/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/parallel/misc-4.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-10 22:29:02,704 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-10 22:29:02,706 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-10 22:29:02,738 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-10 22:29:02,738 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-10 22:29:02,741 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-10 22:29:02,743 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-10 22:29:02,747 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-10 22:29:02,749 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-10 22:29:02,752 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-10 22:29:02,753 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-10 22:29:02,754 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-10 22:29:02,754 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-10 22:29:02,756 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-10 22:29:02,757 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-10 22:29:02,758 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-10 22:29:02,760 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-10 22:29:02,760 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-10 22:29:02,762 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-10 22:29:02,768 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-10 22:29:02,769 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-10 22:29:02,770 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-10 22:29:02,771 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-10 22:29:02,772 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-10 22:29:02,777 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-03-10 22:29:02,778 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-03-10 22:29:02,778 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-03-10 22:29:02,779 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-03-10 22:29:02,779 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-03-10 22:29:02,780 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-03-10 22:29:02,780 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-03-10 22:29:02,781 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-03-10 22:29:02,782 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-03-10 22:29:02,782 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-03-10 22:29:02,783 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-03-10 22:29:02,783 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-03-10 22:29:02,784 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-03-10 22:29:02,784 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-03-10 22:29:02,784 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-10 22:29:02,784 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-10 22:29:02,785 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-10 22:29:02,788 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 [2021-03-10 22:29:02,818 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-10 22:29:02,818 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-10 22:29:02,819 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-10 22:29:02,819 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-10 22:29:02,821 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-10 22:29:02,822 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-10 22:29:02,822 INFO L138 SettingsManager]: * Use SBE=true [2021-03-10 22:29:02,822 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-10 22:29:02,822 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-10 22:29:02,822 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-10 22:29:02,823 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-10 22:29:02,823 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-10 22:29:02,823 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-10 22:29:02,823 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-10 22:29:02,823 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-10 22:29:02,824 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-10 22:29:02,824 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-10 22:29:02,824 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-10 22:29:02,824 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-10 22:29:02,824 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-10 22:29:02,824 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-10 22:29:02,824 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-10 22:29:02,824 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-10 22:29:02,824 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 22:29:02,825 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-10 22:29:02,825 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-10 22:29:02,825 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-10 22:29:02,825 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-10 22:29:02,825 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-10 22:29:02,825 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-10 22:29:02,825 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-10 22:29:02,825 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-10 22:29:03,094 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-10 22:29:03,112 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-10 22:29:03,115 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-10 22:29:03,115 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-10 22:29:03,117 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-10 22:29:03,118 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-4.wvr.bpl [2021-03-10 22:29:03,118 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-4.wvr.bpl' [2021-03-10 22:29:03,150 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-10 22:29:03,154 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-10 22:29:03,156 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-10 22:29:03,156 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-10 22:29:03,156 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-10 22:29:03,167 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "misc-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:29:03" (1/1) ... [2021-03-10 22:29:03,172 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "misc-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:29:03" (1/1) ... [2021-03-10 22:29:03,177 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-10 22:29:03,178 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-10 22:29:03,178 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-10 22:29:03,178 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-10 22:29:03,183 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "misc-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:29:03" (1/1) ... [2021-03-10 22:29:03,183 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "misc-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:29:03" (1/1) ... [2021-03-10 22:29:03,184 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "misc-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:29:03" (1/1) ... [2021-03-10 22:29:03,184 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "misc-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:29:03" (1/1) ... [2021-03-10 22:29:03,186 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "misc-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:29:03" (1/1) ... [2021-03-10 22:29:03,188 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "misc-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:29:03" (1/1) ... [2021-03-10 22:29:03,189 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "misc-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:29:03" (1/1) ... [2021-03-10 22:29:03,189 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-10 22:29:03,191 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-10 22:29:03,191 