/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/regression/example_multiple_interleavings.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-10 20:41:06,429 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-10 20:41:06,430 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-10 20:41:06,452 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-10 20:41:06,452 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-10 20:41:06,455 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-10 20:41:06,457 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-10 20:41:06,458 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-10 20:41:06,459 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-10 20:41:06,459 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-10 20:41:06,460 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-10 20:41:06,461 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-10 20:41:06,461 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-10 20:41:06,461 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-10 20:41:06,462 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-10 20:41:06,462 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-10 20:41:06,463 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-10 20:41:06,464 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-10 20:41:06,464 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-10 20:41:06,465 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-10 20:41:06,466 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-10 20:41:06,479 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-10 20:41:06,480 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-10 20:41:06,481 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-10 20:41:06,483 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-03-10 20:41:06,484 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-03-10 20:41:06,484 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-03-10 20:41:06,484 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-03-10 20:41:06,484 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-03-10 20:41:06,485 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-03-10 20:41:06,485 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-03-10 20:41:06,485 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-03-10 20:41:06,486 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-03-10 20:41:06,486 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-03-10 20:41:06,487 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-03-10 20:41:06,487 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-03-10 20:41:06,487 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-03-10 20:41:06,488 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-03-10 20:41:06,488 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-10 20:41:06,488 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-10 20:41:06,489 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-10 20:41:06,489 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 20:41:06,502 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-10 20:41:06,502 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-10 20:41:06,503 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-10 20:41:06,503 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-10 20:41:06,503 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-10 20:41:06,503 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-10 20:41:06,504 INFO L138 SettingsManager]: * Use SBE=true [2021-03-10 20:41:06,504 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-10 20:41:06,504 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-10 20:41:06,504 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-10 20:41:06,504 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-10 20:41:06,504 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-10 20:41:06,504 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-10 20:41:06,504 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-10 20:41:06,504 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-10 20:41:06,504 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-10 20:41:06,504 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-10 20:41:06,504 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-10 20:41:06,504 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-10 20:41:06,505 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-10 20:41:06,505 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-10 20:41:06,505 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-10 20:41:06,505 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-10 20:41:06,505 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 20:41:06,505 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-10 20:41:06,505 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-10 20:41:06,505 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-10 20:41:06,505 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-10 20:41:06,505 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-10 20:41:06,505 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-10 20:41:06,506 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-10 20:41:06,506 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-10 20:41:06,746 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-10 20:41:06,760 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-10 20:41:06,761 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-10 20:41:06,762 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-10 20:41:06,771 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-10 20:41:06,772 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/example_multiple_interleavings.bpl [2021-03-10 20:41:06,772 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/example_multiple_interleavings.bpl' [2021-03-10 20:41:06,805 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-10 20:41:06,809 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-10 20:41:06,810 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-10 20:41:06,810 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-10 20:41:06,810 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-10 20:41:06,818 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "example_multiple_interleavings.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:41:06" (1/1) ... [2021-03-10 20:41:06,825 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "example_multiple_interleavings.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:41:06" (1/1) ... [2021-03-10 20:41:06,829 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-10 20:41:06,830 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-10 20:41:06,831 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-10 20:41:06,831 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-10 20:41:06,836 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "example_multiple_interleavings.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:41:06" (1/1) ... [2021-03-10 20:41:06,837 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "example_multiple_interleavings.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:41:06" (1/1) ... [2021-03-10 20:41:06,837 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "example_multiple_interleavings.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:41:06" (1/1) ... [2021-03-10 20:41:06,837 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "example_multiple_interleavings.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:41:06" (1/1) ... [2021-03-10 20:41:06,839 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "example_multiple_interleavings.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:41:06" (1/1) ... [2021-03-10 20:41:06,839 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "example_multiple_interleavings.