:15:54,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1465 to 141. [2021-06-05 23:15:54,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.9714285714285715) internal successors, (276), 140 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:54,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 276 transitions. [2021-06-05 23:15:54,543 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 276 transitions. Word has length 59 [2021-06-05 23:15:54,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:15:54,543 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 276 transitions. [2021-06-05 23:15:54,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 53 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 52 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:54,543 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 276 transitions. [2021-06-05 23:15:54,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-06-05 23:15:54,543 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:15:54,543 INFO L554 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:15:54,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-05 23:15:54,759 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:15:54,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:15:54,759 INFO L82 PathProgramCache]: Analyzing trace with hash -456023317, now seen corresponding path program 45 times [2021-06-05 23:15:54,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:15:54,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705207008] [2021-06-05 23:15:54,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:15:54,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:55,230 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:55,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:15:55,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705207008] [2021-06-05 23:15:55,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705207008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:55,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217983525] [2021-06-05 23:15:55,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:55,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-05 23:15:55,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:15:55,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 23:15:55,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:15:55,421 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:55,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217983525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:55,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:15:55,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 28 [2021-06-05 23:15:55,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832417786] [2021-06-05 23:15:55,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:15:55,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:15:55,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:15:55,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:15:55,423 INFO L87 Difference]: Start difference. First operand 141 states and 276 transitions. Second operand has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:55,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:15:55,496 INFO L93 Difference]: Finished difference Result 1430 states and 2770 transitions. [2021-06-05 23:15:55,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 23:15:55,497 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-06-05 23:15:55,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:15:55,501 INFO L225 Difference]: With dead ends: 1430 [2021-06-05 23:15:55,501 INFO L226 Difference]: Without dead ends: 1377 [2021-06-05 23:15:55,502 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 388.9ms TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:15:55,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1377 states. [2021-06-05 23:15:55,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1377 to 1221. [2021-06-05 23:15:55,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1221 states, 1220 states have (on average 2.057377049180328) internal successors, (2510), 1220 states have internal predecessors, (2510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:55,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 2510 transitions. [2021-06-05 23:15:55,522 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 2510 transitions. Word has length 60 [2021-06-05 23:15:55,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:15:55,522 INFO L482 AbstractCegarLoop]: Abstraction has 1221 states and 2510 transitions. [2021-06-05 23:15:55,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:15:55,523 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 2510 transitions. [2021-06-05 23:15:55,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-06-05 23:15:55,524 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:15:55,524 INFO L554 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:15:55,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-05 23:15:55,748 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:15:55,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:15:55,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1547869706, now seen corresponding path program 46 times [2021-06-05 23:15:55,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:15:55,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443321842] [2021-06-05 23:15:55,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:15:55,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:15:57,329 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:57,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:15:57,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443321842] [2021-06-05 23:15:57,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443321842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:57,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003124021] [2021-06-05 23:15:57,330 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:15:57,372 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:15:57,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:15:57,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 107 conjunts are in the unsatisfiable core [2021-06-05 23:15:57,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:15:57,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:15:57,491 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:15:57,492 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:15:57,493 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:15:57,493 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 23:15:57,498 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:15:57,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003124021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:15:57,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:15:57,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2021-06-05 23:15:57,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614343694] [2021-06-05 23:15:57,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-06-05 23:15:57,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:15:57,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-06-05 23:15:57,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 23:15:57,499 INFO L87 Difference]: Start difference. First operand 1221 states and 2510 transitions. Second operand has 55 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 54 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:01,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:16:01,560 INFO L93 Difference]: Finished difference Result 2489 states and 4915 transitions. [2021-06-05 23:16:01,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 23:16:01,561 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 54 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-06-05 23:16:01,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:16:01,562 INFO L225 Difference]: With dead ends: 2489 [2021-06-05 23:16:01,562 INFO L226 Difference]: Without dead ends: 1575 [2021-06-05 23:16:01,563 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1326 ImplicationChecksByTransitivity, 4525.2ms TimeCoverageRelationStatistics Valid=1615, Invalid=9727, Unknown=0, NotChecked=0, Total=11342 [2021-06-05 23:16:01,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1575 states. [2021-06-05 23:16:01,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1575 to 146. [2021-06-05 23:16:01,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.9724137931034482) internal successors, (286), 145 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:01,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 286 transitions. [2021-06-05 23:16:01,568 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 286 transitions. Word has length 61 [2021-06-05 23:16:01,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:16:01,568 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 286 transitions. [2021-06-05 23:16:01,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 55 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 54 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:01,568 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 286 transitions. [2021-06-05 23:16:01,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-06-05 23:16:01,569 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:16:01,569 INFO L554 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:16:01,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-05 23:16:01,785 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:16:01,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:16:01,785 INFO L82 PathProgramCache]: Analyzing trace with hash -716249929, now seen corresponding path program 47 times [2021-06-05 23:16:01,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:16:01,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76204685] [2021-06-05 23:16:01,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:16:01,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:16:02,199 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:02,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:16:02,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76204685] [2021-06-05 23:16:02,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76204685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:02,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577992870] [2021-06-05 23:16:02,200 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:02,269 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-05 23:16:02,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:16:02,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 54 conjunts are in the unsatisfiable core [2021-06-05 23:16:02,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:16:02,402 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:02,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577992870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:02,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:16:02,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 29 [2021-06-05 23:16:02,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206257464] [2021-06-05 23:16:02,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 23:16:02,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:16:02,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 23:16:02,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:16:02,403 INFO L87 Difference]: Start difference. First operand 146 states and 286 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:02,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:16:02,497 INFO L93 Difference]: Finished difference Result 1525 states and 2957 transitions. [2021-06-05 23:16:02,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 23:16:02,498 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-06-05 23:16:02,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:16:02,500 INFO L225 Difference]: With dead ends: 1525 [2021-06-05 23:16:02,500 INFO L226 Difference]: Without dead ends: 1470 [2021-06-05 23:16:02,500 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 374.2ms TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:16:02,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1470 states. [2021-06-05 23:16:02,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1470 to 1308. [2021-06-05 23:16:02,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1308 states, 1307 states have (on average 2.0558530986993113) internal successors, (2687), 1307 states have internal predecessors, (2687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:02,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1308 states to 1308 states and 2687 transitions. [2021-06-05 23:16:02,515 INFO L78 Accepts]: Start accepts. Automaton has 1308 states and 2687 transitions. Word has length 62 [2021-06-05 23:16:02,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:16:02,515 INFO L482 AbstractCegarLoop]: Abstraction has 1308 states and 2687 transitions. [2021-06-05 23:16:02,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:02,516 INFO L276 IsEmpty]: Start isEmpty. Operand 1308 states and 2687 transitions. [2021-06-05 23:16:02,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-06-05 23:16:02,517 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:16:02,517 INFO L554 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:16:02,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:02,740 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:16:02,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:16:02,741 INFO L82 PathProgramCache]: Analyzing trace with hash -2008609534, now seen corresponding path program 48 times [2021-06-05 23:16:02,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:16:02,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148911166] [2021-06-05 23:16:02,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:16:02,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:16:04,298 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:04,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:16:04,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148911166] [2021-06-05 23:16:04,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148911166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:04,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44624003] [2021-06-05 23:16:04,299 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:04,350 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-05 23:16:04,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:16:04,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 111 conjunts are in the unsatisfiable core [2021-06-05 23:16:04,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:16:04,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:16:04,461 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:16:04,462 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:16:04,462 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:16:04,463 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 23:16:04,468 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:04,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44624003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:04,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:16:04,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2021-06-05 23:16:04,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314537251] [2021-06-05 23:16:04,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-06-05 23:16:04,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:16:04,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-06-05 23:16:04,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 23:16:04,469 INFO L87 Difference]: Start difference. First operand 1308 states and 2687 transitions. Second operand has 57 states, 57 states have (on average 1.105263157894737) internal successors, (63), 56 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:08,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:16:08,830 INFO L93 Difference]: Finished difference Result 2665 states and 5265 transitions. [2021-06-05 23:16:08,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 23:16:08,830 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.105263157894737) internal successors, (63), 56 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-06-05 23:16:08,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:16:08,832 INFO L225 Difference]: With dead ends: 2665 [2021-06-05 23:16:08,832 INFO L226 Difference]: Without dead ends: 1689 [2021-06-05 23:16:08,833 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1431 ImplicationChecksByTransitivity, 4815.6ms TimeCoverageRelationStatistics Valid=1731, Invalid=10479, Unknown=0, NotChecked=0, Total=12210 [2021-06-05 23:16:08,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1689 states. [2021-06-05 23:16:08,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1689 to 151. [2021-06-05 23:16:08,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.9733333333333334) internal successors, (296), 150 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:08,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 296 transitions. [2021-06-05 23:16:08,838 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 296 transitions. Word has length 63 [2021-06-05 23:16:08,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:16:08,838 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 296 transitions. [2021-06-05 23:16:08,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 57 states, 57 states have (on average 1.105263157894737) internal successors, (63), 56 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:08,838 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 296 transitions. [2021-06-05 23:16:08,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-06-05 23:16:08,838 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:16:08,838 INFO L554 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:16:09,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 23:16:09,039 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:16:09,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:16:09,039 INFO L82 PathProgramCache]: Analyzing trace with hash -2114282709, now seen corresponding path program 49 times [2021-06-05 23:16:09,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:16:09,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109895886] [2021-06-05 23:16:09,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:16:09,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:16:09,491 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:09,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:16:09,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109895886] [2021-06-05 23:16:09,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109895886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:09,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525801737] [2021-06-05 23:16:09,492 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:09,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:16:09,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 56 conjunts are in the unsatisfiable core [2021-06-05 23:16:09,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:16:09,667 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:09,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525801737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:09,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:16:09,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 30 [2021-06-05 23:16:09,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202244545] [2021-06-05 23:16:09,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:16:09,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:16:09,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:16:09,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:16:09,669 INFO L87 Difference]: Start difference. First operand 151 states and 296 transitions. Second operand has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 30 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:09,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:16:09,745 INFO L93 Difference]: Finished difference Result 1623 states and 3150 transitions. [2021-06-05 23:16:09,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 23:16:09,749 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 30 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-06-05 23:16:09,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:16:09,751 INFO L225 Difference]: With dead ends: 1623 [2021-06-05 23:16:09,751 INFO L226 Difference]: Without dead ends: 1566 [2021-06-05 23:16:09,751 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 406.6ms TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:16:09,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1566 states. [2021-06-05 23:16:09,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1566 to 1398. [2021-06-05 23:16:09,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1398 states, 1397 states have (on average 2.0544022906227632) internal successors, (2870), 1397 states have internal predecessors, (2870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:09,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1398 states to 1398 states and 2870 transitions. [2021-06-05 23:16:09,767 INFO L78 Accepts]: Start accepts. Automaton has 1398 states and 2870 transitions. Word has length 64 [2021-06-05 23:16:09,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:16:09,767 INFO L482 AbstractCegarLoop]: Abstraction has 1398 states and 2870 transitions. [2021-06-05 23:16:09,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 30 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:09,768 INFO L276 IsEmpty]: Start isEmpty. Operand 1398 states and 2870 transitions. [2021-06-05 