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-10 22:29:03,191 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-10 22:29:03,193 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "misc-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:29:03" (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 [2021-03-10 22:29:03,243 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-10 22:29:03,243 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-10 22:29:03,243 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-10 22:29:03,244 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-10 22:29:03,244 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-10 22:29:03,244 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-10 22:29:03,244 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-10 22:29:03,244 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-10 22:29:03,244 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-10 22:29:03,244 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-03-10 22:29:03,244 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-03-10 22:29:03,244 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-03-10 22:29:03,245 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-10 22:29:03,422 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-10 22:29:03,422 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-10 22:29:03,423 INFO L202 PluginConnector]: Adding new model misc-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 10:29:03 BoogieIcfgContainer [2021-03-10 22:29:03,423 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-10 22:29:03,424 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-10 22:29:03,424 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-10 22:29:03,426 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-10 22:29:03,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:29:03" (1/2) ... [2021-03-10 22:29:03,427 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69400dba and model type misc-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.03 10:29:03, skipping insertion in model container [2021-03-10 22:29:03,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 10:29:03" (2/2) ... [2021-03-10 22:29:03,428 INFO L111 eAbstractionObserver]: Analyzing ICFG misc-4.wvr.bpl [2021-03-10 22:29:03,436 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-10 22:29:03,437 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-10 22:29:03,440 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-10 22:29:03,441 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-10 22:29:03,499 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-03-10 22:29:03,510 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-03-10 22:29:03,538 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 22:29:03,538 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 22:29:03,538 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 22:29:03,538 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 22:29:03,538 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 22:29:03,538 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 22:29:03,538 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 22:29:03,538 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 22:29:03,545 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 37 places, 31 transitions, 86 flow [2021-03-10 22:29:03,563 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 233 states, 231 states have (on average 2.9437229437229435) internal successors, (680), 232 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:03,566 INFO L276 IsEmpty]: Start isEmpty. Operand has 233 states, 231 states have (on average 2.9437229437229435) internal successors, (680), 232 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:03,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 22:29:03,573 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:03,573 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:03,574 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:03,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:03,577 INFO L82 PathProgramCache]: Analyzing trace with hash -155015942, now seen corresponding path program 1 times [2021-03-10 22:29:03,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:03,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609217600] [2021-03-10 22:29:03,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:03,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:03,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:03,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609217600] [2021-03-10 22:29:03,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:29:03,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-10 22:29:03,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820541707] [2021-03-10 22:29:03,686 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-10 22:29:03,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:03,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-10 22:29:03,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 22:29:03,700 INFO L87 Difference]: Start difference. First operand has 233 states, 231 states have (on average 2.9437229437229435) internal successors, (680), 232 states have internal predecessors, (680), 0 states have call successors, (0), 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 4.666666666666667) internal successors, (14), 2 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) [2021-03-10 22:29:03,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:03,747 INFO L93 Difference]: Finished difference Result 273 states and 758 transitions. [2021-03-10 22:29:03,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-10 22:29:03,748 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 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 [2021-03-10 22:29:03,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:03,759 INFO L225 Difference]: With dead ends: 273 [2021-03-10 22:29:03,760 INFO L226 Difference]: Without dead ends: 173 [2021-03-10 22:29:03,762 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 22:29:03,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-03-10 22:29:03,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2021-03-10 22:29:03,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.7209302325581395) internal successors, (468), 172 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:03,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 468 transitions. [2021-03-10 22:29:03,811 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 468 transitions. Word has length 14 [2021-03-10 22:29:03,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:03,812 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 468 transitions. [2021-03-10 22:29:03,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 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) [2021-03-10 22:29:03,812 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 468 transitions. [2021-03-10 22:29:03,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 22:29:03,817 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:03,817 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:03,817 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-10 22:29:03,817 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:03,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:03,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1095923484, now seen corresponding path program 2 times [2021-03-10 22:29:03,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:03,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984892053] [2021-03-10 22:29:03,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:03,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:03,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:03,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984892053] [2021-03-10 22:29:03,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:29:03,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 