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:41:06" (1/1) ... [2021-03-10 20:41:06,839 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "example_multiple_interleavings.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:41:06" (1/1) ... [2021-03-10 20:41:06,840 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-10 20:41:06,840 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-10 20:41:06,841 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-10 20:41:06,841 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-10 20:41:06,842 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "example_multiple_interleavings.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:41:06" (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 20:41:06,900 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_y given in one single declaration [2021-03-10 20:41:06,901 INFO L130 BoogieDeclarations]: Found specification of procedure set_y [2021-03-10 20:41:06,901 INFO L138 BoogieDeclarations]: Found implementation of procedure set_y [2021-03-10 20:41:06,901 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_x_1 given in one single declaration [2021-03-10 20:41:06,901 INFO L130 BoogieDeclarations]: Found specification of procedure set_x_1 [2021-03-10 20:41:06,901 INFO L138 BoogieDeclarations]: Found implementation of procedure set_x_1 [2021-03-10 20:41:06,901 INFO L124 BoogieDeclarations]: Specification and implementation of procedure set_x_0 given in one single declaration [2021-03-10 20:41:06,901 INFO L130 BoogieDeclarations]: Found specification of procedure set_x_0 [2021-03-10 20:41:06,901 INFO L138 BoogieDeclarations]: Found implementation of procedure set_x_0 [2021-03-10 20:41:06,902 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-10 20:41:06,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-10 20:41:06,902 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-10 20:41:06,903 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 20:41:06,992 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-10 20:41:06,992 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-10 20:41:06,993 INFO L202 PluginConnector]: Adding new model example_multiple_interleavings.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 08:41:06 BoogieIcfgContainer [2021-03-10 20:41:06,993 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-10 20:41:06,994 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-10 20:41:06,994 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-10 20:41:06,996 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-10 20:41:06,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_multiple_interleavings.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 08:41:06" (1/2) ... [2021-03-10 20:41:06,997 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@365eb9fb and model type example_multiple_interleavings.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.03 08:41:06, skipping insertion in model container [2021-03-10 20:41:06,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example_multiple_interleavings.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 08:41:06" (2/2) ... [2021-03-10 20:41:06,997 INFO L111 eAbstractionObserver]: Analyzing ICFG example_multiple_interleavings.bpl [2021-03-10 20:41:07,001 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-10 20:41:07,001 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-10 20:41:07,003 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-10 20:41:07,003 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-10 20:41:07,026 INFO L149 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2021-03-10 20:41:07,036 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-03-10 20:41:07,047 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 20:41:07,047 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 20:41:07,047 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 20:41:07,048 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 20:41:07,048 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 20:41:07,048 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 20:41:07,048 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 20:41:07,048 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 20:41:07,053 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 24 transitions, 90 flow [2021-03-10 20:41:07,062 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 80 states, 78 states have (on average 2.230769230769231) internal successors, (174), 79 states have internal predecessors, (174), 0 states have call successors, (0), 0 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 20:41:07,064 INFO L276 IsEmpty]: Start isEmpty. Operand has 80 states, 78 states have (on average 2.230769230769231) internal successors, (174), 79 states have internal predecessors, (174), 0 states have call successors, (0), 0 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 20:41:07,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 20:41:07,068 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:41:07,069 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:41:07,069 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:41:07,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:41:07,072 INFO L82 PathProgramCache]: Analyzing trace with hash -921991570, now seen corresponding path program 1 times [2021-03-10 20:41:07,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:41:07,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972922192] [2021-03-10 20:41:07,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:41:07,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:41:07,180 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 20:41:07,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972922192] [2021-03-10 20:41:07,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 20:41:07,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 20:41:07,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656303924] [2021-03-10 20:41:07,184 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-10 20:41:07,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:41:07,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-10 20:41:07,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 20:41:07,192 INFO L87 Difference]: Start difference. First operand has 80 states, 78 states have (on average 2.230769230769231) internal successors, (174), 79 states have internal predecessors, (174), 0 states have call successors, (0), 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 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:41:07,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:41:07,227 INFO L93 Difference]: Finished difference Result 65 states and 135 transitions. [2021-03-10 20:41:07,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-10 20:41:07,229 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-03-10 20:41:07,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:41:07,233 INFO L225 Difference]: With dead ends: 65 [2021-03-10 20:41:07,233 INFO L226 Difference]: Without dead ends: 63 [2021-03-10 20:41:07,234 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 20:41:07,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-03-10 20:41:07,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-03-10 20:41:07,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.1451612903225805) internal successors, (133), 62 states have internal predecessors, (133), 0 states have call successors, (0), 0 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 20:41:07,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 133 transitions. [2021-03-10 20:41:07,268 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 133 transitions. Word has length 13 [2021-03-10 20:41:07,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:41:07,268 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 