/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-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/simpl-str-subst.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-11 15:54:20,992 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-11 15:54:20,993 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-11 15:54:21,018 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-11 15:54:21,059 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-11 15:54:21,060 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-11 15:54:21,061 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-11 15:54:21,062 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-11 15:54:21,064 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-11 15:54:21,065 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-11 15:54:21,066 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-11 15:54:21,072 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-11 15:54:21,073 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-11 15:54:21,074 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-11 15:54:21,074 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-11 15:54:21,076 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-11 15:54:21,080 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-11 15:54:21,086 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-11 15:54:21,086 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-11 15:54:21,087 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-11 15:54:21,088 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-SemanticLbe.epf [2021-03-11 15:54:21,118 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-11 15:54:21,118 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-11 15:54:21,120 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-11 15:54:21,121 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-11 15:54:21,121 INFO L138 SettingsManager]: * Use SBE=true [2021-03-11 15:54:21,121 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-11 15:54:21,121 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-11 15:54:21,121 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-11 15:54:21,121 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-11 15:54:21,121 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-11 15:54:21,122 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-11 15:54:21,122 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-11 15:54:21,122 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-11 15:54:21,122 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-11 15:54:21,123 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-11 15:54:21,123 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-11 15:54:21,123 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-11 15:54:21,123 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-11 15:54:21,123 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-11 15:54:21,123 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-11 15:54:21,123 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-11 15:54:21,123 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 15:54:21,124 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-11 15:54:21,124 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-11 15:54:21,124 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-11 15:54:21,124 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-11 15:54:21,124 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-11 15:54:21,124 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-11 15:54:21,124 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-11 15:54:21,374 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-11 15:54:21,389 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-11 15:54:21,391 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-11 15:54:21,391 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-11 15:54:21,392 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-11 15:54:21,392 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/simpl-str-subst.wvr.bpl [2021-03-11 15:54:21,393 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/simpl-str-subst.wvr.bpl' [2021-03-11 15:54:21,425 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-11 15:54:21,429 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-11 15:54:21,430 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-11 15:54:21,430 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-11 15:54:21,431 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-11 15:54:21,438 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "simpl-str-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 03:54:21" (1/1) ... [2021-03-11 15:54:21,445 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "simpl-str-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 03:54:21" (1/1) ... [2021-03-11 15:54:21,450 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-11 15:54:21,451 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-11 15:54:21,451 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-11 15:54:21,451 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-11 15:54:21,456 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "simpl-str-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 03:54:21" (1/1) ... [2021-03-11 15:54:21,456 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "simpl-str-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 03:54:21" (1/1) ... [2021-03-11 15:54:21,458 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "simpl-str-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 03:54:21" (1/1) ... [2021-03-11 15:54:21,459 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "simpl-str-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 03:54:21" (1/1) ... [2021-03-11 15:54:21,461 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "simpl-str-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 03:54:21" (1/1) ... [2021-03-11 15:54:21,462 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "simpl-str-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 03:54:21" (1/1) ... [2021-03-11 15:54:21,462 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "simpl-str-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 03:54:21" (1/1) ... [2021-03-11 15:54:21,465 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-11 15:54:21,466 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-11 15:54:21,466 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-11 15:54:21,466 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-11 15:54:21,467 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "simpl-str-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 03:54:21" (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 [2021-03-11 15:54:21,517 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-11 15:54:21,517 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-11 15:54:21,517 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-11 15:54:21,517 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-11 15:54:21,517 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-11 15:54:21,518 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-11 15:54:21,518 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-11 15:54:21,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-11 15:54:21,518 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-11 15:54:21,518 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-03-11 15:54:21,518 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-03-11 15:54:21,518 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-03-11 