22:29:03,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371617020] [2021-03-10 22:29:03,866 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 22:29:03,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:03,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 22:29:03,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 22:29:03,867 INFO L87 Difference]: Start difference. First operand 173 states and 468 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 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) [2021-03-10 22:29:03,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:03,914 INFO L93 Difference]: Finished difference Result 310 states and 842 transitions. [2021-03-10 22:29:03,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 22:29:03,915 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 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 [2021-03-10 22:29:03,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:03,918 INFO L225 Difference]: With dead ends: 310 [2021-03-10 22:29:03,918 INFO L226 Difference]: Without dead ends: 228 [2021-03-10 22:29:03,918 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:29:03,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-03-10 22:29:03,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 228. [2021-03-10 22:29:03,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.748898678414097) internal successors, (624), 227 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:03,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 624 transitions. [2021-03-10 22:29:03,939 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 624 transitions. Word has length 14 [2021-03-10 22:29:03,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:03,942 INFO L480 AbstractCegarLoop]: Abstraction has 228 states and 624 transitions. [2021-03-10 22:29:03,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 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) [2021-03-10 22:29:03,942 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 624 transitions. [2021-03-10 22:29:03,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:29:03,943 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:03,943 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:03,943 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-10 22:29:03,943 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:03,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:03,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1896035202, now seen corresponding path program 1 times [2021-03-10 22:29:03,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:03,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284066336] [2021-03-10 22:29:03,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:03,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:03,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:03,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284066336] [2021-03-10 22:29:03,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:29:03,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-10 22:29:03,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156358719] [2021-03-10 22:29:03,970 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-10 22:29:03,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:03,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-10 22:29:03,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 22:29:03,971 INFO L87 Difference]: Start difference. First operand 228 states and 624 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:03,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:03,978 INFO L93 Difference]: Finished difference Result 369 states and 981 transitions. [2021-03-10 22:29:03,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-10 22:29:03,978 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:29:03,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:03,980 INFO L225 Difference]: With dead ends: 369 [2021-03-10 22:29:03,980 INFO L226 Difference]: Without dead ends: 369 [2021-03-10 22:29:03,980 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 22:29:03,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-03-10 22:29:03,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 284. [2021-03-10 22:29:03,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.7597173144876326) internal successors, (781), 283 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:03,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 781 transitions. [2021-03-10 22:29:03,992 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 781 transitions. Word has length 18 [2021-03-10 22:29:03,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:03,992 INFO L480 AbstractCegarLoop]: Abstraction has 284 states and 781 transitions. [2021-03-10 22:29:03,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:03,992 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 781 transitions. [2021-03-10 22:29:03,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:29:03,994 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:03,994 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:03,995 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-10 22:29:03,995 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:03,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:03,995 INFO L82 PathProgramCache]: Analyzing trace with hash -778763616, now seen corresponding path program 1 times [2021-03-10 22:29:03,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:03,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789429552] [2021-03-10 22:29:03,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:04,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:04,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:04,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789429552] [2021-03-10 22:29:04,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:29:04,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-10 22:29:04,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966831258] [2021-03-10 22:29:04,008 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-10 22:29:04,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:04,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-10 22:29:04,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 22:29:04,009 INFO L87 Difference]: Start difference. First operand 284 states and 781 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:04,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:04,016 INFO L93 Difference]: Finished difference Result 432 states and 1157 transitions. [2021-03-10 22:29:04,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-10 22:29:04,016 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:29:04,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:04,019 INFO L225 Difference]: With dead ends: 432 [2021-03-10 22:29:04,019 INFO L226 Difference]: Without dead ends: 432 [2021-03-10 22:29:04,019 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 22:29:04,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-03-10 22:29:04,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 348. [2021-03-10 22:29:04,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 2.7636887608069163) internal successors, (959), 347 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) [2021-03-10 22:29:04,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 959 transitions. [2021-03-10 22:29:04,042 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 959 transitions. Word has length 18 [2021-03-10 22:29:04,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:04,043 INFO L480 AbstractCegarLoop]: Abstraction has 348 states and 959 transitions. [2021-03-10 22:29:04,043 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:04,043 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 959 transitions. [2021-03-10 22:29:04,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:29:04,044 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:04,044 