/usr/bin/java -Xmx8000000000 -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/chl/simpl-str-subst.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-12 20:18:17,302 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-12 20:18:17,305 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-12 20:18:17,343 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-12 20:18:17,344 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-12 20:18:17,347 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-12 20:18:17,353 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-12 20:18:17,358 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-12 20:18:17,360 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-12 20:18:17,364 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-12 20:18:17,365 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-12 20:18:17,366 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-12 20:18:17,366 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-12 20:18:17,368 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-12 20:18:17,370 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-12 20:18:17,371 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-12 20:18:17,373 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-12 20:18:17,374 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-12 20:18:17,376 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-12 20:18:17,383 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-12 20:18:17,384 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-12 20:18:17,395 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-12 20:18:17,396 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-12 20:18:17,397 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-12 20:18:17,401 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-06-12 20:18:17,401 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-06-12 20:18:17,401 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-06-12 20:18:17,402 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-06-12 20:18:17,402 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-06-12 20:18:17,403 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-06-12 20:18:17,403 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-06-12 20:18:17,404 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-06-12 20:18:17,404 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-06-12 20:18:17,405 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-06-12 20:18:17,406 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-06-12 20:18:17,406 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-06-12 20:18:17,406 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-06-12 20:18:17,407 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-06-12 20:18:17,407 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-12 20:18:17,408 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-12 20:18:17,408 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-12 20:18:17,415 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 [2021-06-12 20:18:17,453 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-12 20:18:17,453 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-12 20:18:17,454 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-12 20:18:17,454 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-12 20:18:17,456 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-12 20:18:17,457 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-12 20:18:17,457 INFO L138 SettingsManager]: * Use SBE=true [2021-06-12 20:18:17,457 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-12 20:18:17,457 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-12 20:18:17,457 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-12 20:18:17,458 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-12 20:18:17,458 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-12 20:18:17,458 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-12 20:18:17,458 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-12 20:18:17,459 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-12 20:18:17,459 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-12 20:18:17,459 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-12 20:18:17,459 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-12 20:18:17,459 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-12 20:18:17,459 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-12 20:18:17,459 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-12 20:18:17,460 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-12 20:18:17,460 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-12 20:18:17,460 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 20:18:17,460 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-12 20:18:17,460 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-12 20:18:17,460 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-12 20:18:17,460 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-12 20:18:17,460 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-12 20:18:17,461 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-12 20:18:17,461 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-12 20:18:17,461 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-12 20:18:17,769 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-12 20:18:17,784 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-12 20:18:17,786 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-12 20:18:17,787 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-12 20:18:17,788 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-12 20:18:17,789 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/simpl-str-subst.wvr.bpl [2021-06-12 20:18:17,789 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/simpl-str-subst.wvr.bpl' [2021-06-12 20:18:17,831 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-12 20:18:17,832 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-12 20:18:17,833 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-12 20:18:17,833 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-12 20:18:17,833 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-12 20:18:17,842 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "simpl-str-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:18:17" (1/1) ... [2021-06-12 20:18:17,848 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "simpl-str-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:18:17" (1/1) ... [2021-06-12 20:18:17,854 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-12 20:18:17,855 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-12 20:18:17,855 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-12 20:18:17,855 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-12 20:18:17,860 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "simpl-str-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:18:17" (1/1) ... [2021-06-12 20:18:17,861 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "simpl-str-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:18:17" (1/1) ... [2021-06-12 20:18:17,861 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "simpl-str-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:18:17" (1/1) ... [2021-06-12 20:18:17,861 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "simpl-str-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:18:17" (1/1) ... [2021-06-12 20:18:17,863 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "simpl-str-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:18:17" (1/1) ... [2021-06-12 20:18:17,863 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "simpl-str-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:18:17" (1/1) ... [2021-06-12 20:18:17,864 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "simpl-str-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:18:17" (1/1) ... [2021-06-12 20:18:17,865 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-12 20:18:17,866 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-12 20:18:17,866 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-12 20:18:17,866 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-12 20:18:17,867 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "simpl-str-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:18:17" (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 [2021-06-12 20:18:17,926 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-12 20:18:17,926 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-12 20:18:17,926 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-12 20:18:17,926 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-12 20:18:17,927 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-12 