15:54:21,518 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-11 15:54:21,628 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-11 15:54:21,628 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-11 15:54:21,629 INFO L202 PluginConnector]: Adding new model simpl-str-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 03:54:21 BoogieIcfgContainer [2021-03-11 15:54:21,629 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-11 15:54:21,640 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-11 15:54:21,641 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-11 15:54:21,643 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-11 15:54:21,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simpl-str-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 03:54:21" (1/2) ... [2021-03-11 15:54:21,644 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@197f4efc and model type simpl-str-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.03 03:54:21, skipping insertion in model container [2021-03-11 15:54:21,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simpl-str-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 03:54:21" (2/2) ... [2021-03-11 15:54:21,648 INFO L111 eAbstractionObserver]: Analyzing ICFG simpl-str-subst.wvr.bpl [2021-03-11 15:54:21,652 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-11 15:54:21,653 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-11 15:54:21,656 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-11 15:54:21,656 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-11 15:54:21,694 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-03-11 15:54:21,705 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-03-11 15:54:21,739 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 15:54:21,739 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-11 15:54:21,739 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 15:54:21,739 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 15:54:21,739 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 15:54:21,739 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 15:54:21,739 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 15:54:21,739 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 15:54:21,755 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-11 15:54:21,761 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 29 places, 19 transitions, 62 flow [2021-03-11 15:54:21,765 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 29 places, 19 transitions, 62 flow [2021-03-11 15:54:21,772 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 29 places, 19 transitions, 62 flow [2021-03-11 15:54:21,785 INFO L129 PetriNetUnfolder]: 0/16 cut-off events. [2021-03-11 15:54:21,785 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-03-11 15:54:21,786 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 16 events. 0/16 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 14 event pairs, 0 based on Foata normal form. 0/15 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-11 15:54:21,787 INFO L116 LiptonReduction]: Number of co-enabled transitions 48 [2021-03-11 15:54:21,939 INFO L131 LiptonReduction]: Checked pairs total: 54 [2021-03-11 15:54:21,939 INFO L133 LiptonReduction]: Total number of compositions: 6 [2021-03-11 15:54:21,947 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 24 places, 14 transitions, 52 flow [2021-03-11 15:54:21,955 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 24 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 15:54:21,956 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 15:54:21,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-03-11 15:54:21,964 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 15:54:21,965 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 15:54:21,965 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 15:54:21,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 15:54:21,971 INFO L82 PathProgramCache]: Analyzing trace with hash 123012460, now seen corresponding path program 1 times [2021-03-11 15:54:21,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 15:54:21,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929748216] [2021-03-11 15:54:21,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 15:54:22,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 15:54:22,221 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 15:54:22,222 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 15:54:22,237 INFO L142 QuantifierPusher]: treesize reduction 66, result has 35.3 percent of original size [2021-03-11 15:54:22,240 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-03-11 15:54:22,298 INFO L142 QuantifierPusher]: treesize reduction 58, result has 56.4 percent of original size [2021-03-11 15:54:22,303 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 75 [2021-03-11 15:54:22,389 INFO L142 QuantifierPusher]: treesize reduction 95, result has 37.9 percent of original size [2021-03-11 15:54:22,393 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 58 [2021-03-11 15:54:22,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 15:54:22,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929748216] [2021-03-11 15:54:22,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 15:54:22,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-11 15:54:22,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395913605] [2021-03-11 15:54:22,448 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 15:54:22,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 15:54:22,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 15:54:22,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-11 15:54:22,461 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 15:54:22,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 15:54:22,628 INFO L93 Difference]: Finished difference Result 34 states and 47 transitions. [2021-03-11 15:54:22,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 15:54:22,629 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-03-11 15:54:22,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 15:54:22,634 INFO L225 Difference]: With dead ends: 34 [2021-03-11 15:54:22,634 INFO L226 Difference]: Without dead ends: 28 [2021-03-11 15:54:22,636 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 268.1ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-11 15:54:22,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-03-11 15:54:22,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 23. [2021-03-11 15:54:22,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 15:54:22,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 35 transitions. [2021-03-11 15:54:22,660 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 35 transitions. Word has length 10 [2021-03-11 15:54:22,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 15:54:22,660 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 35 transitions. [2021-03-11 15:54:22,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 15:54:22,660 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 35 transitions. [2021-03-11 15:54:22,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-03-11 15:54:22,661 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 15:54:22,661 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 15:54:22,661 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-11 15:54:22,662 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 15:54:22,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 15:54:22,662 INFO L82 PathProgramCache]: Analyzing trace