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:04,044 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-10 22:29:04,044 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:04,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:04,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1245940290, now seen corresponding path program 1 times [2021-03-10 22:29:04,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:04,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065999379] [2021-03-10 22:29:04,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:04,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:04,101 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:04,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065999379] [2021-03-10 22:29:04,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852139592] [2021-03-10 22:29:04,102 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 [2021-03-10 22:29:04,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:04,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 22:29:04,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:04,261 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:04,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:04,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-03-10 22:29:04,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672729427] [2021-03-10 22:29:04,262 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 22:29:04,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:04,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 22:29:04,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:29:04,263 INFO L87 Difference]: Start difference. First operand 348 states and 959 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:04,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:04,312 INFO L93 Difference]: Finished difference Result 665 states and 1852 transitions. [2021-03-10 22:29:04,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 22:29:04,314 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 22:29:04,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:04,316 INFO L225 Difference]: With dead ends: 665 [2021-03-10 22:29:04,316 INFO L226 Difference]: Without dead ends: 509 [2021-03-10 22:29:04,317 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 17.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-03-10 22:29:04,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-03-10 22:29:04,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 408. [2021-03-10 22:29:04,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 2.7764127764127764) internal successors, (1130), 407 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:04,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1130 transitions. [2021-03-10 22:29:04,328 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1130 transitions. Word has length 22 [2021-03-10 22:29:04,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:04,328 INFO L480 AbstractCegarLoop]: Abstraction has 408 states and 1130 transitions. [2021-03-10 22:29:04,328 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:04,328 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1130 transitions. [2021-03-10 22:29:04,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 22:29:04,329 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:04,329 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:04,545 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:04,546 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:04,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:04,546 INFO L82 PathProgramCache]: Analyzing trace with hash -324898748, now seen corresponding path program 1 times [2021-03-10 22:29:04,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:04,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925415741] [2021-03-10 22:29:04,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:04,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:04,591 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:04,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925415741] [2021-03-10 22:29:04,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251972638] [2021-03-10 22:29:04,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:04,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:04,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 22:29:04,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:04,704 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:04,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:04,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-03-10 22:29:04,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085923351] [2021-03-10 22:29:04,705 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 22:29:04,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:04,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 22:29:04,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:29:04,706 INFO L87 Difference]: Start difference. First operand 408 states and 1130 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:04,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:04,763 INFO L93 Difference]: Finished difference Result 873 states and 2457 transitions. [2021-03-10 22:29:04,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 22:29:04,764 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 22:29:04,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:04,768 INFO L225 Difference]: With dead ends: 873 [2021-03-10 22:29:04,769 INFO L226 Difference]: Without dead ends: 717 [2021-03-10 22:29:04,770 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 20.6ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-03-10 22:29:04,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2021-03-10 22:29:04,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 697. [2021-03-10 22:29:04,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 696 states have (on average 2.8117816091954024) internal successors, (1957), 696 states have internal predecessors, (1957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:04,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1957 transitions. [2021-03-10 22:29:04,793 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1957 transitions. Word has length 22 [2021-03-10 22:29:04,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:04,793 INFO L480 AbstractCegarLoop]: Abstraction has 697 states and 1957 transitions. [2021-03-10 22:29:04,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:04,794 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1957 transitions. [2021-03-10 22:29:04,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:29:04,799 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:04,800 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:05,015 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:05,016 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:05,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:05,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1519255610, now seen corresponding path program 2 times [2021-03-10 22:29:05,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:05,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607502387] [2021-03-10 22:29:05,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:05,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:05,041 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 22:29:05,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607502387] [2021-03-10 22:29:05,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:29:05,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 22:29:05,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950323665] [2021-03-10 22:29:05,042 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 22:29:05,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:05,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 22:29:05,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 22:29:05,043 INFO