20:18:17,927 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-12 20:18:17,927 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-12 20:18:17,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-12 20:18:17,927 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-12 20:18:17,927 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-12 20:18:17,928 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-12 20:18:17,928 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-12 20:18:17,929 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-12 20:18:18,060 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-12 20:18:18,060 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-12 20:18:18,061 INFO L202 PluginConnector]: Adding new model simpl-str-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 08:18:18 BoogieIcfgContainer [2021-06-12 20:18:18,061 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-12 20:18:18,063 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-12 20:18:18,063 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-12 20:18:18,066 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-12 20:18:18,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simpl-str-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:18:17" (1/2) ... [2021-06-12 20:18:18,067 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2103114f and model type simpl-str-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 08:18:18, skipping insertion in model container [2021-06-12 20:18:18,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simpl-str-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 08:18:18" (2/2) ... [2021-06-12 20:18:18,068 INFO L111 eAbstractionObserver]: Analyzing ICFG simpl-str-subst.wvr.bpl [2021-06-12 20:18:18,073 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-12 20:18:18,073 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-12 20:18:18,073 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-12 20:18:18,074 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-12 20:18:18,109 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-12 20:18:18,128 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-12 20:18:18,144 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 20:18:18,144 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 20:18:18,144 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 20:18:18,144 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 20:18:18,144 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 20:18:18,144 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 20:18:18,145 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 20:18:18,145 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-12 20:18:18,152 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 29 places, 19 transitions, 62 flow [2021-06-12 20:18:18,164 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 57 states, 55 states have (on average 2.036363636363636) internal successors, (112), 56 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:18,166 INFO L276 IsEmpty]: Start isEmpty. Operand has 57 states, 55 states have (on average 2.036363636363636) internal successors, (112), 56 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:18,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 20:18:18,172 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:18:18,173 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:18:18,173 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:18:18,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:18:18,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1166046104, now seen corresponding path program 1 times [2021-06-12 20:18:18,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:18:18,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758532414] [2021-06-12 20:18:18,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:18:18,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:18:18,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:18:18,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:18:18,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758532414] [2021-06-12 20:18:18,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758532414] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:18:18,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:18:18,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 20:18:18,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239539677] [2021-06-12 20:18:18,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:18:18,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:18:18,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:18:18,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:18:18,881 INFO L87 Difference]: Start difference. First operand has 57 states, 55 states have (on average 2.036363636363636) internal successors, (112), 56 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:19,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:18:19,118 INFO L93 Difference]: Finished difference Result 98 states and 183 transitions. [2021-06-12 20:18:19,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:18:19,120 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:18:19,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:18:19,131 INFO L225 Difference]: With dead ends: 98 [2021-06-12 20:18:19,131 INFO L226 Difference]: Without dead ends: 72 [2021-06-12 20:18:19,133 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 372.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:18:19,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-06-12 20:18:19,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 55. [2021-06-12 20:18:19,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.9444444444444444) internal successors, (105), 54 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:19,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 105 transitions. [2021-06-12 20:18:19,175 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 105 transitions. Word has length 14 [2021-06-12 20:18:19,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:18:19,175 INFO L482 AbstractCegarLoop]: Abstraction has 55 states and 105 transitions. [2021-06-12 20:18:19,176 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:19,176 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 105 transitions. [2021-06-12 20:18:19,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 20:18:19,177 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:18:19,177 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:18:19,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-12 20:18:19,178 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:18:19,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:18:19,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1802957416, now seen corresponding path program 2 times [2021-06-12 20:18:19,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:18:19,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369776169] [2021-06-12 20:18:19,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:18:19,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:18:19,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:18:19,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:18:19,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369776169] [2021-06-12 20:18:19,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369776169] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:18:19,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:18:19,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 20:18:19,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353032162] [2021-06-12 20:18:19,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:18:19,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:18:19,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:18:19,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:18:19,616 INFO L87 Difference]: Start difference. First operand 55 states and 105 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:19,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:18:19,801 INFO L93 Difference]: Finished difference Result 93 states and 168 transitions. [2021-06-12 20:18:19,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:18:19,802 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:18:19,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:18:19,803 INFO L225 Difference]: With dead ends: 93 [2021-06-12 20:18:19,803 INFO L226 Difference]: Without dead ends: 65 [2021-06-12 20:18:19,804 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 347.0ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:18:19,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-06-12 