with hash 11296210, now seen corresponding path program 2 times [2021-03-11 15:54:22,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 15:54:22,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153682911] [2021-03-11 15:54:22,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 15:54:22,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 15:54:22,775 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 15:54:22,776 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 15:54:22,777 INFO L142 QuantifierPusher]: treesize reduction 73, result has 33.0 percent of original size [2021-03-11 15:54:22,778 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 36 [2021-03-11 15:54:22,796 INFO L142 QuantifierPusher]: treesize reduction 88, result has 48.2 percent of original size [2021-03-11 15:54:22,797 INFO L147 QuantifierPusher]: treesize reduction 5, result has 93.9 percent of original size 77 [2021-03-11 15:54:22,863 INFO L142 QuantifierPusher]: treesize reduction 87, result has 36.0 percent of original size [2021-03-11 15:54:22,864 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-03-11 15:54:22,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 15:54:22,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153682911] [2021-03-11 15:54:22,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 15:54:22,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-11 15:54:22,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528204628] [2021-03-11 15:54:22,893 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 15:54:22,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 15:54:22,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 15:54:22,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-11 15:54:22,894 INFO L87 Difference]: Start difference. First operand 23 states and 35 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 15:54:23,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 15:54:23,038 INFO L93 Difference]: Finished difference Result 36 states and 48 transitions. [2021-03-11 15:54:23,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 15:54:23,038 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-03-11 15:54:23,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 15:54:23,040 INFO L225 Difference]: With dead ends: 36 [2021-03-11 15:54:23,040 INFO L226 Difference]: Without dead ends: 24 [2021-03-11 15:54:23,040 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 227.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-11 15:54:23,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-03-11 15:54:23,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 19. [2021-03-11 15:54:23,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 15:54:23,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 26 transitions. [2021-03-11 15:54:23,045 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 26 transitions. Word has length 10 [2021-03-11 15:54:23,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 15:54:23,045 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 26 transitions. [2021-03-11 15:54:23,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 15:54:23,046 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 26 transitions. [2021-03-11 15:54:23,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-03-11 15:54:23,046 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 15:54:23,047 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 15:54:23,047 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-11 15:54:23,047 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 15:54:23,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 15:54:23,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1059579910, now seen corresponding path program 3 times [2021-03-11 15:54:23,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 15:54:23,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402433422] [2021-03-11 15:54:23,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 15:54:23,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 15:54:23,103 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 15:54:23,104 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 15:54:23,106 INFO L142 QuantifierPusher]: treesize reduction 78, result has 50.3 percent of original size [2021-03-11 15:54:23,107 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 79 [2021-03-11 15:54:23,173 INFO L142 QuantifierPusher]: treesize reduction 177, result has 39.4 percent of original size [2021-03-11 15:54:23,175 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 115 [2021-03-11 15:54:23,273 INFO L142 QuantifierPusher]: treesize reduction 45, result has 65.4 percent of original size [2021-03-11 15:54:23,275 INFO L147 QuantifierPusher]: treesize reduction 10, result has 88.2 percent of original size 75 [2021-03-11 15:54:23,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 15:54:23,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402433422] [2021-03-11 15:54:23,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 15:54:23,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-11 15:54:23,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878856213] [2021-03-11 15:54:23,338 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 15:54:23,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 15:54:23,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 15:54:23,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-11 15:54:23,339 INFO L87 Difference]: Start difference. First operand 19 states and 26 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 15:54:23,477 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-03-11 15:54:23,612 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-03-11 15:54:23,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 15:54:23,619 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2021-03-11 15:54:23,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 15:54:23,631 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-03-11 15:54:23,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 15:54:23,632 INFO L225 Difference]: With dead ends: 28 [2021-03-11 15:54:23,632 INFO L226 Difference]: Without dead ends: 22 [2021-03-11 15:54:23,632 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 459.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-11 15:54:23,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-03-11 15:54:23,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 17. [2021-03-11 15:54:23,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 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) [2021-03-11 15:54:23,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2021-03-11 15:54:23,634 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 10 [2021-03-11 15:54:23,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 15:54:23,634 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2021-03-11 15:54:23,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 15:54:23,634 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2021-03-11 15:54:23,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-03-11 15:54:23,635 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 15:54:23,635 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 15:54:23,635 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-11 15:54:23,635 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 15:54:23,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 15:54:23,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1006849840, now seen corresponding path program 4 times [2021-03-11 