L87 Difference]: Start difference. First operand 697 states and 1957 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 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) [2021-03-10 22:29:05,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:05,054 INFO L93 Difference]: Finished difference Result 873 states and 2302 transitions. [2021-03-10 22:29:05,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 22:29:05,055 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 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 26 [2021-03-10 22:29:05,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:05,058 INFO L225 Difference]: With dead ends: 873 [2021-03-10 22:29:05,058 INFO L226 Difference]: Without dead ends: 873 [2021-03-10 22:29:05,058 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 22:29:05,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2021-03-10 22:29:05,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 671. [2021-03-10 22:29:05,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 670 states have (on average 2.662686567164179) internal successors, (1784), 670 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:05,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 1784 transitions. [2021-03-10 22:29:05,074 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 1784 transitions. Word has length 26 [2021-03-10 22:29:05,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:05,074 INFO L480 AbstractCegarLoop]: Abstraction has 671 states and 1784 transitions. [2021-03-10 22:29:05,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 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) [2021-03-10 22:29:05,074 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 1784 transitions. [2021-03-10 22:29:05,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 22:29:05,075 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:05,075 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:05,076 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-03-10 22:29:05,076 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:05,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:05,076 INFO L82 PathProgramCache]: Analyzing trace with hash -193714232, now seen corresponding path program 2 times [2021-03-10 22:29:05,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:05,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824792276] [2021-03-10 22:29:05,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:05,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:05,090 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 22:29:05,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824792276] [2021-03-10 22:29:05,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:29:05,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 22:29:05,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186925419] [2021-03-10 22:29:05,091 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 22:29:05,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:05,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 22:29:05,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 22:29:05,091 INFO L87 Difference]: Start difference. First operand 671 states and 1784 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 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) [2021-03-10 22:29:05,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:05,108 INFO L93 Difference]: Finished difference Result 803 states and 1991 transitions. [2021-03-10 22:29:05,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 22:29:05,109 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 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 26 [2021-03-10 22:29:05,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:05,112 INFO L225 Difference]: With dead ends: 803 [2021-03-10 22:29:05,112 INFO L226 Difference]: Without dead ends: 803 [2021-03-10 22:29:05,112 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 22:29:05,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2021-03-10 22:29:05,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 679. [2021-03-10 22:29:05,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 679 states, 678 states have (on average 2.5250737463126844) internal successors, (1712), 678 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:05,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 1712 transitions. [2021-03-10 22:29:05,126 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 1712 transitions. Word has length 26 [2021-03-10 22:29:05,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:05,127 INFO L480 AbstractCegarLoop]: Abstraction has 679 states and 1712 transitions. [2021-03-10 22:29:05,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 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) [2021-03-10 22:29:05,127 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 1712 transitions. [2021-03-10 22:29:05,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:29:05,129 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:05,129 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:05,129 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-03-10 22:29:05,129 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:05,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:05,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1064544916, now seen corresponding path program 1 times [2021-03-10 22:29:05,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:05,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105260598] [2021-03-10 22:29:05,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:05,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:05,180 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:05,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105260598] [2021-03-10 22:29:05,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124880026] [2021-03-10 22:29:05,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-03-10 22:29:05,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:05,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 22:29:05,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:29:05,264 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:05,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:05,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-03-10 22:29:05,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259976645] [2021-03-10 22:29:05,265 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 22:29:05,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:05,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 22:29:05,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-10 22:29:05,266 INFO L87 Difference]: Start difference. First operand 679 states and 1712 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 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) [2021-03-10 22:29:05,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:05,354 INFO L93 Difference]: Finished difference Result 1111 states and 2808 transitions. [2021-03-10 22:29:05,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 22:29:05,355 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 22:29:05,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:05,359 INFO L225 Difference]: With dead ends: 1111 [2021-03-10 22:29:05,359 INFO L226 Difference]: Without dead ends: 935 [2021-03-10 22:29:05,359 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 24.2ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:29:05,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2021-03-10 22:29:05,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 478. [2021-03-10 22:29:05,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 477 states have (on average 2.542976939203354) internal successors, (1213), 477 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:29:05,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 1213 transitions. [2021-03-10 22:29:05,374 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 