20:18:19,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 48. [2021-06-12 20:18:19,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 47 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) [2021-06-12 20:18:19,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 91 transitions. [2021-06-12 20:18:19,819 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 91 transitions. Word has length 14 [2021-06-12 20:18:19,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:18:19,819 INFO L482 AbstractCegarLoop]: Abstraction has 48 states and 91 transitions. [2021-06-12 20:18:19,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:19,820 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 91 transitions. [2021-06-12 20:18:19,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 20:18:19,822 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:18:19,822 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:18:19,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-12 20:18:19,822 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:18:19,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:18:19,823 INFO L82 PathProgramCache]: Analyzing trace with hash 2138675608, now seen corresponding path program 3 times [2021-06-12 20:18:19,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:18:19,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844580934] [2021-06-12 20:18:19,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:18:19,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:18:20,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:18:20,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:18:20,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844580934] [2021-06-12 20:18:20,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844580934] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:18:20,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:18:20,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 20:18:20,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644791770] [2021-06-12 20:18:20,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:18:20,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:18:20,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:18:20,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:18:20,211 INFO L87 Difference]: Start difference. First operand 48 states and 91 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:20,417 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-06-12 20:18:20,644 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-06-12 20:18:20,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:18:20,651 INFO L93 Difference]: Finished difference Result 80 states and 141 transitions. [2021-06-12 20:18:20,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:18:20,653 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:18:20,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:18:20,653 INFO L225 Difference]: With dead ends: 80 [2021-06-12 20:18:20,653 INFO L226 Difference]: Without dead ends: 54 [2021-06-12 20:18:20,654 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 656.5ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:18:20,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-06-12 20:18:20,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 37. [2021-06-12 20:18:20,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 36 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:20,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 64 transitions. [2021-06-12 20:18:20,657 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 64 transitions. Word has length 14 [2021-06-12 20:18:20,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:18:20,657 INFO L482 AbstractCegarLoop]: Abstraction has 37 states and 64 transitions. [2021-06-12 20:18:20,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:20,657 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 64 transitions. [2021-06-12 20:18:20,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 20:18:20,657 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:18:20,658 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:18:20,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-12 20:18:20,658 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:18:20,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:18:20,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1206578362, now seen corresponding path program 4 times [2021-06-12 20:18:20,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:18:20,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555782925] [2021-06-12 20:18:20,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:18:20,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:18:20,925 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 29 [2021-06-12 20:18:20,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:18:20,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:18:20,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555782925] [2021-06-12 20:18:20,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555782925] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:18:20,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:18:20,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 20:18:20,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346087680] [2021-06-12 20:18:20,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:18:20,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:18:20,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:18:20,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:18:20,977 INFO L87 Difference]: Start difference. First operand 37 states and 64 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:21,122 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-06-12 20:18:21,287 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2021-06-12 20:18:21,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:18:21,295 INFO L93 Difference]: Finished difference Result 56 states and 96 transitions. [2021-06-12 20:18:21,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:18:21,296 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:18:21,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:18:21,296 INFO L225 Difference]: With dead ends: 56 [2021-06-12 20:18:21,296 INFO L226 Difference]: Without dead ends: 33 [2021-06-12 20:18:21,297 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 534.8ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:18:21,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-06-12 20:18:21,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-06-12 20:18:21,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.75) internal successors, (56), 32 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:21,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 56 transitions. [2021-06-12 20:18:21,299 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 56 transitions. Word has length 14 [2021-06-12 20:18:21,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:18:21,299 INFO L482 AbstractCegarLoop]: Abstraction has 33 states and 56 transitions. [2021-06-12 20:18:21,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:21,300 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 56 transitions. [2021-06-12 20:18:21,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 20:18:21,300 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:18:21,300 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:18:21,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-12 20:18:21,301 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:18:21,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:18:21,301 INFO L82 PathProgramCache]: Analyzing trace with hash 531109562, now seen corresponding path program 5 times [2021-06-12 20:18:21,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:18:21,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892630151] [2021-06-12 20:18:21,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:18:21,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:18:21,570 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-06-12 20:18:21,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:18:21,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:18:21,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892630151] [2021-06-12 20:18:21,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892630151] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:18:21,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:18:21,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 20:18:21,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384593189] [2021-06-12 