23:16:09,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 23:16:09,769 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:16:09,769 INFO L554 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:16:09,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:09,992 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:16:09,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:16:09,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1468652726, now seen corresponding path program 50 times [2021-06-05 23:16:09,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:16:09,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601627260] [2021-06-05 23:16:09,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:16:10,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:16:11,496 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:11,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:16:11,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601627260] [2021-06-05 23:16:11,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601627260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:11,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720027] [2021-06-05 23:16:11,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:11,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:16:11,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:16:11,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 115 conjunts are in the unsatisfiable core [2021-06-05 23:16:11,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:16:11,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:16:11,667 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:16:11,669 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:16:11,669 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:16:11,669 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 23:16:11,674 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:11,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:11,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:16:11,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2021-06-05 23:16:11,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449797576] [2021-06-05 23:16:11,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 59 states [2021-06-05 23:16:11,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:16:11,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-06-05 23:16:11,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 23:16:11,675 INFO L87 Difference]: Start difference. First operand 1398 states and 2870 transitions. Second operand has 59 states, 59 states have (on average 1.1016949152542372) internal successors, (65), 58 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:16,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:16:16,395 INFO L93 Difference]: Finished difference Result 2847 states and 5627 transitions. [2021-06-05 23:16:16,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 23:16:16,396 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.1016949152542372) internal successors, (65), 58 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 23:16:16,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:16:16,398 INFO L225 Difference]: With dead ends: 2847 [2021-06-05 23:16:16,398 INFO L226 Difference]: Without dead ends: 1807 [2021-06-05 23:16:16,399 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1540 ImplicationChecksByTransitivity, 5060.4ms TimeCoverageRelationStatistics Valid=1851, Invalid=11259, Unknown=0, NotChecked=0, Total=13110 [2021-06-05 23:16:16,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1807 states. [2021-06-05 23:16:16,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1807 to 156. [2021-06-05 23:16:16,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.9741935483870967) internal successors, (306), 155 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:16,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 306 transitions. [2021-06-05 23:16:16,407 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 306 transitions. Word has length 65 [2021-06-05 23:16:16,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:16:16,407 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 306 transitions. [2021-06-05 23:16:16,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 59 states, 59 states have (on average 1.1016949152542372) internal successors, (65), 58 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:16,407 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 306 transitions. [2021-06-05 23:16:16,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-05 23:16:16,408 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:16:16,408 INFO L554 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:16:16,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:16,631 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:16:16,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:16:16,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1693335049, now seen corresponding path program 51 times [2021-06-05 23:16:16,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:16:16,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379480287] [2021-06-05 23:16:16,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:16:16,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:16:17,033 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:17,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:16:17,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379480287] [2021-06-05 23:16:17,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379480287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:17,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833935111] [2021-06-05 23:16:17,034 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 23:16:17,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-06-05 23:16:17,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:16:17,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 58 conjunts are in the unsatisfiable core [2021-06-05 23:16:17,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:16:17,224 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:17,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833935111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:17,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:16:17,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 31 [2021-06-05 23:16:17,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104376301] [2021-06-05 23:16:17,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 23:16:17,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:16:17,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 23:16:17,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:16:17,225 INFO L87 Difference]: Start difference. First operand 156 states and 306 transitions. Second operand has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:17,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:16:17,308 INFO L93 Difference]: Finished difference Result 1724 states and 3349 transitions. [2021-06-05 23:16:17,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 23:16:17,308 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-06-05 23:16:17,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:16:17,310 INFO L225 Difference]: With dead ends: 1724 [2021-06-05 23:16:17,310 INFO L226 Difference]: Without dead ends: 1665 [2021-06-05 23:16:17,310 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 365.6ms TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:16:17,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1665 states. [2021-06-05 23:16:17,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1665 to 1491. [2021-06-05 23:16:17,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1491 states, 1490 states have (on average 2.0530201342281877) internal successors, (3059), 1490 states have internal predecessors, (3059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:17,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1491 states to 1491 states and 3059 transitions. [2021-06-05 23:16:17,325 INFO L78 Accepts]: Start accepts. Automaton has 1491 states and 3059 transitions. Word has length 66 [2021-06-05 23:16:17,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:16:17,325 INFO L482 AbstractCegarLoop]: Abstraction has 1491 states and 3059 transitions. [2021-06-05 23:16:17,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:17,325 INFO L276 IsEmpty]: Start isEmpty. Operand 1491 states and 3059 transitions. [2021-06-05 23:16:17,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-06-05 23:16:17,327 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:16:17,327 INFO L554 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:16:17,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-06-05 23:16:17,549 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:16:17,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:16:17,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1238813890, now seen corresponding path program 52 times [2021-06-05 23:16:17,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:16:17,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512985299] [2021-06-05 23:16:17,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:16:17,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:16:19,315 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:19,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:16:19,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512985299] [2021-06-05 23:16:19,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512985299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:19,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864905843] [2021-06-05 23:16:19,316 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 23:16:19,371 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:16:19,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:16:19,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 119 conjunts are in the unsatisfiable core [2021-06-05 23:16:19,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:16:19,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:16:19,500 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:16:19,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:16:19,501 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:16:19,502 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 23:16:19,506 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:19,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864905843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:19,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:16:19,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2021-06-05 23:16:19,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134099611] [2021-06-05 23:16:19,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 61 states [2021-06-05 23:16:19,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:16:19,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-06-05 23:16:19,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=3541, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 23:16:19,507 INFO L87 Difference]: Start difference. First operand 1491 states and 3059 transitions. Second operand has 61 states, 61 states have (on average 1.098360655737705) internal successors, (67), 60 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:24,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:16:24,595 INFO L93 Difference]: Finished difference Result 3035 states and 6001 transitions. [2021-06-05 23:16:24,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 23:16:24,596 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.098360655737705) internal successors, (67), 60 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-06-05 23:16:24,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:16:24,597 INFO L225 Difference]: With dead ends: 3035 [2021-06-05 23:16:24,597 INFO L226 Difference]: Without dead ends: 1929 [2021-06-05 23:16:24,598 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1653 ImplicationChecksByTransitivity, 5612.2ms TimeCoverageRelationStatistics Valid=1975, Invalid=12067, Unknown=0, NotChecked=0, Total=14042 [2021-06-05 23:16:24,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1929 states. [2021-06-05 23:16:24,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1929 to 161. [2021-06-05 23:16:24,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.975) internal successors, (316), 160 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:24,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 316 transitions. [2021-06-05 23:16:24,604 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 316 transitions. Word has length 67 [2021-06-05 23:16:24,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:16:24,604 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 316 transitions. [2021-06-05 23:16:24,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 61 states, 61 states have (on average 1.098360655737705) internal successors, (67), 60 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:24,604 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 316 transitions. [2021-06-05 23:16:24,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-06-05 23:16:24,605 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:16:24,605 INFO L554 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:16:24,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:24,805 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:16:24,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:16:24,806 INFO L82 PathProgramCache]: Analyzing trace with hash -228404373, now seen corresponding path program 53 times [2021-06-05 23:16:24,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:16:24,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766649057] [2021-06-05 23:16:24,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:16:24,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:16:25,233 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:25,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:16:25,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766649057] [2021-06-05 23:16:25,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766649057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:25,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503157183] [2021-06-05 23:16:25,234 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 23:16:25,295 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-05 23:16:25,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:16:25,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 60 conjunts are in the unsatisfiable core [2021-06-05 23:16:25,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:16:25,439 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:25,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503157183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:25,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:16:25,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 32 [2021-06-05 23:16:25,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960456529] [2021-06-05 23:16:25,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 23:16:25,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:16:25,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 23:16:25,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:16:25,440 INFO L87 Difference]: Start difference. First operand 161 states and 316 transitions. Second operand has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:25,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:16:25,523 INFO L93 Difference]: Finished difference Result 1828 states and 3554 transitions. [2021-06-05 23:16:25,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 23:16:25,523 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-06-05 23:16:25,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:16:25,524 INFO L225 Difference]: With dead ends: 1828 [2021-06-05 23:16:25,524 INFO L226 Difference]: Without dead ends: 1767 [2021-06-05 23:16:25,524 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 387.3ms TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:16:25,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1767 states. [2021-06-05 23:16:25,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1767 to 1587. [2021-06-05 23:16:25,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1587 states, 1586 states have (on average 2.051702395964691) internal successors, (3254), 1586 states have internal predecessors, (3254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:25,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1587 states to 1587 states and 3254 transitions. [2021-06-05 23:16:25,538 INFO L78 Accepts]: Start accepts. Automaton has 1587 states and 3254 transitions. Word has length 68 [2021-06-05 23:16:25,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:16:25,538 INFO L482 AbstractCegarLoop]: Abstraction has 1587 states and 3254 transitions. [2021-06-05 23:16:25,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:25,538 INFO L276 IsEmpty]: Start isEmpty. Operand 1587 states and 3254 transitions. [2021-06-05 23:16:25,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-06-05 23:16:25,540 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:16:25,540 INFO L554 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:16:25,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-05 23:16:25,763 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:16:25,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:16:25,763 INFO L82 PathProgramCache]: Analyzing trace with hash 68179830, now seen corresponding path program 54 times [2021-06-05 23:16:25,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:16:25,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410065189] [2021-06-05 23:16:25,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:16:25,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:16:27,647 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:27,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:16:27,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410065189] [2021-06-05 23:16:27,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410065189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:27,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303912986] [2021-06-05 23:16:27,648 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:27,701 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-05 23:16:27,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:16:27,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 123 conjunts are in the unsatisfiable core [2021-06-05 23:16:27,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:16:27,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:16:27,823 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:16:27,824 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:16:27,825 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:16:27,825 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 23:16:27,830 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:27,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303912986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:27,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:16:27,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2021-06-05 23:16:27,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131050014] [2021-06-05 23:16:27,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 63 states [2021-06-05 23:16:27,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:16:27,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-06-05 23:16:27,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 23:16:27,831 INFO L87 Difference]: Start difference. First operand 1587 states and 3254 transitions. Second operand has 63 states, 63 states have (on average 1.0952380952380953) internal successors, (69), 62 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:33,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:16:33,396 INFO L93 Difference]: Finished difference Result 3229 states and 6387 transitions. [2021-06-05 23:16:33,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 23:16:33,397 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.0952380952380953) internal successors, (69), 62 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-06-05 23:16:33,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:16:33,398 INFO L225 Difference]: With dead ends: 3229 [2021-06-05 23:16:33,398 INFO L226 Difference]: Without dead ends: 2055 [2021-06-05 23:16:33,399 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1770 ImplicationChecksByTransitivity, 6120.7ms TimeCoverageRelationStatistics Valid=2103, Invalid=12903, Unknown=0, NotChecked=0, Total=15006 [2021-06-05 23:16:33,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2055 states. [2021-06-05 23:16:33,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2055 to 166. [2021-06-05 23:16:33,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.9757575757575758) internal successors, (326), 165 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:33,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 326 transitions. [2021-06-05 23:16:33,404 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 326 transitions. Word has length 69 [2021-06-05 23:16:33,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:16:33,404 INFO L482 AbstractCegarLoop]: Abstraction has 166 states and 326 transitions. [2021-06-05 23:16:33,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 63 states, 63 states have (on average 1.0952380952380953) internal successors, (69), 62 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:33,404 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 326 transitions. [2021-06-05 23:16:33,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-05 23:16:33,405 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:16:33,405 