1213 transitions. Word has length 30 [2021-03-10 22:29:05,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:05,374 INFO L480 AbstractCegarLoop]: Abstraction has 478 states and 1213 transitions. [2021-03-10 22:29:05,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 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) [2021-03-10 22:29:05,374 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 1213 transitions. [2021-03-10 22:29:05,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 22:29:05,376 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:29:05,376 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:29:05,591 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:05,592 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:29:05,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:29:05,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1763804396, now seen corresponding path program 2 times [2021-03-10 22:29:05,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:29:05,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303419663] [2021-03-10 22:29:05,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:29:05,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:29:05,627 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:05,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303419663] [2021-03-10 22:29:05,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351391029] [2021-03-10 22:29:05,628 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 22:29:05,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:29:05,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:29:05,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 22:29:05,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:05,734 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:29:05,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:29:05,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-03-10 22:29:05,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749244799] [2021-03-10 22:29:05,735 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 22:29:05,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:29:05,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 22:29:05,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-10 22:29:05,735 INFO L87 Difference]: Start difference. First operand 478 states and 1213 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 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) [2021-03-10 22:29:05,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:29:05,796 INFO L93 Difference]: Finished difference Result 458 states and 1138 transitions. [2021-03-10 22:29:05,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 22:29:05,797 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 22:29:05,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:29:05,797 INFO L225 Difference]: With dead ends: 458 [2021-03-10 22:29:05,797 INFO L226 Difference]: Without dead ends: 0 [2021-03-10 22:29:05,797 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 34.2ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:29:05,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-03-10 22:29:05,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-03-10 22:29:05,797 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) [2021-03-10 22:29:05,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-03-10 22:29:05,798 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 30 [2021-03-10 22:29:05,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:29:05,798 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-03-10 22:29:05,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 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) [2021-03-10 22:29:05,798 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-03-10 22:29:05,798 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-03-10 22:29:06,009 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:29:06,014 INFO L202 PluginConnector]: Adding new model misc-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.03 10:29:06 BasicIcfg [2021-03-10 22:29:06,014 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-10 22:29:06,014 INFO L168 Benchmark]: Toolchain (without parser) took 2862.79 ms. Allocated memory was 255.9 MB in the beginning and 400.6 MB in the end (delta: 144.7 MB). Free memory was 236.5 MB in the beginning and 332.5 MB in the end (delta: -96.0 MB). Peak memory consumption was 48.2 MB. Max. memory is 16.0 GB. [2021-03-10 22:29:06,015 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 255.9 MB. Free memory is still 237.6 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 22:29:06,015 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.06 ms. Allocated memory is still 255.9 MB. Free memory was 236.0 MB in the beginning and 234.6 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 22:29:06,015 INFO L168 Benchmark]: Boogie Preprocessor took 11.75 ms. Allocated memory is still 255.9 MB. Free memory was 234.6 MB in the beginning and 233.6 MB in the end (delta: 959.6 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. [2021-03-10 22:29:06,015 INFO L168 Benchmark]: RCFGBuilder took 232.63 ms. Allocated memory is still 255.9 MB. Free memory was 233.5 MB in the beginning and 239.6 MB in the end (delta: -6.1 MB). Peak memory consumption was 19.9 MB. Max. memory is 16.0 GB. [2021-03-10 22:29:06,015 INFO L168 Benchmark]: TraceAbstraction took 2589.50 ms. Allocated memory was 255.9 MB in the beginning and 400.6 MB in the end (delta: 144.7 MB). Free memory was 239.1 MB in the beginning and 332.5 MB in the end (delta: -93.3 MB). Peak memory consumption was 49.2 MB. Max. memory is 16.0 GB. [2021-03-10 22:29:06,015 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 255.9 MB. Free memory is still 237.6 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 21.06 ms. Allocated memory is still 255.9 MB. Free memory was 236.0 MB in the beginning and 234.6 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 11.75 ms. Allocated memory is still 255.9 MB. Free memory was 234.6 MB in the beginning and 233.6 MB in the end (delta: 959.6 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. * RCFGBuilder took 232.63 ms. Allocated memory is still 255.9 MB. Free memory was 233.5 MB in the beginning and 239.6 MB in the end (delta: -6.1 MB). Peak memory consumption was 19.9 MB. Max. memory is 16.0 GB. * TraceAbstraction took 2589.50 ms. Allocated memory was 255.9 MB in the beginning and 400.6 MB in the end (delta: 144.7 MB). Free memory was 239.1 MB in the beginning and 332.5 MB in the end (delta: -93.3 MB). Peak memory consumption was 49.2 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 62]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2473.9ms, OverallIterations: 10, TraceHistogramMax: 3, EmptinessCheckTime: 28.8ms, AutomataDifference: 458.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 25.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 282 SDtfs, 348 SDslu, 340 SDs, 0 SdLazy, 183 SolverSat, 84 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 184.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 153 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 149.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=697occurred in iteration=6, InterpolantAutomatonStates: 43, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 173.0ms AutomataMinimizationTime, 10 MinimizatonAttempts, 1073 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 35.7ms SsaConstructionTime, 116.7ms SatisfiabilityAnalysisTime, 578.0ms InterpolantComputationTime, 324 NumberOfCodeBlocks, 324 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 310 ConstructedInterpolants, 0 QuantifiedInterpolants, 574 SizeOfPredicates, 4 NumberOfNonLiveVariables, 212 ConjunctsInSsa, 24 ConjunctsInUnsatCore, 14 InterpolantComputations, 6 PerfectInterpolantSequences, 66/88 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 proved your program to be correct! Received shutdown request...