15:54:23,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 15:54:23,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024110094] [2021-03-11 15:54:23,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 15:54:23,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 15:54:23,660 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 15:54:23,660 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 15:54:23,667 INFO L142 QuantifierPusher]: treesize reduction 71, result has 45.8 percent of original size [2021-03-11 15:54:23,668 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 60 [2021-03-11 15:54:23,717 INFO L142 QuantifierPusher]: treesize reduction 124, result has 38.6 percent of original size [2021-03-11 15:54:23,718 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 78 [2021-03-11 15:54:23,765 INFO L142 QuantifierPusher]: treesize reduction 81, result has 42.1 percent of original size [2021-03-11 15:54:23,766 INFO L147 QuantifierPusher]: treesize reduction 6, result has 89.8 percent of original size 53 [2021-03-11 15:54:23,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 15:54:23,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024110094] [2021-03-11 15:54:23,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 15:54:23,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-11 15:54:23,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26144771] [2021-03-11 15:54:23,792 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 15:54:23,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 15:54:23,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 15:54:23,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-11 15:54:23,793 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 15:54:23,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 15:54:23,988 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2021-03-11 15:54:23,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 15:54:23,988 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-03-11 15:54:23,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 15:54:23,988 INFO L225 Difference]: With dead ends: 22 [2021-03-11 15:54:23,988 INFO L226 Difference]: Without dead ends: 16 [2021-03-11 15:54:23,989 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 281.1ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-11 15:54:23,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-03-11 15:54:23,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-03-11 15:54:23,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 15:54:23,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2021-03-11 15:54:23,990 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 10 [2021-03-11 15:54:23,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 15:54:23,990 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2021-03-11 15:54:23,990 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 15:54:23,990 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2021-03-11 15:54:23,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-03-11 15:54:23,991 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 15:54:23,991 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 15:54:23,991 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-11 15:54:23,991 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 15:54:23,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 15:54:23,991 INFO L82 PathProgramCache]: Analyzing trace with hash 147975310, now seen corresponding path program 5 times [2021-03-11 15:54:23,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 15:54:23,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798703192] [2021-03-11 15:54:23,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 15:54:24,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 15:54:24,034 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 15:54:24,034 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 15:54:24,036 INFO L142 QuantifierPusher]: treesize reduction 107, result has 34.0 percent of original size [2021-03-11 15:54:24,041 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 55 [2021-03-11 15:54:24,084 INFO L142 QuantifierPusher]: treesize reduction 135, result has 42.3 percent of original size [2021-03-11 15:54:24,085 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 99 [2021-03-11 15:54:24,136 INFO L142 QuantifierPusher]: treesize reduction 104, result has 36.6 percent of original size [2021-03-11 15:54:24,137 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 60 [2021-03-11 15:54:24,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 15:54:24,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798703192] [2021-03-11 15:54:24,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 15:54:24,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-11 15:54:24,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787151623] [2021-03-11 15:54:24,173 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 15:54:24,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 15:54:24,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 15:54:24,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-11 15:54:24,174 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 15:54:24,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 15:54:24,337 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2021-03-11 15:54:24,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 15:54:24,338 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-03-11 15:54:24,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 15:54:24,338 INFO L225 Difference]: With dead ends: 20 [2021-03-11 15:54:24,338 INFO L226 Difference]: Without dead ends: 15 [2021-03-11 15:54:24,338 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 255.1ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-11 15:54:24,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-03-11 15:54:24,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-03-11 15:54:24,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 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) [2021-03-11 15:54:24,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2021-03-11 15:54:24,340 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 10 [2021-03-11 15:54:24,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 15:54:24,340 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2021-03-11 15:54:24,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 15:54:24,340 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2021-03-11 15:54:24,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-03-11 15:54:24,340 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 15:54:24,340 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 15:54:24,340 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-11 15:54:24,341 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 15:54:24,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 15:54:24,341 INFO L82 PathProgramCache]: Analyzing trace with hash 175680940, now seen corresponding path program 6 times [2021-03-11 15:54:24,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 15:54:24,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145072255] [2021-03-11 15:54:24,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 15:54:24,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 15:54:24,362 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 15:54:24,363 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 15:54:24,364 INFO L142 QuantifierPusher]: treesize reduction 122, result has 27.4 percent of original size [2021-03-11 15:54:24,365 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 