INFO L554 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:16:33,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-05 23:16:33,616 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:16:33,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:16:33,616 INFO L82 PathProgramCache]: Analyzing trace with hash 2136645431, now seen corresponding path program 55 times [2021-06-05 23:16:33,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:16:33,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646882844] [2021-06-05 23:16:33,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:16:33,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:16:34,054 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:34,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:16:34,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646882844] [2021-06-05 23:16:34,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646882844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:34,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829312258] [2021-06-05 23:16:34,055 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:34,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:16:34,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 62 conjunts are in the unsatisfiable core [2021-06-05 23:16:34,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:16:34,234 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 496 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:34,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829312258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:34,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:16:34,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 33 [2021-06-05 23:16:34,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101064382] [2021-06-05 23:16:34,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 23:16:34,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:16:34,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 23:16:34,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 23:16:34,236 INFO L87 Difference]: Start difference. First operand 166 states and 326 transitions. Second operand has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:34,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:16:34,329 INFO L93 Difference]: Finished difference Result 1935 states and 3765 transitions. [2021-06-05 23:16:34,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 23:16:34,330 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-05 23:16:34,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:16:34,331 INFO L225 Difference]: With dead ends: 1935 [2021-06-05 23:16:34,331 INFO L226 Difference]: Without dead ends: 1872 [2021-06-05 23:16:34,331 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 398.6ms TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 23:16:34,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1872 states. [2021-06-05 23:16:34,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1872 to 1686. [2021-06-05 23:16:34,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1686 states, 1685 states have (on average 2.050445103857567) internal successors, (3455), 1685 states have internal predecessors, (3455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:34,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1686 states to 1686 states and 3455 transitions. [2021-06-05 23:16:34,355 INFO L78 Accepts]: Start accepts. Automaton has 1686 states and 3455 transitions. Word has length 70 [2021-06-05 23:16:34,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:16:34,355 INFO L482 AbstractCegarLoop]: Abstraction has 1686 states and 3455 transitions. [2021-06-05 23:16:34,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:34,355 INFO L276 IsEmpty]: Start isEmpty. Operand 1686 states and 3455 transitions. [2021-06-05 23:16:34,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-06-05 23:16:34,357 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:16:34,357 INFO L554 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:16:34,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:34,557 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:16:34,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:16:34,557 INFO L82 PathProgramCache]: Analyzing trace with hash -608744318, now seen corresponding path program 56 times [2021-06-05 23:16:34,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:16:34,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898820684] [2021-06-05 23:16:34,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:16:34,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:16:36,360 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:36,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:16:36,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898820684] [2021-06-05 23:16:36,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898820684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:36,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056898232] [2021-06-05 23:16:36,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:36,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:16:36,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:16:36,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 127 conjunts are in the unsatisfiable core [2021-06-05 23:16:36,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:16:36,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:16:36,539 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:16:36,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:16:36,540 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:16:36,541 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 23:16:36,546 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:36,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056898232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:36,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:16:36,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2021-06-05 23:16:36,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824420804] [2021-06-05 23:16:36,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 65 states [2021-06-05 23:16:36,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:16:36,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-06-05 23:16:36,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=4033, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 23:16:36,547 INFO L87 Difference]: Start difference. First operand 1686 states and 3455 transitions. Second operand has 65 states, 65 states have (on average 1.0923076923076922) internal successors, (71), 64 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:42,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:16:42,606 INFO L93 Difference]: Finished difference Result 3429 states and 6785 transitions. [2021-06-05 23:16:42,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 23:16:42,607 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.0923076923076922) internal successors, (71), 64 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-06-05 23:16:42,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:16:42,609 INFO L225 Difference]: With dead ends: 3429 [2021-06-05 23:16:42,609 INFO L226 Difference]: Without dead ends: 2185 [2021-06-05 23:16:42,610 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1891 ImplicationChecksByTransitivity, 6368.8ms TimeCoverageRelationStatistics Valid=2235, Invalid=13767, Unknown=0, NotChecked=0, Total=16002 [2021-06-05 23:16:42,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2185 states. [2021-06-05 23:16:42,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2185 to 171. [2021-06-05 23:16:42,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.9764705882352942) internal successors, (336), 170 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:42,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 336 transitions. [2021-06-05 23:16:42,615 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 336 transitions. Word has length 71 [2021-06-05 23:16:42,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:16:42,616 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 336 transitions. [2021-06-05 23:16:42,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 65 states, 65 states have (on average 1.0923076923076922) internal successors, (71), 64 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:42,616 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 336 transitions. [2021-06-05 23:16:42,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-06-05 23:16:42,616 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:16:42,616 INFO L554 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:16:42,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-05 23:16:42,821 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:16:42,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:16:42,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1668133973, now seen corresponding path program 57 times [2021-06-05 23:16:42,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:16:42,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968864421] [2021-06-05 23:16:42,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:16:42,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:16:43,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:43,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:16:43,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968864421] [2021-06-05 23:16:43,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968864421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:43,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540685136] [2021-06-05 23:16:43,282 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 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 23:16:43,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-06-05 23:16:43,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:16:43,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 64 conjunts are in the unsatisfiable core [2021-06-05 23:16:43,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:16:43,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 528 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:43,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540685136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:43,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:16:43,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 34 [2021-06-05 23:16:43,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656195198] [2021-06-05 23:16:43,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:16:43,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:16:43,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:16:43,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:16:43,481 INFO L87 Difference]: Start difference. First operand 171 states and 336 transitions. Second operand has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:43,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:16:43,587 INFO L93 Difference]: Finished difference Result 2045 states and 3982 transitions. [2021-06-05 23:16:43,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 23:16:43,588 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-06-05 23:16:43,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:16:43,589 INFO L225 Difference]: With dead ends: 2045 [2021-06-05 23:16:43,589 INFO L226 Difference]: Without dead ends: 1980 [2021-06-05 23:16:43,589 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 420.7ms TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:16:43,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1980 states. [2021-06-05 23:16:43,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1980 to 1788. [2021-06-05 23:16:43,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1788 states, 1787 states have (on average 2.0492445439283715) internal successors, (3662), 1787 states have internal predecessors, (3662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:43,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1788 states to 1788 states and 3662 transitions. [2021-06-05 23:16:43,602 INFO L78 Accepts]: Start accepts. Automaton has 1788 states and 3662 transitions. Word has length 72 [2021-06-05 23:16:43,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:16:43,602 INFO L482 AbstractCegarLoop]: Abstraction has 1788 states and 3662 transitions. [2021-06-05 23:16:43,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:43,603 INFO L276 IsEmpty]: Start isEmpty. Operand 1788 states and 3662 transitions. [2021-06-05 23:16:43,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-06-05 23:16:43,604 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:16:43,604 INFO L554 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:16:43,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:43,804 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:16:43,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:16:43,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1417204278, now seen corresponding path program 58 times [2021-06-05 23:16:43,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:16:43,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307588524] [2021-06-05 23:16:43,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:16:43,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:16:45,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:45,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:16:45,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307588524] [2021-06-05 23:16:45,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307588524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:45,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504001625] [2021-06-05 23:16:45,718 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:16:45,765 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:16:45,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:16:45,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 131 conjunts are in the unsatisfiable core [2021-06-05 23:16:45,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:16:45,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:16:45,894 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:16:45,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:16:45,896 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:16:45,896 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 23:16:45,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:45,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504001625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:45,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:16:45,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2021-06-05 23:16:45,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440163582] [2021-06-05 23:16:45,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 67 states [2021-06-05 23:16:45,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:16:45,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-06-05 23:16:45,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=4291, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 23:16:45,902 INFO L87 Difference]: Start difference. First operand 1788 states and 3662 transitions. Second operand has 67 states, 67 states have (on average 1.0895522388059702) internal successors, (73), 66 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:52,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:16:52,341 INFO L93 Difference]: Finished difference Result 3635 states and 7195 transitions. [2021-06-05 23:16:52,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 23:16:52,342 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.0895522388059702) internal successors, (73), 66 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-06-05 23:16:52,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:16:52,345 INFO L225 Difference]: With dead ends: 3635 [2021-06-05 23:16:52,346 INFO L226 Difference]: Without dead ends: 2319 [2021-06-05 23:16:52,347 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2016 ImplicationChecksByTransitivity, 6793.5ms TimeCoverageRelationStatistics Valid=2371, Invalid=14659, Unknown=0, NotChecked=0, Total=17030 [2021-06-05 23:16:52,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2319 states. [2021-06-05 23:16:52,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2319 to 176. [2021-06-05 23:16:52,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.977142857142857) internal successors, (346), 175 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:52,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 346 transitions. [2021-06-05 23:16:52,355 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 346 transitions. Word has length 73 [2021-06-05 23:16:52,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:16:52,356 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 346 transitions. [2021-06-05 23:16:52,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 67 states, 67 states have (on average 1.0895522388059702) internal successors, (73), 66 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:52,356 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 346 transitions. [2021-06-05 23:16:52,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-06-05 23:16:52,356 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:16:52,356 INFO L554 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:16:52,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-05 23:16:52,558 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:16:52,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:16:52,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1006730359, now seen corresponding path program 59 times [2021-06-05 23:16:52,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:16:52,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148336481] [2021-06-05 23:16:52,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:16:52,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:16:53,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:53,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:16:53,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148336481] [2021-06-05 23:16:53,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148336481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:53,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481720396] [2021-06-05 23:16:53,062 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:53,127 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-06-05 23:16:53,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:16:53,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 66 conjunts are in the unsatisfiable core [2021-06-05 23:16:53,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:16:53,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 561 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:53,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481720396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:53,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:16:53,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 35 [2021-06-05 23:16:53,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339394671] [2021-06-05 23:16:53,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 23:16:53,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:16:53,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 23:16:53,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:16:53,268 INFO L87 Difference]: Start difference. First operand 176 states and 346 transitions. Second operand has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:53,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:16:53,374 INFO L93 Difference]: Finished difference Result 2158 states and 4205 transitions. [2021-06-05 23:16:53,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 23:16:53,374 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-06-05 23:16:53,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:16:53,375 INFO L225 Difference]: With dead ends: 2158 [2021-06-05 23:16:53,375 INFO L226 Difference]: Without dead ends: 2091 [2021-06-05 23:16:53,376 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 459.8ms TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:16:53,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2091 states. [2021-06-05 23:16:53,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2091 to 1893. [2021-06-05 23:16:53,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1893 states, 1892 states have (on average 2.0480972515856237) internal successors, (3875), 1892 states have internal predecessors, (3875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:53,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1893 states to 1893 states and 3875 transitions. [2021-06-05 23:16:53,389 INFO L78 Accepts]: Start accepts. Automaton has 1893 states and 3875 transitions. Word has length 74 [2021-06-05 23:16:53,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:16:53,389 INFO L482 AbstractCegarLoop]: Abstraction has 1893 states and 3875 transitions. [2021-06-05 23:16:53,389 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:16:53,389 INFO L276 IsEmpty]: Start isEmpty. Operand 1893 states and 3875 transitions. [2021-06-05 23:16:53,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 23:16:53,391 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:16:53,391 INFO L554 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:16:53,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:53,591 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:16:53,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:16:53,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1805611966, now seen corresponding path program 60 times [2021-06-05 23:16:53,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:16:53,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299683517] [2021-06-05 