133 transitions. [2021-03-10 20:41:07,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:41:07,268 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 133 transitions. [2021-03-10 20:41:07,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 20:41:07,270 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:41:07,270 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:41:07,270 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-10 20:41:07,270 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:41:07,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:41:07,273 INFO L82 PathProgramCache]: Analyzing trace with hash -922453780, now seen corresponding path program 1 times [2021-03-10 20:41:07,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:41:07,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648471199] [2021-03-10 20:41:07,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:41:07,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:41:07,320 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 20:41:07,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648471199] [2021-03-10 20:41:07,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 20:41:07,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 20:41:07,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987131974] [2021-03-10 20:41:07,321 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 20:41:07,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:41:07,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 20:41:07,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-10 20:41:07,325 INFO L87 Difference]: Start difference. First operand 63 states and 133 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:41:07,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:41:07,342 INFO L93 Difference]: Finished difference Result 88 states and 180 transitions. [2021-03-10 20:41:07,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 20:41:07,342 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-03-10 20:41:07,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:41:07,345 INFO L225 Difference]: With dead ends: 88 [2021-03-10 20:41:07,345 INFO L226 Difference]: Without dead ends: 63 [2021-03-10 20:41:07,346 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-10 20:41:07,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-03-10 20:41:07,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2021-03-10 20:41:07,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.0535714285714284) internal successors, (115), 56 states have internal predecessors, (115), 0 states have call successors, (0), 0 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 20:41:07,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 115 transitions. [2021-03-10 20:41:07,358 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 115 transitions. Word has length 13 [2021-03-10 20:41:07,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:41:07,359 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 115 transitions. [2021-03-10 20:41:07,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:41:07,359 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 115 transitions. [2021-03-10 20:41:07,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 20:41:07,359 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:41:07,359 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:41:07,359 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-10 20:41:07,360 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:41:07,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:41:07,360 INFO L82 PathProgramCache]: Analyzing trace with hash 674715692, now seen corresponding path program 2 times [2021-03-10 20:41:07,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:41:07,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777029301] [2021-03-10 20:41:07,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:41:07,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:41:07,397 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 20:41:07,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777029301] [2021-03-10 20:41:07,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 20:41:07,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 20:41:07,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556705254] [2021-03-10 20:41:07,398 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 20:41:07,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:41:07,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 20:41:07,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-10 20:41:07,401 INFO L87 Difference]: Start difference. First operand 57 states and 115 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:41:07,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:41:07,413 INFO L93 Difference]: Finished difference Result 95 states and 191 transitions. [2021-03-10 20:41:07,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 20:41:07,414 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-03-10 20:41:07,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:41:07,415 INFO L225 Difference]: With dead ends: 95 [2021-03-10 20:41:07,415 INFO L226 Difference]: Without dead ends: 56 [2021-03-10 20:41:07,415 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-10 20:41:07,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-03-10 20:41:07,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2021-03-10 20:41:07,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 2.020408163265306) internal successors, (99), 49 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:41:07,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 99 transitions. [2021-03-10 20:41:07,422 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 99 transitions. Word has length 13 [2021-03-10 20:41:07,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:41:07,422 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 99 transitions. [2021-03-10 20:41:07,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:41:07,422 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 99 transitions. [2021-03-10 20:41:07,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 20:41:07,422 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:41:07,423 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:41:07,423 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-10 20:41:07,423 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:41:07,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:41:07,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1989043106, now seen corresponding path program 3 times [2021-03-10 20:41:07,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:41:07,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939695746] [2021-03-10 20:41:07,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:41:07,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:41:07,451 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 20:41:07,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939695746] [2021-03-10 20:41:07,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 20:41:07,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 20:41:07,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079946199] [2021-03-10 20:41:07,452 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 20:41:07,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:41:07,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 20:41:07,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-10 20:41:07,453 INFO L87 Difference]: Start difference. First operand 50 states and 99 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:41:07,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:41:07,457 INFO L93 Difference]: Finished difference Result 69 states and 133 transitions. [2021-03-10 