46 [2021-03-11 15:54:24,384 INFO L142 QuantifierPusher]: treesize reduction 143, result has 35.0 percent of original size [2021-03-11 15:54:24,385 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 77 [2021-03-11 15:54:24,443 INFO L142 QuantifierPusher]: treesize reduction 109, result has 29.7 percent of original size [2021-03-11 15:54:24,444 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 46 [2021-03-11 15:54:24,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 15:54:24,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145072255] [2021-03-11 15:54:24,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 15:54:24,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-11 15:54:24,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056813396] [2021-03-11 15:54:24,469 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 15:54:24,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 15:54:24,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 15:54:24,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-11 15:54:24,469 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 15:54:24,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 15:54:24,582 INFO L93 Difference]: Finished difference Result 14 states and 17 transitions. [2021-03-11 15:54:24,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 15:54:24,583 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-03-11 15:54:24,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 15:54:24,583 INFO L225 Difference]: With dead ends: 14 [2021-03-11 15:54:24,583 INFO L226 Difference]: Without dead ends: 0 [2021-03-11 15:54:24,583 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 199.6ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-11 15:54:24,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-03-11 15:54:24,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-03-11 15:54:24,583 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) [2021-03-11 15:54:24,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-03-11 15:54:24,583 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 10 [2021-03-11 15:54:24,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 15:54:24,584 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-03-11 15:54:24,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 15:54:24,584 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-03-11 15:54:24,584 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-03-11 15:54:24,584 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-11 15:54:24,586 INFO L202 PluginConnector]: Adding new model simpl-str-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.03 03:54:24 BasicIcfg [2021-03-11 15:54:24,586 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-11 15:54:24,587 INFO L168 Benchmark]: Toolchain (without parser) took 3160.23 ms. Allocated memory was 255.9 MB in the beginning and 369.1 MB in the end (delta: 113.2 MB). Free memory was 236.7 MB in the beginning and 286.3 MB in the end (delta: -49.6 MB). Peak memory consumption was 64.9 MB. Max. memory is 16.0 GB. [2021-03-11 15:54:24,587 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.08 ms. Allocated memory is still 255.9 MB. Free memory was 237.8 MB in the beginning and 237.7 MB in the end (delta: 157.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 15:54:24,587 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.86 ms. Allocated memory is still 255.9 MB. Free memory was 236.1 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. [2021-03-11 15:54:24,588 INFO L168 Benchmark]: Boogie Preprocessor took 14.47 ms. Allocated memory is still 255.9 MB. Free memory was 234.6 MB in the beginning and 233.7 MB in the end (delta: 938.0 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. [2021-03-11 15:54:24,588 INFO L168 Benchmark]: RCFGBuilder took 163.35 ms. Allocated memory is still 255.9 MB. Free memory was 233.5 MB in the beginning and 223.8 MB in the end (delta: 9.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. [2021-03-11 15:54:24,588 INFO L168 Benchmark]: TraceAbstraction took 2945.83 ms. Allocated memory was 255.9 MB in the beginning and 369.1 MB in the end (delta: 113.2 MB). Free memory was 241.1 MB in the beginning and 286.3 MB in the end (delta: -45.3 MB). Peak memory consumption was 67.6 MB. Max. memory is 16.0 GB. [2021-03-11 15:54:24,589 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 0.08 ms. Allocated memory is still 255.9 MB. Free memory was 237.8 MB in the beginning and 237.7 MB in the end (delta: 157.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 19.86 ms. Allocated memory is still 255.9 MB. Free memory was 236.1 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 14.47 ms. Allocated memory is still 255.9 MB. Free memory was 234.6 MB in the beginning and 233.7 MB in the end (delta: 938.0 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. * RCFGBuilder took 163.35 ms. Allocated memory is still 255.9 MB. Free memory was 233.5 MB in the beginning and 223.8 MB in the end (delta: 9.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. * TraceAbstraction took 2945.83 ms. Allocated memory was 255.9 MB in the beginning and 369.1 MB in the end (delta: 113.2 MB). Free memory was 241.1 MB in the beginning and 286.3 MB in the end (delta: -45.3 MB). Peak memory consumption was 67.6 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 174.4ms, 29 PlacesBefore, 24 PlacesAfterwards, 19 TransitionsBefore, 14 TransitionsAfterwards, 48 CoEnabledTransitionPairs, 2 FixpointIterations, 3 TrivialSequentialCompositions, 3 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 6 TotalNumberOfCompositions, 54 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 54, positive: 54, positive conditional: 0, positive unconditional: 54, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 34, positive: 34, positive conditional: 0, positive unconditional: 34, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 34, positive: 34, positive conditional: 0, positive unconditional: 34, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 54, positive: 20, positive conditional: 0, positive unconditional: 20, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 34, unknown conditional: 0, unknown unconditional: 34] , Statistics on independence cache: Total cache size (in pairs): 12, Positive cache size: 12, Positive conditional cache size: 0, Positive unconditional cache size: 12, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - PositiveResult [Line: 47]: 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, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2847.0ms, OverallIterations: 6, TraceHistogramMax: 1, EmptinessCheckTime: 11.1ms, AutomataDifference: 1102.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 216.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 72 SDtfs, 94 SDslu, 115 SDs, 0 SdLazy, 81 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 93.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 37 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1691.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=0, InterpolantAutomatonStates: 30, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 24.6ms AutomataMinimizationTime, 6 MinimizatonAttempts, 15 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 7.8ms SsaConstructionTime, 110.2ms SatisfiabilityAnalysisTime, 1267.5ms InterpolantComputationTime, 60 NumberOfCodeBlocks, 60 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 54 ConstructedInterpolants, 0 QuantifiedInterpolants, 1630 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...