23:16:53,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:16:53,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:16:55,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:55,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:16:55,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299683517] [2021-06-05 23:16:55,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299683517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:55,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478372141] [2021-06-05 23:16:55,609 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:16:55,670 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2021-06-05 23:16:55,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:16:55,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 135 conjunts are in the unsatisfiable core [2021-06-05 23:16:55,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:16:55,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:16:55,803 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:16:55,804 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:16:55,804 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:16:55,805 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 23:16:55,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:16:55,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478372141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:16:55,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:16:55,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2021-06-05 23:16:55,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285651672] [2021-06-05 23:16:55,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 69 states [2021-06-05 23:16:55,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:16:55,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-06-05 23:16:55,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=4557, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 23:16:55,811 INFO L87 Difference]: Start difference. First operand 1893 states and 3875 transitions. Second operand has 69 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 68 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:02,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:17:02,656 INFO L93 Difference]: Finished difference Result 3847 states and 7617 transitions. [2021-06-05 23:17:02,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 23:17:02,657 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 68 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-06-05 23:17:02,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:17:02,658 INFO L225 Difference]: With dead ends: 3847 [2021-06-05 23:17:02,659 INFO L226 Difference]: Without dead ends: 2457 [2021-06-05 23:17:02,659 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2145 ImplicationChecksByTransitivity, 7256.7ms TimeCoverageRelationStatistics Valid=2511, Invalid=15579, Unknown=0, NotChecked=0, Total=18090 [2021-06-05 23:17:02,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2457 states. [2021-06-05 23:17:02,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2457 to 181. [2021-06-05 23:17:02,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.9777777777777779) internal successors, (356), 180 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:02,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 356 transitions. [2021-06-05 23:17:02,666 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 356 transitions. Word has length 75 [2021-06-05 23:17:02,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:17:02,666 INFO L482 AbstractCegarLoop]: Abstraction has 181 states and 356 transitions. [2021-06-05 23:17:02,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 69 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 68 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:02,666 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 356 transitions. [2021-06-05 23:17:02,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-05 23:17:02,667 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:17:02,667 INFO L554 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:17:02,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-06-05 23:17:02,867 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:17:02,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:17:02,868 INFO L82 PathProgramCache]: Analyzing trace with hash -116325397, now seen corresponding path program 61 times [2021-06-05 23:17:02,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:17:02,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560726369] [2021-06-05 23:17:02,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:17:02,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:17:03,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:17:03,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:17:03,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560726369] [2021-06-05 23:17:03,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560726369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:17:03,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954215187] [2021-06-05 23:17:03,388 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:17:03,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:17:03,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 68 conjunts are in the unsatisfiable core [2021-06-05 23:17:03,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:17:03,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 595 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:17:03,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954215187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:17:03,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:17:03,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 36 [2021-06-05 23:17:03,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811605432] [2021-06-05 23:17:03,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 23:17:03,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:17:03,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 23:17:03,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:17:03,605 INFO L87 Difference]: Start difference. First operand 181 states and 356 transitions. Second operand has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:03,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:17:03,711 INFO L93 Difference]: Finished difference Result 2274 states and 4434 transitions. [2021-06-05 23:17:03,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 23:17:03,711 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-06-05 23:17:03,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:17:03,713 INFO L225 Difference]: With dead ends: 2274 [2021-06-05 23:17:03,713 INFO L226 Difference]: Without dead ends: 2205 [2021-06-05 23:17:03,713 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 477.9ms TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:17:03,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2205 states. [2021-06-05 23:17:03,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2205 to 2001. [2021-06-05 23:17:03,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2001 states, 2000 states have (on average 2.047) internal successors, (4094), 2000 states have internal predecessors, (4094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:03,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2001 states to 2001 states and 4094 transitions. [2021-06-05 23:17:03,727 INFO L78 Accepts]: Start accepts. Automaton has 2001 states and 4094 transitions. Word has length 76 [2021-06-05 23:17:03,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:17:03,727 INFO L482 AbstractCegarLoop]: Abstraction has 2001 states and 4094 transitions. [2021-06-05 23:17:03,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:03,727 INFO L276 IsEmpty]: Start isEmpty. Operand 2001 states and 4094 transitions. [2021-06-05 23:17:03,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-06-05 23:17:03,729 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:17:03,729 INFO L554 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:17:03,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:17:03,945 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:17:03,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:17:03,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1242870538, now seen corresponding path program 62 times [2021-06-05 23:17:03,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:17:03,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883434809] [2021-06-05 23:17:03,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:17:03,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:17:06,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:17:06,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:17:06,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883434809] [2021-06-05 23:17:06,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883434809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:17:06,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520157832] [2021-06-05 23:17:06,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:17:06,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:17:06,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:17:06,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 139 conjunts are in the unsatisfiable core [2021-06-05 23:17:06,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:17:06,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:17:06,277 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:17:06,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:17:06,278 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:17:06,278 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 23:17:06,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:17:06,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520157832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:17:06,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:17:06,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2021-06-05 23:17:06,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538427377] [2021-06-05 23:17:06,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 71 states [2021-06-05 23:17:06,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:17:06,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-06-05 23:17:06,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=4831, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 23:17:06,285 INFO L87 Difference]: Start difference. First operand 2001 states and 4094 transitions. Second operand has 71 states, 71 states have (on average 1.0845070422535212) internal successors, (77), 70 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:13,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:17:13,638 INFO L93 Difference]: Finished difference Result 4065 states and 8051 transitions. [2021-06-05 23:17:13,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 23:17:13,639 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.0845070422535212) internal successors, (77), 70 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-06-05 23:17:13,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:17:13,641 INFO L225 Difference]: With dead ends: 4065 [2021-06-05 23:17:13,641 INFO L226 Difference]: Without dead ends: 2599 [2021-06-05 23:17:13,642 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2278 ImplicationChecksByTransitivity, 7792.5ms TimeCoverageRelationStatistics Valid=2655, Invalid=16527, Unknown=0, NotChecked=0, Total=19182 [2021-06-05 23:17:13,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2599 states. [2021-06-05 23:17:13,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2599 to 186. [2021-06-05 23:17:13,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.9783783783783784) internal successors, (366), 185 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:13,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 366 transitions. [2021-06-05 23:17:13,649 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 366 transitions. Word has length 77 [2021-06-05 23:17:13,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:17:13,650 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 366 transitions. [2021-06-05 23:17:13,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 71 states, 71 states have (on average 1.0845070422535212) internal successors, (77), 70 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:13,650 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 366 transitions. [2021-06-05 23:17:13,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-06-05 23:17:13,650 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:17:13,650 INFO L554 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:17:13,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-06-05 23:17:13,873 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:17:13,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:17:13,873 INFO L82 PathProgramCache]: Analyzing trace with hash 148789687, now seen corresponding path program 63 times [2021-06-05 23:17:13,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:17:13,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423937357] [2021-06-05 23:17:13,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:17:13,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:17:14,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:17:14,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:17:14,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423937357] [2021-06-05 23:17:14,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423937357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:17:14,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138445645] [2021-06-05 23:17:14,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:17:14,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2021-06-05 23:17:14,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:17:14,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 70 conjunts are in the unsatisfiable core [2021-06-05 23:17:14,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:17:14,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 630 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:17:14,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138445645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:17:14,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:17:14,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 37 [2021-06-05 23:17:14,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146886352] [2021-06-05 23:17:14,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 23:17:14,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:17:14,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 23:17:14,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:17:14,766 INFO L87 Difference]: Start difference. First operand 186 states and 366 transitions. Second operand has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:14,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:17:14,887 INFO L93 Difference]: Finished difference Result 2393 states and 4669 transitions. [2021-06-05 23:17:14,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 23:17:14,888 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-06-05 23:17:14,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:17:14,890 INFO L225 Difference]: With dead ends: 2393 [2021-06-05 23:17:14,890 INFO L226 Difference]: Without dead ends: 2322 [2021-06-05 23:17:14,890 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 607.2ms TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:17:14,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2322 states. [2021-06-05 23:17:14,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2322 to 2112. [2021-06-05 23:17:14,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2112 states, 2111 states have (on average 2.045949786830886) internal successors, (4319), 2111 states have internal predecessors, (4319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:14,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2112 states to 2112 states and 4319 transitions. [2021-06-05 23:17:14,910 INFO L78 Accepts]: Start accepts. Automaton has 2112 states and 4319 transitions. Word has length 78 [2021-06-05 23:17:14,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:17:14,910 INFO L482 AbstractCegarLoop]: Abstraction has 2112 states and 4319 transitions. [2021-06-05 23:17:14,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 37 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:14,911 INFO L276 IsEmpty]: Start isEmpty. Operand 2112 states and 4319 transitions. [2021-06-05 23:17:14,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-06-05 23:17:14,912 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:17:14,912 INFO L554 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:17:15,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:17:15,113 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:17:15,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:17:15,113 INFO L82 PathProgramCache]: Analyzing trace with hash -129332222, now seen corresponding path program 64 times [2021-06-05 23:17:15,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:17:15,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974168857] [2021-06-05 23:17:15,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:17:15,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:17:17,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:17:17,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:17:17,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974168857] [2021-06-05 23:17:17,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974168857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:17:17,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102321605] [2021-06-05 23:17:17,396 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:17:17,450 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:17:17,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:17:17,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 143 conjunts are in the unsatisfiable core [2021-06-05 23:17:17,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:17:17,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:17:17,592 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:17:17,593 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:17:17,593 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:17:17,593 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 23:17:17,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:17:17,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102321605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:17:17,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:17:17,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2021-06-05 23:17:17,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475851179] [2021-06-05 23:17:17,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 73 states [2021-06-05 23:17:17,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:17:17,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-06-05 23:17:17,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=5113, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 23:17:17,600 INFO L87 Difference]: Start difference. First operand 2112 states and 4319 transitions. Second operand has 73 states, 73 states have (on average 1.082191780821918) internal successors, (79), 72 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:25,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:17:25,470 INFO L93 Difference]: Finished difference Result 4289 states and 8497 transitions. [2021-06-05 23:17:25,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 23:17:25,470 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.082191780821918) internal successors, (79), 72 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-06-05 23:17:25,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:17:25,472 INFO L225 Difference]: With dead ends: 4289 [2021-06-05 23:17:25,472 INFO L226 Difference]: Without dead ends: 2745 [2021-06-05 23:17:25,473 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2415 ImplicationChecksByTransitivity, 8345.1ms TimeCoverageRelationStatistics Valid=2803, Invalid=17503, Unknown=0, NotChecked=0, Total=20306 [2021-06-05 23:17:25,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2745 states. [2021-06-05 23:17:25,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2745 to 191. [2021-06-05 23:17:25,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.9789473684210526) internal successors, (376), 190 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:25,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 376 transitions. [2021-06-05 23:17:25,482 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 376 transitions. Word has length 79 [2021-06-05 23:17:25,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:17:25,483 INFO L482 AbstractCegarLoop]: Abstraction has 191 states and 376 transitions. [2021-06-05 23:17:25,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 73 states, 73 states have (on average 1.082191780821918) internal successors, (79), 72 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:25,483 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 376 transitions. [2021-06-05 23:17:25,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 23:17:25,483 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:17:25,483 INFO L554 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:17:25,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-05 23:17:25,706 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:17:25,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:17:25,706 INFO L82 PathProgramCache]: Analyzing trace with hash 308739115, now seen corresponding path program 65 