20:41:07,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 20:41:07,458 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-03-10 20:41:07,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:41:07,458 INFO L225 Difference]: With dead ends: 69 [2021-03-10 20:41:07,458 INFO L226 Difference]: Without dead ends: 42 [2021-03-10 20:41:07,459 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-10 20:41:07,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-03-10 20:41:07,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-03-10 20:41:07,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 41 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:41:07,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 79 transitions. [2021-03-10 20:41:07,461 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 79 transitions. Word has length 13 [2021-03-10 20:41:07,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:41:07,461 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 79 transitions. [2021-03-10 20:41:07,461 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:41:07,461 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 79 transitions. [2021-03-10 20:41:07,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 20:41:07,461 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 20:41:07,461 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 20:41:07,461 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-10 20:41:07,462 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 20:41:07,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 20:41:07,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1122234654, now seen corresponding path program 4 times [2021-03-10 20:41:07,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 20:41:07,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071073108] [2021-03-10 20:41:07,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 20:41:07,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 20:41:07,480 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 20:41:07,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071073108] [2021-03-10 20:41:07,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 20:41:07,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 20:41:07,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185301455] [2021-03-10 20:41:07,480 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 20:41:07,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 20:41:07,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 20:41:07,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-10 20:41:07,481 INFO L87 Difference]: Start difference. First operand 42 states and 79 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:41:07,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 20:41:07,484 INFO L93 Difference]: Finished difference Result 41 states and 78 transitions. [2021-03-10 20:41:07,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 20:41:07,484 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-03-10 20:41:07,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 20:41:07,484 INFO L225 Difference]: With dead ends: 41 [2021-03-10 20:41:07,484 INFO L226 Difference]: Without dead ends: 0 [2021-03-10 20:41:07,485 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-10 20:41:07,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-03-10 20:41:07,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-03-10 20:41:07,485 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 20:41:07,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-03-10 20:41:07,485 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 13 [2021-03-10 20:41:07,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 20:41:07,485 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-03-10 20:41:07,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 20:41:07,486 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-03-10 20:41:07,486 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-03-10 20:41:07,486 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-10 20:41:07,489 INFO L202 PluginConnector]: Adding new model example_multiple_interleavings.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.03 08:41:07 BasicIcfg [2021-03-10 20:41:07,489 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-10 20:41:07,489 INFO L168 Benchmark]: Toolchain (without parser) took 682.67 ms. Allocated memory is still 373.3 MB. Free memory was 353.8 MB in the beginning and 322.5 MB in the end (delta: 31.3 MB). Peak memory consumption was 33.7 MB. Max. memory is 16.0 GB. [2021-03-10 20:41:07,490 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 373.3 MB. Free memory was 354.8 MB in the beginning and 354.8 MB in the end (delta: 75.0 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 20:41:07,490 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.65 ms. Allocated memory is still 373.3 MB. Free memory was 353.3 MB in the beginning and 351.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-10 20:41:07,490 INFO L168 Benchmark]: Boogie Preprocessor took 9.50 ms. Allocated memory is still 373.3 MB. Free memory was 351.8 MB in the beginning and 351.0 MB in the end (delta: 824.0 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 20:41:07,491 INFO L168 Benchmark]: RCFGBuilder took 152.75 ms. Allocated memory is still 373.3 MB. Free memory was 350.9 MB in the beginning and 342.2 MB in the end (delta: 8.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. [2021-03-10 20:41:07,491 INFO L168 Benchmark]: TraceAbstraction took 494.78 ms. Allocated memory is still 373.3 MB. Free memory was 341.7 MB in the beginning and 322.5 MB in the end (delta: 19.2 MB). Peak memory consumption was 21.1 MB. Max. memory is 16.0 GB. [2021-03-10 20:41:07,492 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 0.10 ms. Allocated memory is still 373.3 MB. Free memory was 354.8 MB in the beginning and 354.8 MB in the end (delta: 75.0 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 19.65 ms. Allocated memory is still 373.3 MB. Free memory was 353.3 MB in the beginning and 351.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 9.50 ms. Allocated memory is still 373.3 MB. Free memory was 351.8 MB in the beginning and 351.0 MB in the end (delta: 824.0 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 152.75 ms. Allocated memory is still 373.3 MB. Free memory was 350.9 MB in the beginning and 342.2 MB in the end (delta: 8.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. * TraceAbstraction took 494.78 ms. Allocated memory is still 373.3 MB. Free memory was 341.7 MB in the beginning and 322.5 MB in the end (delta: 19.2 MB). Peak memory consumption was 21.1 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 19]: 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, 19 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 440.1ms, OverallIterations: 5, TraceHistogramMax: 1, EmptinessCheckTime: 8.4ms, AutomataDifference: 100.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 14.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 123 SDtfs, 72 SDslu, 76 SDs, 0 SdLazy, 17 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 29.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=80occurred in iteration=0, InterpolantAutomatonStates: 19, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 46.4ms AutomataMinimizationTime, 5 MinimizatonAttempts, 12 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 8.6ms SsaConstructionTime, 18.2ms SatisfiabilityAnalysisTime, 152.9ms InterpolantComputationTime, 65 NumberOfCodeBlocks, 65 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 60 ConstructedInterpolants, 0 QuantifiedInterpolants, 218 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 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 RESULT: Ultimate proved your program to be correct! Received shutdown request...