20:18:21,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:18:21,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:18:21,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:18:21,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:18:21,637 INFO L87 Difference]: Start difference. First operand 33 states and 56 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:21,919 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2021-06-12 20:18:22,272 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2021-06-12 20:18:22,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:18:22,279 INFO L93 Difference]: Finished difference Result 48 states and 80 transitions. [2021-06-12 20:18:22,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:18:22,280 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:18:22,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:18:22,281 INFO L225 Difference]: With dead ends: 48 [2021-06-12 20:18:22,282 INFO L226 Difference]: Without dead ends: 27 [2021-06-12 20:18:22,282 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 879.8ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:18:22,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-06-12 20:18:22,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-06-12 20:18:22,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 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) [2021-06-12 20:18:22,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 41 transitions. [2021-06-12 20:18:22,287 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 41 transitions. Word has length 14 [2021-06-12 20:18:22,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:18:22,288 INFO L482 AbstractCegarLoop]: Abstraction has 27 states and 41 transitions. [2021-06-12 20:18:22,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:22,288 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 41 transitions. [2021-06-12 20:18:22,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 20:18:22,289 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:18:22,289 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:18:22,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-12 20:18:22,289 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:18:22,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:18:22,290 INFO L82 PathProgramCache]: Analyzing trace with hash 202726680, now seen corresponding path program 6 times [2021-06-12 20:18:22,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:18:22,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233227472] [2021-06-12 20:18:22,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:18:22,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:18:22,580 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 30 [2021-06-12 20:18:22,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:18:22,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:18:22,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233227472] [2021-06-12 20:18:22,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233227472] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:18:22,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:18:22,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 20:18:22,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956748994] [2021-06-12 20:18:22,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:18:22,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:18:22,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:18:22,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:18:22,626 INFO L87 Difference]: Start difference. First operand 27 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:22,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:18:22,816 INFO L93 Difference]: Finished difference Result 25 states and 39 transitions. [2021-06-12 20:18:22,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:18:22,816 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have 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 [2021-06-12 20:18:22,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:18:22,817 INFO L225 Difference]: With dead ends: 25 [2021-06-12 20:18:22,817 INFO L226 Difference]: Without dead ends: 0 [2021-06-12 20:18:22,817 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 377.2ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:18:22,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-12 20:18:22,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-12 20:18:22,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:22,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-12 20:18:22,818 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2021-06-12 20:18:22,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:18:22,818 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-12 20:18:22,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:18:22,818 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-12 20:18:22,818 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-12 20:18:22,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-12 20:18:22,820 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-12 20:18:22,822 INFO L202 PluginConnector]: Adding new model simpl-str-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.06 08:18:22 BasicIcfg [2021-06-12 20:18:22,822 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-12 20:18:22,823 INFO L168 Benchmark]: Toolchain (without parser) took 4990.82 ms. Allocated memory was 254.8 MB in the beginning and 328.2 MB in the end (delta: 73.4 MB). Free memory was 236.0 MB in the beginning and 230.3 MB in the end (delta: 5.7 MB). Peak memory consumption was 79.1 MB. Max. memory is 8.0 GB. [2021-06-12 20:18:22,824 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 254.8 MB. Free memory is still 237.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-12 20:18:22,824 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.45 ms. Allocated memory is still 254.8 MB. Free memory was 235.9 MB in the beginning and 234.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-12 20:18:22,824 INFO L168 Benchmark]: Boogie Preprocessor took 9.67 ms. Allocated memory is still 254.8 MB. Free memory was 234.4 MB in the beginning and 233.5 MB in the end (delta: 845.1 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-12 20:18:22,825 INFO L168 Benchmark]: RCFGBuilder took 195.83 ms. Allocated memory is still 254.8 MB. Free memory was 233.4 MB in the beginning and 223.4 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-06-12 20:18:22,825 INFO L168 Benchmark]: TraceAbstraction took 4759.57 ms. Allocated memory was 254.8 MB in the beginning and 328.2 MB in the end (delta: 73.4 MB). Free memory was 222.9 MB in the beginning and 230.3 MB in the end (delta: -7.3 MB). Peak memory consumption was 66.5 MB. Max. memory is 8.0 GB. [2021-06-12 20:18:22,827 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 254.8 MB. Free memory is still 237.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 21.45 ms. Allocated memory is still 254.8 MB. Free memory was 235.9 MB in the beginning and 234.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 9.67 ms. Allocated memory is still 254.8 MB. Free memory was 234.4 MB in the beginning and 233.5 MB in the end (delta: 845.1 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 195.83 ms. Allocated memory is still 254.8 MB. Free memory was 233.4 MB in the beginning and 223.4 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4759.57 ms. Allocated memory was 254.8 MB in the beginning and 328.2 MB in the end (delta: 73.4 MB). Free memory was 222.9 MB in the beginning and 230.3 MB in the end (delta: -7.3 MB). Peak memory consumption was 66.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 47]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 32 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4677.2ms, OverallIterations: 6, TraceHistogramMax: 1, EmptinessCheckTime: 12.0ms, AutomataDifference: 2068.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 19.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 119 SDtfs, 147 SDslu, 177 SDs, 0 SdLazy, 80 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 86.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3167.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=57occurred in iteration=0, InterpolantAutomatonStates: 30, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 57.5ms AutomataMinimizationTime, 6 MinimizatonAttempts, 51 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 15.6ms SsaConstructionTime, 114.2ms SatisfiabilityAnalysisTime, 2257.7ms InterpolantComputationTime, 84 NumberOfCodeBlocks, 84 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 78 ConstructedInterpolants, 0 QuantifiedInterpolants, 2198 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 0/0 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...