times [2021-06-05 23:17:25,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:17:25,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431359365] [2021-06-05 23:17:25,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:17:25,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:17:26,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:17:26,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:17:26,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431359365] [2021-06-05 23:17:26,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431359365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:17:26,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534152762] [2021-06-05 23:17:26,298 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:17:26,373 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2021-06-05 23:17:26,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:17:26,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 72 conjunts are in the unsatisfiable core [2021-06-05 23:17:26,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:17:26,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 666 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:17:26,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534152762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:17:26,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:17:26,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 38 [2021-06-05 23:17:26,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283812099] [2021-06-05 23:17:26,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 23:17:26,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:17:26,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 23:17:26,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:17:26,543 INFO L87 Difference]: Start difference. First operand 191 states and 376 transitions. Second operand has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:26,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:17:26,662 INFO L93 Difference]: Finished difference Result 2515 states and 4910 transitions. [2021-06-05 23:17:26,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 23:17:26,663 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-05 23:17:26,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:17:26,664 INFO L225 Difference]: With dead ends: 2515 [2021-06-05 23:17:26,664 INFO L226 Difference]: Without dead ends: 2442 [2021-06-05 23:17:26,665 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 548.3ms TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:17:26,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2442 states. [2021-06-05 23:17:26,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2442 to 2226. [2021-06-05 23:17:26,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2226 states, 2225 states have (on average 2.044943820224719) internal successors, (4550), 2225 states have internal predecessors, (4550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:26,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2226 states to 2226 states and 4550 transitions. [2021-06-05 23:17:26,679 INFO L78 Accepts]: Start accepts. Automaton has 2226 states and 4550 transitions. Word has length 80 [2021-06-05 23:17:26,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:17:26,680 INFO L482 AbstractCegarLoop]: Abstraction has 2226 states and 4550 transitions. [2021-06-05 23:17:26,680 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:26,680 INFO L276 IsEmpty]: Start isEmpty. Operand 2226 states and 4550 transitions. [2021-06-05 23:17:26,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-06-05 23:17:26,682 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:17:26,682 INFO L554 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:17:26,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-05 23:17:26,882 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:17:26,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:17:26,882 INFO L82 PathProgramCache]: Analyzing trace with hash -678443082, now seen corresponding path program 66 times [2021-06-05 23:17:26,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:17:26,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885173135] [2021-06-05 23:17:26,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:17:26,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:17:29,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:17:29,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:17:29,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885173135] [2021-06-05 23:17:29,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885173135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:17:29,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965792462] [2021-06-05 23:17:29,393 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:17:29,458 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-06-05 23:17:29,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:17:29,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 147 conjunts are in the unsatisfiable core [2021-06-05 23:17:29,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:17:29,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:17:29,611 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:17:29,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:17:29,612 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:17:29,613 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 23:17:29,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:17:29,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965792462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:17:29,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:17:29,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2021-06-05 23:17:29,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470024832] [2021-06-05 23:17:29,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 75 states [2021-06-05 23:17:29,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:17:29,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-06-05 23:17:29,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=5403, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 23:17:29,619 INFO L87 Difference]: Start difference. First operand 2226 states and 4550 transitions. Second operand has 75 states, 75 states have (on average 1.08) internal successors, (81), 74 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:37,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:17:37,991 INFO L93 Difference]: Finished difference Result 4519 states and 8955 transitions. [2021-06-05 23:17:37,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 23:17:37,991 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.08) internal successors, (81), 74 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-06-05 23:17:37,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:17:37,994 INFO L225 Difference]: With dead ends: 4519 [2021-06-05 23:17:37,994 INFO L226 Difference]: Without dead ends: 2895 [2021-06-05 23:17:37,995 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2556 ImplicationChecksByTransitivity, 8976.5ms TimeCoverageRelationStatistics Valid=2955, Invalid=18507, Unknown=0, NotChecked=0, Total=21462 [2021-06-05 23:17:37,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2895 states. [2021-06-05 23:17:38,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2895 to 196. [2021-06-05 23:17:38,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 1.9794871794871796) internal successors, (386), 195 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:38,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 386 transitions. [2021-06-05 23:17:38,005 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 386 transitions. Word has length 81 [2021-06-05 23:17:38,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:17:38,005 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 386 transitions. [2021-06-05 23:17:38,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 75 states, 75 states have (on average 1.08) internal successors, (81), 74 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:38,005 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 386 transitions. [2021-06-05 23:17:38,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-06-05 23:17:38,006 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:17:38,006 INFO L554 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:17:38,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-05 23:17:38,221 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:17:38,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:17:38,221 INFO L82 PathProgramCache]: Analyzing trace with hash 466171639, now seen corresponding path program 67 times [2021-06-05 23:17:38,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:17:38,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203969916] [2021-06-05 23:17:38,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:17:38,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:17:38,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:17:38,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:17:38,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203969916] [2021-06-05 23:17:38,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203969916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:17:38,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090166317] [2021-06-05 23:17:38,807 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:17:38,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:17:38,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 74 conjunts are in the unsatisfiable core [2021-06-05 23:17:38,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:17:39,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 703 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:17:39,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090166317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:17:39,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:17:39,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 39 [2021-06-05 23:17:39,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093551200] [2021-06-05 23:17:39,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 23:17:39,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:17:39,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 23:17:39,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 23:17:39,036 INFO L87 Difference]: Start difference. First operand 196 states and 386 transitions. Second operand has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:39,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:17:39,189 INFO L93 Difference]: Finished difference Result 2640 states and 5157 transitions. [2021-06-05 23:17:39,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 23:17:39,190 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-06-05 23:17:39,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:17:39,191 INFO L225 Difference]: With dead ends: 2640 [2021-06-05 23:17:39,191 INFO L226 Difference]: Without dead ends: 2565 [2021-06-05 23:17:39,191 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 540.5ms TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 23:17:39,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2565 states. [2021-06-05 23:17:39,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2565 to 2343. [2021-06-05 23:17:39,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2343 states, 2342 states have (on average 2.04397950469684) internal successors, (4787), 2342 states have internal predecessors, (4787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:39,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2343 states to 2343 states and 4787 transitions. [2021-06-05 23:17:39,208 INFO L78 Accepts]: Start accepts. Automaton has 2343 states and 4787 transitions. Word has length 82 [2021-06-05 23:17:39,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:17:39,208 INFO L482 AbstractCegarLoop]: Abstraction has 2343 states and 4787 transitions. [2021-06-05 23:17:39,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:39,208 INFO L276 IsEmpty]: Start isEmpty. Operand 2343 states and 4787 transitions. [2021-06-05 23:17:39,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-06-05 23:17:39,210 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:17:39,210 INFO L554 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:17:39,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:17:39,411 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:17:39,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:17:39,411 INFO L82 PathProgramCache]: Analyzing trace with hash 971852738, now seen corresponding path program 68 times [2021-06-05 23:17:39,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:17:39,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756988792] [2021-06-05 23:17:39,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:17:39,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:17:41,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:17:41,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:17:41,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756988792] [2021-06-05 23:17:41,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756988792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:17:41,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737836377] [2021-06-05 23:17:41,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:17:41,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:17:41,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:17:41,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 151 conjunts are in the unsatisfiable core [2021-06-05 23:17:41,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:17:42,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:17:42,168 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:17:42,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:17:42,170 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:17:42,170 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 23:17:42,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:17:42,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737836377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:17:42,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:17:42,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2021-06-05 23:17:42,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974396934] [2021-06-05 23:17:42,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 77 states [2021-06-05 23:17:42,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:17:42,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-06-05 23:17:42,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=5701, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 23:17:42,177 INFO L87 Difference]: Start difference. First operand 2343 states and 4787 transitions. Second operand has 77 states, 77 states have (on average 1.077922077922078) internal successors, (83), 76 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:51,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:17:51,096 INFO L93 Difference]: Finished difference Result 4755 states and 9425 transitions. [2021-06-05 23:17:51,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-06-05 23:17:51,097 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.077922077922078) internal successors, (83), 76 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-06-05 23:17:51,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:17:51,099 INFO L225 Difference]: With dead ends: 4755 [2021-06-05 23:17:51,099 INFO L226 Difference]: Without dead ends: 3049 [2021-06-05 23:17:51,100 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2701 ImplicationChecksByTransitivity, 9433.5ms TimeCoverageRelationStatistics Valid=3111, Invalid=19539, Unknown=0, NotChecked=0, Total=22650 [2021-06-05 23:17:51,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3049 states. [2021-06-05 23:17:51,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3049 to 201. [2021-06-05 23:17:51,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 1.98) internal successors, (396), 200 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:51,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 396 transitions. [2021-06-05 23:17:51,109 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 396 transitions. Word has length 83 [2021-06-05 23:17:51,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:17:51,109 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 396 transitions. [2021-06-05 23:17:51,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 77 states, 77 states have (on average 1.077922077922078) internal successors, (83), 76 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:51,109 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 396 transitions. [2021-06-05 23:17:51,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-06-05 23:17:51,109 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:17:51,109 INFO L554 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:17:51,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-05 23:17:51,310 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:17:51,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:17:51,310 INFO L82 PathProgramCache]: Analyzing trace with hash 85734507, now seen corresponding path program 69 times [2021-06-05 23:17:51,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:17:51,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466317507] [2021-06-05 23:17:51,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:17:51,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:17:51,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 741 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:17:51,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:17:51,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466317507] [2021-06-05 23:17:51,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466317507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:17:51,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663877497] [2021-06-05 23:17:51,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:17:52,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2021-06-05 23:17:52,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:17:52,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 76 conjunts are in the unsatisfiable core [2021-06-05 23:17:52,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:17:52,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 741 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:17:52,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663877497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:17:52,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:17:52,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 40 [2021-06-05 23:17:52,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642935661] [2021-06-05 23:17:52,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-05 23:17:52,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:17:52,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-05 23:17:52,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 23:17:52,230 INFO L87 Difference]: Start difference. First operand 201 states and 396 transitions. Second operand has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:52,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:17:52,404 INFO L93 Difference]: Finished difference Result 2768 states and 5410 transitions. [2021-06-05 23:17:52,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 23:17:52,405 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-06-05 23:17:52,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:17:52,408 INFO L225 Difference]: With dead ends: 2768 [2021-06-05 23:17:52,408 INFO L226 Difference]: Without dead ends: 2691 [2021-06-05 23:17:52,408 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 587.7ms TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 23:17:52,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2691 states. [2021-06-05 23:17:52,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2691 to 2463. [2021-06-05 23:17:52,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2463 states, 2462 states have (on average 2.0430544272948823) internal successors, (5030), 2462 states have internal predecessors, (5030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:52,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2463 states to 2463 states and 5030 transitions. [2021-06-05 23:17:52,433 INFO L78 Accepts]: Start accepts. Automaton has 2463 states and 5030 transitions. Word has length 84 [2021-06-05 23:17:52,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:17:52,433 INFO L482 AbstractCegarLoop]: Abstraction has 2463 states and 5030 transitions. [2021-06-05 23:17:52,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:17:52,433 INFO L276 IsEmpty]: Start isEmpty. Operand 2463 states and 5030 transitions. [2021-06-05 23:17:52,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-05 23:17:52,435 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:17:52,435 INFO L554 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:17:52,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:17:52,637 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:17:52,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:17:52,637 INFO L82 PathProgramCache]: Analyzing trace with hash 713966198, now seen corresponding path program 70 times [2021-06-05 23:17:52,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:17:52,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334395999] [2021-06-05 23:17:52,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:17:52,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:17:55,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:17:55,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:17:55,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334395999] [2021-06-05 23:17:55,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334395999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:17:55,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003447548] [2021-06-05 23:17:55,259 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:17:55,311 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:17:55,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:17:55,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 155 conjunts are in the unsatisfiable core [2021-06-05 23:17:55,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:17:55,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:17:55,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:17:55,466 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:17:55,466 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:17:55,466 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 23:17:55,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:17:55,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003447548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:17:55,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:17:55,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2021-06-05 23:17:55,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593045862] [2021-06-05 23:17:55,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 79 states [2021-06-05 23:17:55,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:17:55,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-06-05 23:17:55,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=6007, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 23:17:55,473 INFO L87 Difference]: Start difference. First operand 2463 states and 5030 transitions. Second operand has 79 states, 79 states have (on average 1.0759493670886076) internal successors, (85), 78 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:18:04,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:18:04,947 INFO L93 Difference]: Finished difference Result 4997 states and 9907 transitions. [2021-06-05 23:18:04,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-05 23:18:04,947 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.0759493670886076) internal successors, (85), 78 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-06-05 23:18:04,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:18:04,950 INFO L225 Difference]: With dead ends: 4997 [2021-06-05 23:18:04,950 INFO L226 Difference]: Without dead ends: 3207 [2021-06-05 23:18:04,951 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2850 ImplicationChecksByTransitivity, 9990.1ms TimeCoverageRelationStatistics Valid=3271, Invalid=20599, Unknown=0, NotChecked=0, Total=23870 [2021-06-05 23:18:04,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3207 states. [2021-06-05 23:18:04,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3207 to 206. [2021-06-05 23:18:04,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 1.9804878048780488) internal successors, (406), 205 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:18:04,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 406 transitions. [2021-06-05 23:18:04,960 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 406 transitions. Word has length 85 [2021-06-05 23:18:04,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:18:04,960 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 406 transitions. [2021-06-05 23:18:04,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 79 states, 79 states have (on average 1.0759493670886076) internal successors, (85), 78 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:18:04,960 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 406 transitions. [2021-06-05 23:18:04,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-06-05 23:18:04,960 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:18:04,960 INFO L554 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:18:05,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-06-05 23:18:05,161 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:18:05,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:18:05,161 INFO L82 PathProgramCache]: Analyzing trace with hash 681186359, now seen corresponding path program 71 times [2021-06-05 23:18:05,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:18:05,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095581171] [2021-06-05 23:18:05,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:18:05,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:18:05,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 780 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:18:05,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:18:05,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095581171] [2021-06-05 23:18:05,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095581171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:05,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932196182] [2021-06-05 23:18:05,846 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:18:05,927 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2021-06-05 23:18:05,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:18:05,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 78 conjunts are in the unsatisfiable core [2021-06-05 23:18:05,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:18:06,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 780 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:18:06,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932196182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:06,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:18:06,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40] total 41 [2021-06-05 23:18:06,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782725247] [2021-06-05 23:18:06,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-06-05 23:18:06,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:18:06,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-06-05 23:18:06,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 23:18:06,141 INFO L87 Difference]: Start difference. First operand 206 states and 406 transitions. Second operand has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:18:06,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:18:06,285 INFO L93 Difference]: Finished difference Result 2899 states and 5669 transitions. [2021-06-05 23:18:06,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 23:18:06,286 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-06-05 23:18:06,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:18:06,287 INFO L225 Difference]: With dead ends: 2899 [2021-06-05 23:18:06,288 INFO L226 Difference]: Without dead ends: 2820 [2021-06-05 23:18:06,288 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 629.3ms TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 23:18:06,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2820 states. [2021-06-05 23:18:06,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2820 to 2586. [2021-06-05 23:18:06,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2586 states, 2585 states have (on average 2.042166344294004) internal successors, (5279), 2585 states have internal predecessors, (5279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:18:06,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2586 states to 2586 states and 5279 transitions. [2021-06-05 23:18:06,305 INFO L78 Accepts]: Start accepts. Automaton has 2586 states and 5279 transitions. Word has length 86 [2021-06-05 23:18:06,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:18:06,305 INFO L482 AbstractCegarLoop]: Abstraction has 2586 states and 5279 transitions. [2021-06-05 23:18:06,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:18:06,305 INFO L276 IsEmpty]: Start isEmpty. Operand 2586 states and 5279 transitions. [2021-06-05 23:18:06,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-06-05 23:18:06,307 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:18:06,307 INFO L554 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:18:06,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:18:06,507 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:18:06,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:18:06,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1178547326, now seen corresponding path program 72 times [2021-06-05 23:18:06,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:18:06,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798839546] [2021-06-05 23:18:06,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:18:06,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:18:09,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:18:09,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:18:09,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798839546] [2021-06-05 23:18:09,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798839546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:09,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84544523] [2021-06-05 23:18:09,257 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:18:09,329 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2021-06-05 23:18:09,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:18:09,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 84 conjunts are in the unsatisfiable core [2021-06-05 23:18:09,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:18:17,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:18:17,296 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 11 treesize of output 7 [2021-06-05 23:18:17,297 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:18:17,301 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:18:17,302 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:18:17,302 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2021-06-05 23:18:17,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 741 proven. 819 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:18:17,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84544523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:18:17,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:18:17,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 158 [2021-06-05 23:18:17,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784768962] [2021-06-05 23:18:17,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 159 states [2021-06-05 23:18:17,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:18:17,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 159 interpolants. [2021-06-05 23:18:17,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3318, Invalid=21804, Unknown=0, NotChecked=0, Total=25122 [2021-06-05 23:18:17,309 INFO L87 Difference]: Start difference. First operand 2586 states and 5279 transitions. Second operand has 159 states, 159 states have (on average 1.0628930817610063) internal successors, (169), 158 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:18:21,726 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 105 [2021-06-05 23:18:22,002 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 109 [2021-06-05 23:18:22,284 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 113 [2021-06-05 23:18:22,648 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 117 [2021-06-05 23:18:22,946 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 121 [2021-06-05 23:18:23,256 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 125 [2021-06-05 23:18:23,586 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 129 [2021-06-05 23:18:23,906 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 128 [2021-06-05 23:18:24,241 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 137 [2021-06-05 23:18:24,586 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 141 [2021-06-05 23:18:24,941 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 145 [2021-06-05 23:18:25,312 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 149 [2021-06-05 23:18:25,677 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 148 [2021-06-05 23:18:26,062 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 152 [2021-06-05 23:18:26,464 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 156 [2021-06-05 23:18:26,858 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 160 [2021-06-05 23:18:27,152 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2021-06-05 23:18:27,453 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2021-06-05 23:18:27,742 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2021-06-05 23:18:28,170 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2021-06-05 23:18:28,794 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2021-06-05 23:18:31,275 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2021-06-05 23:22:32,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:22:32,265 INFO L93 Difference]: Finished difference Result 43429 states and 85946 transitions. [2021-06-05 23:22:32,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 940 states. [2021-06-05 23:22:32,266 INFO L78 Accepts]: Start accepts. Automaton has has 159 states, 159 states have (on average 1.0628930817610063) internal successors, (169), 158 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-06-05 23:22:32,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:22:32,299 INFO L225 Difference]: With dead ends: 43429 [2021-06-05 23:22:32,299 INFO L226 Difference]: Without dead ends: 35000 [2021-06-05 23:22:32,339 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 1064 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1055 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431709 ImplicationChecksByTransitivity, 245189.2ms TimeCoverageRelationStatistics Valid=188064, Invalid=928128, Unknown=0, NotChecked=0, Total=1116192 [2021-06-05 23:22:32,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35000 states. [2021-06-05 23:22:32,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35000 to 2630. [2021-06-05 23:22:32,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2630 states, 2629 states have (on average 2.0422213769494104) internal successors, (5369), 2629 states have internal predecessors, (5369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:22:32,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2630 states to 2630 states and 5369 transitions. [2021-06-05 23:22:32,477 INFO L78 Accepts]: Start accepts. Automaton has 2630 states and 5369 transitions. Word has length 87 [2021-06-05 23:22:32,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:22:32,477 INFO L482 AbstractCegarLoop]: Abstraction has 2630 states and 5369 transitions. [2021-06-05 23:22:32,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 159 states, 159 states have (on average 1.0628930817610063) internal successors, (169), 158 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:22:32,477 INFO L276 IsEmpty]: Start isEmpty. Operand 2630 states and 5369 transitions. [2021-06-05 23:22:32,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-06-05 23:22:32,479 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:22:32,479 INFO L554 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:22:32,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:22:32,680 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:22:32,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:22:32,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1645133110, now seen corresponding path program 73 times [2021-06-05 23:22:32,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:22:32,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277212510] [2021-06-05 23:22:32,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:22:32,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:22:35,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:22:35,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:22:35,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277212510] [2021-06-05 23:22:35,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277212510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:22:35,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358155666] [2021-06-05 23:22:35,701 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:22:35,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:22:35,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 163 conjunts are in the unsatisfiable core [2021-06-05 23:22:35,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:22:35,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:22:35,973 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:22:35,974 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:22:35,975 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:22:35,975 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 23:22:35,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:22:35,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358155666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:22:35,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:22:35,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2021-06-05 23:22:35,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952583214] [2021-06-05 23:22:35,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 83 states [2021-06-05 23:22:35,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:22:35,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-06-05 23:22:35,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=6643, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 23:22:35,982 INFO L87 Difference]: Start difference. First operand 2630 states and 5369 transitions. Second operand has 83 states, 83 states have (on average 1.072289156626506) internal successors, (89), 82 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:22:38,936 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-06-05 23:22:41,608 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2021-06-05 23:22:41,812 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2021-06-05 23:22:42,010 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-05 23:22:43,194 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2021-06-05 23:22:47,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:22:47,019 INFO L93 Difference]: Finished difference Result 5413 states and 10738 transitions. [2021-06-05 23:22:47,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 23:22:47,024 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.072289156626506) internal successors, (89), 82 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-06-05 23:22:47,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:22:47,026 INFO L225 Difference]: With dead ends: 5413 [2021-06-05 23:22:47,026 INFO L226 Difference]: Without dead ends: 3533 [2021-06-05 23:22:47,027 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 87 SyntacticMatches, 2 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3160 ImplicationChecksByTransitivity, 11713.2ms TimeCoverageRelationStatistics Valid=3603, Invalid=22803, Unknown=0, NotChecked=0, Total=26406 [2021-06-05 23:22:47,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3533 states. [2021-06-05 23:22:47,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3533 to 216. [2021-06-05 23:22:47,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.9813953488372094) internal successors, (426), 215 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:22:47,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 426 transitions. [2021-06-05 23:22:47,036 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 426 transitions. Word has length 89 [2021-06-05 23:22:47,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:22:47,036 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 426 transitions. [2021-06-05 23:22:47,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 83 states, 83 states have (on average 1.072289156626506) internal successors, (89), 82 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:22:47,036 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 426 transitions. [2021-06-05 23:22:47,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 23:22:47,037 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:22:47,037 INFO L554 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:22:47,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:22:47,237 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:22:47,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:22:47,237 INFO L82 PathProgramCache]: Analyzing trace with hash -517410441, now seen corresponding path program 74 times [2021-06-05 23:22:47,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:22:47,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11620003] [2021-06-05 23:22:47,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:22:47,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:22:47,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 861 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:22:47,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:22:47,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11620003] [2021-06-05 23:22:47,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11620003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:22:47,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064606013] [2021-06-05 23:22:47,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:22:48,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:22:48,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:22:48,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 82 conjunts are in the unsatisfiable core [2021-06-05 23:22:48,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:22:48,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 861 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:22:48,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064606013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:22:48,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:22:48,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 43 [2021-06-05 23:22:48,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127313122] [2021-06-05 23:22:48,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-06-05 23:22:48,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:22:48,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-06-05 23:22:48,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 23:22:48,232 INFO L87 Difference]: Start difference. First operand 216 states and 426 transitions. Second operand has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 43 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:22:48,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:22:48,382 INFO L93 Difference]: Finished difference Result 3170 states and 6205 transitions. [2021-06-05 23:22:48,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 23:22:48,383 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 43 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-06-05 23:22:48,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:22:48,385 INFO L225 Difference]: With dead ends: 3170 [2021-06-05 23:22:48,385 INFO L226 Difference]: Without dead ends: 3087 [2021-06-05 23:22:48,385 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 676.8ms TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 23:22:48,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3087 states. [2021-06-05 23:22:48,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3087 to 2841. [2021-06-05 23:22:48,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2841 states, 2840 states have (on average 2.040492957746479) internal successors, (5795), 2840 states have internal predecessors, (5795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:22:48,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2841 states to 2841 states and 5795 transitions. [2021-06-05 23:22:48,415 INFO L78 Accepts]: Start accepts. Automaton has 2841 states and 5795 transitions. Word has length 90 [2021-06-05 23:22:48,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:22:48,415 INFO L482 AbstractCegarLoop]: Abstraction has 2841 states and 5795 transitions. [2021-06-05 23:22:48,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 43 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:22:48,415 INFO L276 IsEmpty]: Start isEmpty. Operand 2841 states and 5795 transitions. [2021-06-05 23:22:48,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-06-05 23:22:48,418 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:22:48,418 INFO L554 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:22:48,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-06-05 23:22:48,641 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:22:48,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:22:48,642 INFO L82 PathProgramCache]: Analyzing trace with hash -2042819774, now seen corresponding path program 75 times [2021-06-05 23:22:48,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:22:48,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775559317] [2021-06-05 23:22:48,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:22:48,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:22:51,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:22:51,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:22:51,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775559317] [2021-06-05 23:22:51,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775559317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:22:51,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219538878] [2021-06-05 23:22:51,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:22:51,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-06-05 23:22:51,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:22:51,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 167 conjunts are in the unsatisfiable core [2021-06-05 23:22:51,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:22:52,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:22:52,083 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:22:52,084 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:22:52,084 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:22:52,084 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 23:22:52,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:22:52,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219538878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:22:52,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:22:52,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2021-06-05 23:22:52,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693027988] [2021-06-05 23:22:52,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 85 states [2021-06-05 23:22:52,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:22:52,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-06-05 23:22:52,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=6973, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 23:22:52,092 INFO L87 Difference]: Start difference. First operand 2841 states and 5795 transitions. Second operand has 85 states, 85 states have (on average 1.0705882352941176) internal successors, (91), 84 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:22:55,913 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-06-05 23:22:58,004 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2021-06-05 23:22:58,214 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2021-06-05 23:22:58,420 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2021-06-05 23:22:58,651 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-05 23:23:00,094 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2021-06-05 23:23:03,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:23:03,640 INFO L93 Difference]: Finished difference Result 5759 states and 11425 transitions. [2021-06-05 23:23:03,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-06-05 23:23:03,641 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.0705882352941176) internal successors, (91), 84 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-06-05 23:23:03,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:23:03,644 INFO L225 Difference]: With dead ends: 5759 [2021-06-05 23:23:03,644 INFO L226 Difference]: Without dead ends: 3705 [2021-06-05 23:23:03,645 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3321 ImplicationChecksByTransitivity, 12259.5ms TimeCoverageRelationStatistics Valid=3775, Invalid=23947, Unknown=0, NotChecked=0, Total=27722 [2021-06-05 23:23:03,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3705 states. [2021-06-05 23:23:03,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3705 to 221. [2021-06-05 23:23:03,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 1.981818181818182) internal successors, (436), 220 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:03,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 436 transitions. [2021-06-05 23:23:03,654 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 436 transitions. Word has length 91 [2021-06-05 23:23:03,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:23:03,654 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 436 transitions. [2021-06-05 23:23:03,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 85 states, 85 states have (on average 1.0705882352941176) internal successors, (91), 84 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:03,654 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 436 transitions. [2021-06-05 23:23:03,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-06-05 23:23:03,655 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:23:03,655 INFO L554 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:23:03,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:23:03,855 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:23:03,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:23:03,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1120167147, now seen corresponding path program 76 times [2021-06-05 23:23:03,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:23:03,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618294537] [2021-06-05 23:23:03,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:23:03,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:23:04,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 903 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:23:04,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:23:04,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618294537] [2021-06-05 23:23:04,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618294537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:23:04,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160752685] [2021-06-05 23:23:04,677 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:23:04,739 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:23:04,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:23:04,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 84 conjunts are in the unsatisfiable core [2021-06-05 23:23:04,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:23:04,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 903 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:23:04,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160752685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:23:04,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:23:04,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 44 [2021-06-05 23:23:04,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339875901] [2021-06-05 23:23:04,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-06-05 23:23:04,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:23:04,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-06-05 23:23:04,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 23:23:04,951 INFO L87 Difference]: Start difference. First operand 221 states and 436 transitions. Second operand has 45 states, 45 states have (on average 2.111111111111111) internal successors, (95), 44 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:05,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:23:05,148 INFO L93 Difference]: Finished difference Result 3310 states and 6482 transitions. [2021-06-05 23:23:05,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 23:23:05,148 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.111111111111111) internal successors, (95), 44 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-06-05 23:23:05,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:23:05,151 INFO L225 Difference]: With dead ends: 3310 [2021-06-05 23:23:05,152 INFO L226 Difference]: Without dead ends: 3225 [2021-06-05 23:23:05,152 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 705.5ms TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 23:23:05,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3225 states. [2021-06-05 23:23:05,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3225 to 2973. [2021-06-05 23:23:05,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2973 states, 2972 states have (on average 2.0397039030955586) internal successors, (6062), 2972 states have internal predecessors, (6062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:05,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2973 states to 2973 states and 6062 transitions. [2021-06-05 23:23:05,183 INFO L78 Accepts]: Start accepts. Automaton has 2973 states and 6062 transitions. Word has length 92 [2021-06-05 23:23:05,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:23:05,183 INFO L482 AbstractCegarLoop]: Abstraction has 2973 states and 6062 transitions. [2021-06-05 23:23:05,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 2.111111111111111) internal successors, (95), 44 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:05,183 INFO L276 IsEmpty]: Start isEmpty. Operand 2973 states and 6062 transitions. [2021-06-05 23:23:05,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-06-05 23:23:05,186 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:23:05,186 INFO L554 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:23:05,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:23:05,401 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:23:05,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:23:05,401 INFO L82 PathProgramCache]: Analyzing trace with hash -214353930, now seen corresponding path program 77 times [2021-06-05 23:23:05,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:23:05,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154157189] [2021-06-05 23:23:05,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:23:05,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:23:08,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:23:08,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:23:08,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154157189] [2021-06-05 23:23:08,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154157189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:23:08,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218745741] [2021-06-05 23:23:08,628 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:23:08,721 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2021-06-05 23:23:08,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:23:08,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 171 conjunts are in the unsatisfiable core [2021-06-05 23:23:08,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:23:08,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:23:08,914 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:23:08,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:23:08,916 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:23:08,916 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 23:23:08,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:23:08,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218745741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:23:08,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:23:08,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2021-06-05 23:23:08,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838952425] [2021-06-05 23:23:08,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 87 states [2021-06-05 23:23:08,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:23:08,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-06-05 23:23:08,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=7311, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 23:23:08,923 INFO L87 Difference]: Start difference. First operand 2973 states and 6062 transitions. Second operand has 87 states, 87 states have (on average 1.0689655172413792) internal successors, (93), 86 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:14,680 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2021-06-05 23:23:14,892 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2021-06-05 23:23:15,107 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2021-06-05 23:23:15,326 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2021-06-05 23:23:15,538 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2021-06-05 23:23:15,774 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2021-06-05 23:23:21,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:23:21,127 INFO L93 Difference]: Finished difference Result 6025 states and 11955 transitions. [2021-06-05 23:23:21,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-06-05 23:23:21,128 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.0689655172413792) internal successors, (93), 86 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-06-05 23:23:21,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:23:21,131 INFO L225 Difference]: With dead ends: 6025 [2021-06-05 23:23:21,131 INFO L226 Difference]: Without dead ends: 3879 [2021-06-05 23:23:21,131 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3486 ImplicationChecksByTransitivity, 12802.6ms TimeCoverageRelationStatistics Valid=3951, Invalid=25119, Unknown=0, NotChecked=0, Total=29070 [2021-06-05 23:23:21,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3879 states. [2021-06-05 23:23:21,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3879 to 226. [2021-06-05 23:23:21,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 1.9822222222222223) internal successors, (446), 225 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:21,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 446 transitions. [2021-06-05 23:23:21,141 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 446 transitions. Word has length 93 [2021-06-05 23:23:21,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:23:21,141 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 446 transitions. [2021-06-05 23:23:21,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 87 states, 87 states have (on average 1.0689655172413792) internal successors, (93), 86 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:21,141 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 446 transitions. [2021-06-05 23:23:21,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-06-05 23:23:21,141 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:23:21,141 INFO L554 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:23:21,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-06-05 23:23:21,342 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:23:21,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:23:21,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1968033463, now seen corresponding path program 78 times [2021-06-05 23:23:21,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:23:21,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511203490] [2021-06-05 23:23:21,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:23:21,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:23:22,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 946 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:23:22,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:23:22,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511203490] [2021-06-05 23:23:22,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511203490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:23:22,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40818448] [2021-06-05 23:23:22,121 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:23:22,200 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2021-06-05 23:23:22,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:23:22,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 86 conjunts are in the unsatisfiable core [2021-06-05 23:23:22,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:23:22,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 946 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:23:22,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40818448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:23:22,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:23:22,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44] total 45 [2021-06-05 23:23:22,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693847141] [2021-06-05 23:23:22,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-06-05 23:23:22,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:23:22,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-06-05 23:23:22,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 23:23:22,421 INFO L87 Difference]: Start difference. First operand 226 states and 446 transitions. Second operand has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:22,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:23:22,588 INFO L93 Difference]: Finished difference Result 3453 states and 6765 transitions. [2021-06-05 23:23:22,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 23:23:22,589 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-06-05 23:23:22,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:23:22,591 INFO L225 Difference]: With dead ends: 3453 [2021-06-05 23:23:22,591 INFO L226 Difference]: Without dead ends: 3366 [2021-06-05 23:23:22,591 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 732.5ms TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 23:23:22,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3366 states. [2021-06-05 23:23:22,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3366 to 3108. [2021-06-05 23:23:22,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3108 states, 3107 states have (on average 2.0389443192790475) internal successors, (6335), 3107 states have internal predecessors, (6335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:22,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3108 states to 3108 states and 6335 transitions. [2021-06-05 23:23:22,614 INFO L78 Accepts]: Start accepts. Automaton has 3108 states and 6335 transitions. Word has length 94 [2021-06-05 23:23:22,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:23:22,614 INFO L482 AbstractCegarLoop]: Abstraction has 3108 states and 6335 transitions. [2021-06-05 23:23:22,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:22,614 INFO L276 IsEmpty]: Start isEmpty. Operand 3108 states and 6335 transitions. [2021-06-05 23:23:22,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-05 23:23:22,616 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:23:22,616 INFO L554 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:23:22,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-05 23:23:22,817 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:23:22,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:23:22,817 INFO L82 PathProgramCache]: Analyzing trace with hash -606467326, now seen corresponding path program 79 times [2021-06-05 23:23:22,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:23:22,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799794229] [2021-06-05 23:23:22,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:23:22,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:23:26,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:23:26,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:23:26,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799794229] [2021-06-05 23:23:26,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799794229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:23:26,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716892178] [2021-06-05 23:23:26,180 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:23:26,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:23:26,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 175 conjunts are in the unsatisfiable core [2021-06-05 23:23:26,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:23:26,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:23:26,410 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:23:26,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:23:26,412 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:23:26,412 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 23:23:26,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:23:26,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716892178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:23:26,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:23:26,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2021-06-05 23:23:26,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978739113] [2021-06-05 23:23:26,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 89 states [2021-06-05 23:23:26,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:23:26,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-06-05 23:23:26,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=7657, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 23:23:26,418 INFO L87 Difference]: Start difference. First operand 3108 states and 6335 transitions. Second operand has 89 states, 89 states have (on average 1.0674157303370786) internal successors, (95), 88 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:32,316 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2021-06-05 23:23:32,533 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2021-06-05 23:23:32,753 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2021-06-05 23:23:32,976 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2021-06-05 23:23:33,205 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2021-06-05 23:23:33,427 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2021-06-05 23:23:33,674 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2021-06-05 23:23:33,844 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2021-06-05 23:23:34,012 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-05 23:23:39,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:23:39,307 INFO L93 Difference]: Finished difference Result 6297 states and 12497 transitions. [2021-06-05 23:23:39,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-06-05 23:23:39,307 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 1.0674157303370786) internal successors, (95), 88 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-06-05 23:23:39,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:23:39,311 INFO L225 Difference]: With dead ends: 6297 [2021-06-05 23:23:39,311 INFO L226 Difference]: Without dead ends: 4057 [2021-06-05 23:23:39,312 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3655 ImplicationChecksByTransitivity, 13533.1ms TimeCoverageRelationStatistics Valid=4131, Invalid=26319, Unknown=0, NotChecked=0, Total=30450 [2021-06-05 23:23:39,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4057 states. [2021-06-05 23:23:39,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4057 to 231. [2021-06-05 23:23:39,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 1.982608695652174) internal successors, (456), 230 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:39,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 456 transitions. [2021-06-05 23:23:39,321 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 456 transitions. Word has length 95 [2021-06-05 23:23:39,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:23:39,322 INFO L482 AbstractCegarLoop]: Abstraction has 231 states and 456 transitions. [2021-06-05 23:23:39,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 89 states, 89 states have (on average 1.0674157303370786) internal successors, (95), 88 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:39,322 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 456 transitions. [2021-06-05 23:23:39,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-05 23:23:39,322 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:23:39,322 INFO L554 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:23:39,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:23:39,523 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:23:39,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:23:39,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1597547221, now seen corresponding path program 80 times [2021-06-05 23:23:39,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:23:39,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764649225] [2021-06-05 23:23:39,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:23:39,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:23:40,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 990 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:23:40,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:23:40,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764649225] [2021-06-05 23:23:40,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764649225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:23:40,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649251123] [2021-06-05 23:23:40,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:23:40,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:23:40,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:23:40,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 88 conjunts are in the unsatisfiable core [2021-06-05 23:23:40,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:23:40,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 990 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:23:40,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649251123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:23:40,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:23:40,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45] total 46 [2021-06-05 23:23:40,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236614231] [2021-06-05 23:23:40,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-06-05 23:23:40,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:23:40,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-06-05 23:23:40,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:23:40,577 INFO L87 Difference]: Start difference. First operand 231 states and 456 transitions. Second operand has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:40,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:23:40,759 INFO L93 Difference]: Finished difference Result 3599 states and 7054 transitions. [2021-06-05 23:23:40,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 23:23:40,759 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-06-05 23:23:40,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:23:40,762 INFO L225 Difference]: With dead ends: 3599 [2021-06-05 23:23:40,762 INFO L226 Difference]: Without dead ends: 3510 [2021-06-05 23:23:40,762 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 761.7ms TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:23:40,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3510 states. [2021-06-05 23:23:40,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3510 to 3246. [2021-06-05 23:23:40,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3246 states, 3245 states have (on average 2.0382126348228042) internal successors, (6614), 3245 states have internal predecessors, (6614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:40,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3246 states to 3246 states and 6614 transitions. [2021-06-05 23:23:40,785 INFO L78 Accepts]: Start accepts. Automaton has 3246 states and 6614 transitions. Word has length 96 [2021-06-05 23:23:40,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:23:40,785 INFO L482 AbstractCegarLoop]: Abstraction has 3246 states and 6614 transitions. [2021-06-05 23:23:40,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 2.106382978723404) internal successors, (99), 46 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:40,785 INFO L276 IsEmpty]: Start isEmpty. Operand 3246 states and 6614 transitions. [2021-06-05 23:23:40,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-06-05 23:23:40,787 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:23:40,787 INFO L554 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:23:40,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:23:40,988 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:23:40,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:23:40,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1791642954, now seen corresponding path program 81 times [2021-06-05 23:23:40,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:23:40,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448504803] [2021-06-05 23:23:40,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:23:41,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:23:44,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:23:44,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:23:44,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448504803] [2021-06-05 23:23:44,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448504803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:23:44,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868671129] [2021-06-05 23:23:44,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:23:44,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2021-06-05 23:23:44,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:23:44,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 94 conjunts are in the unsatisfiable core [2021-06-05 23:23:44,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:23:54,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:23:54,965 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 11 treesize of output 7 [2021-06-05 23:23:54,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:23:54,969 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:23:54,970 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:23:54,970 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2021-06-05 23:23:54,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 946 proven. 1034 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:23:54,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868671129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:23:54,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:23:54,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 178 [2021-06-05 23:23:54,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528282195] [2021-06-05 23:23:54,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 179 states [2021-06-05 23:23:54,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:23:54,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 179 interpolants. [2021-06-05 23:23:54,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4183, Invalid=27679, Unknown=0, NotChecked=0, Total=31862 [2021-06-05 23:23:54,977 INFO L87 Difference]: Start difference. First operand 3246 states and 6614 transitions. Second operand has 179 states, 179 states have (on average 1.0558659217877095) internal successors, (189), 178 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:23:59,426 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 105 [2021-06-05 23:23:59,698 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 109 [2021-06-05 23:23:59,973 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 113 [2021-06-05 23:24:00,257 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 112 [2021-06-05 23:24:00,547 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 121 [2021-06-05 23:24:00,846 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 120 [2021-06-05 23:24:01,151 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 129 [2021-06-05 23:24:01,481 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 128 [2021-06-05 23:24:01,833 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 137 [2021-06-05 23:24:02,175 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 141 [2021-06-05 23:24:02,516 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 145 [2021-06-05 23:24:02,868 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 144 [2021-06-05 23:24:03,228 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 148 [2021-06-05 23:24:03,622 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 157 [2021-06-05 23:24:04,003 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 156 [2021-06-05 23:24:04,396 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 160 [2021-06-05 23:24:04,796 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 164 [2021-06-05 23:24:05,223 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 173 [2021-06-05 23:24:05,655 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 177 [2021-06-05 23:24:06,093 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 176 [2021-06-05 23:24:06,555 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 180 [2021-06-05 23:24:06,884 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2021-06-05 23:24:07,204 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2021-06-05 23:24:07,517 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2021-06-05 23:24:07,768 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2021-06-05 23:24:08,045 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2021-06-05 23:24:08,301 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2021-06-05 23:24:08,541 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2021-06-05 23:24:08,810 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2021-06-05 23:24:09,069 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2021-06-05 23:24:09,307 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2021-06-05 23:24:09,572 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2021-06-05 23:24:09,833 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2021-06-05 23:24:10,092 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2021-06-05 23:24:10,331 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-05 23:24:10,594 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2021-06-05 23:24:10,841 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2021-06-05 23:24:11,092 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2021-06-05 23:24:11,609 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2021-06-05 23:24:11,864 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2021-06-05 23:24:12,107 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2021-06-05 23:24:12,350 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2021-06-05 23:24:12,849 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2021-06-05 23:24:13,097 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2021-06-05 23:24:13,335 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2021-06-05 23:24:13,578 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2021-06-05 23:24:14,082 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2021-06-05 23:24:14,341 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2021-06-05 23:24:14,586 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2021-06-05 23:24:14,818 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2021-06-05 23:24:15,559 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2021-06-05 23:24:15,827 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2021-06-05 23:24:16,067 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2021-06-05 23:24:17,040 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2021-06-05 23:24:17,306 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2021-06-05 23:24:17,556 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2021-06-05 23:24:18,743 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2021-06-05 23:24:19,002 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2021-06-05 23:24:20,445 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2021-06-05 23:24:20,718 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2021-06-05 23:24:22,393 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2021-06-05 23:24:24,294 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2021-06-05 23:24:24,856 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2021-06-05 23:24:29,403 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2021-06-05 23:24:33,868 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2021-06-05 23:24:38,418 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2021-06-05 23:26:07,420 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-06-05 23:26:26,534 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 82 Received shutdown request... [2021-06-05 23:26:44,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 691 states. [2021-06-05 23:26:44,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:26:44,871 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 23:26:44,873 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 23:26:44,874 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 23:26:44,874 INFO L202 PluginConnector]: Adding new model simple-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 11:26:44 BasicIcfg [2021-06-05 23:26:44,874 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 23:26:44,875 INFO L168 Benchmark]: Toolchain (without parser) took 764293.38 ms. Allocated memory was 346.0 MB in the beginning and 1.8 GB in the end (delta: 1.5 GB). Free memory was 327.1 MB in the beginning and 588.5 MB in the end (delta: -261.3 MB). Peak memory consumption was 1.2 GB. Max. memory is 16.0 GB. [2021-06-05 23:26:44,875 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 346.0 MB. Free memory is still 328.2 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 23:26:44,875 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.83 ms. Allocated memory is still 346.0 MB. Free memory was 327.0 MB in the beginning and 325.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 23:26:44,875 INFO L168 Benchmark]: Boogie Preprocessor took 15.21 ms. Allocated memory is still 346.0 MB. Free memory was 325.6 MB in the beginning and 324.7 MB in the end (delta: 882.0 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 23:26:44,875 INFO L168 Benchmark]: RCFGBuilder took 241.38 ms. Allocated memory is still 346.0 MB. Free memory was 324.6 MB in the beginning and 313.6 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-06-05 23:26:44,875 INFO L168 Benchmark]: TraceAbstraction took 764011.21 ms. Allocated memory was 346.0 MB in the beginning and 1.8 GB in the end (delta: 1.5 GB). Free memory was 313.1 MB in the beginning and 588.5 MB in the end (delta: -275.3 MB). Peak memory consumption was 1.2 GB. Max. memory is 16.0 GB. [2021-06-05 23:26:44,876 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 346.0 MB. Free memory is still 328.2 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 20.83 ms. Allocated memory is still 346.0 MB. Free memory was 327.0 MB in the beginning and 325.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 15.21 ms. Allocated memory is still 346.0 MB. Free memory was 325.6 MB in the beginning and 324.7 MB in the end (delta: 882.0 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 241.38 ms. Allocated memory is still 346.0 MB. Free memory was 324.6 MB in the beginning and 313.6 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 764011.21 ms. Allocated memory was 346.0 MB in the beginning and 1.8 GB in the end (delta: 1.5 GB). Free memory was 313.1 MB in the beginning and 588.5 MB in the end (delta: -275.3 MB). Peak memory consumption was 1.2 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 46]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (3246states) and FLOYD_HOARE automaton (currently 691 states, 179 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 866 known predicates. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 20 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 763943.2ms, OverallIterations: 83, TraceHistogramMax: 44, EmptinessCheckTime: 87.6ms, AutomataDifference: 636124.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 15.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 9408 SDtfs, 129823 SDslu, 339525 SDs, 0 SdLazy, 95977 SolverSat, 41242 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 47630.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12125 GetRequests, 4909 SyntacticMatches, 72 SemanticMatches, 7143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818136 ImplicationChecksByTransitivity, 649866.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=3246occurred in iteration=82, InterpolantAutomatonStates: 4418, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1025.1ms AutomataMinimizationTime, 82 MinimizatonAttempts, 99360 StatesRemovedByMinimization, 79 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 551.5ms SsaConstructionTime, 2934.9ms SatisfiabilityAnalysisTime, 104106.5ms InterpolantComputationTime, 8911 NumberOfCodeBlocks, 8911 NumberOfCodeBlocksAsserted, 659 NumberOfCheckSat, 8747 ConstructedInterpolants, 154 QuantifiedInterpolants, 56579 SizeOfPredicates, 51 NumberOfNonLiveVariables, 18527 ConjunctsInSsa, 5607 ConjunctsInUnsatCore, 164 InterpolantComputations, 2 PerfectInterpolantSequences, 29773/114327 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