/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/container-trans.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d47b94137d5c7dd60722882962a90fb345e61909-d47b941 [2021-05-03 14:34:47,069 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-03 14:34:47,073 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-03 14:34:47,129 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-03 14:34:47,212 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-03 14:34:47,213 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-03 14:34:47,213 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-03 14:34:47,218 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 [2021-05-03 14:34:47,249 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-03 14:34:47,250 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-03 14:34:47,250 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-03 14:34:47,250 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-03 14:34:47,252 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-03 14:34:47,252 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-03 14:34:47,252 INFO L138 SettingsManager]: * Use SBE=true [2021-05-03 14:34:47,253 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-03 14:34:47,253 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-03 14:34:47,253 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-03 14:34:47,253 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-03 14:34:47,253 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-03 14:34:47,253 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-03 14:34:47,254 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-03 14:34:47,254 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-03 14:34:47,254 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-03 14:34:47,254 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-03 14:34:47,254 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-03 14:34:47,254 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-03 14:34:47,255 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-03 14:34:47,255 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-03 14:34:47,255 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-03 14:34:47,255 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-03 14:34:47,255 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 14:34:47,255 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-03 14:34:47,256 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-03 14:34:47,256 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-03 14:34:47,256 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-03 14:34:47,256 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-03 14:34:47,256 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-03 14:34:47,256 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-03 14:34:47,256 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-03 14:34:47,628 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-03 14:34:47,664 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-03 14:34:47,668 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-03 14:34:47,670 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-03 14:34:47,671 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-03 14:34:47,672 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/container-trans.wvr.bpl [2021-05-03 14:34:47,673 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/container-trans.wvr.bpl' [2021-05-03 14:34:47,740 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-03 14:34:47,742 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-03 14:34:47,744 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-03 14:34:47,744 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-03 14:34:47,744 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-03 14:34:47,758 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "container-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:34:47" (1/1) ... [2021-05-03 14:34:47,769 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "container-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:34:47" (1/1) ... [2021-05-03 14:34:47,778 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-03 14:34:47,780 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-03 14:34:47,780 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-03 14:34:47,780 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-03 14:34:47,789 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "container-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:34:47" (1/1) ... [2021-05-03 14:34:47,790 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "container-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:34:47" (1/1) ... [2021-05-03 14:34:47,791 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "container-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:34:47" (1/1) ... [2021-05-03 14:34:47,791 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "container-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:34:47" (1/1) ... [2021-05-03 14:34:47,795 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "container-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:34:47" (1/1) ... [2021-05-03 14:34:47,796 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "container-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:34:47" (1/1) ... [2021-05-03 14:34:47,798 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "container-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:34:47" (1/1) ... [2021-05-03 14:34:47,801 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-03 14:34:47,803 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-03 14:34:47,803 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-03 14:34:47,803 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-03 14:34:47,811 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "container-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:34:47" (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 [2021-05-03 14:34:47,885 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-03 14:34:47,886 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-03 14:34:47,886 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-03 14:34:47,886 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-03 14:34:47,886 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-03 14:34:47,886 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-03 14:34:47,886 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-03 14:34:47,887 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-03 14:34:47,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-03 14:34:47,887 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-05-03 14:34:47,887 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-05-03 14:34:47,887 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-05-03 14:34:47,888 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-03 14:34:48,357 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-03 14:34:48,358 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-03 14:34:48,360 INFO L202 PluginConnector]: Adding new model container-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 02:34:48 BoogieIcfgContainer [2021-05-03 14:34:48,361 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-03 14:34:48,362 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-03 14:34:48,362 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-03 14:34:48,365 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-03 14:34:48,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "container-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:34:47" (1/2) ... [2021-05-03 14:34:48,366 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68995f01 and model type container-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 02:34:48, skipping insertion in model container [2021-05-03 14:34:48,367 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "container-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 02:34:48" (2/2) ... [2021-05-03 14:34:48,368 INFO L111 eAbstractionObserver]: Analyzing ICFG container-trans.wvr.bpl [2021-05-03 14:34:48,391 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-03 14:34:48,391 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-03 14:34:48,405 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-03 14:34:48,406 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-03 14:34:48,501 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-05-03 14:34:48,523 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-05-03 14:34:48,562 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-03 14:34:48,562 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-03 14:34:48,562 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-03 14:34:48,563 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-03 14:34:48,563 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-03 14:34:48,563 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-03 14:34:48,563 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-03 14:34:48,563 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-03 14:34:48,579 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 29 places, 19 transitions, 62 flow [2021-05-03 14:34:48,602 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 57 states, 55 states have (on average 2.036363636363636) internal successors, (112), 56 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:48,606 INFO L276 IsEmpty]: Start isEmpty. Operand has 57 states, 55 states have (on average 2.036363636363636) internal successors, (112), 56 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:48,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:34:48,614 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:34:48,616 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:34:48,617 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:34:48,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:34:48,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1365396696, now seen corresponding path program 1 times [2021-05-03 14:34:48,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:34:48,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096096403] [2021-05-03 14:34:48,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:34:48,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:34:50,209 WARN L205 SmtUtils]: Spent 860.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 210 [2021-05-03 14:34:50,889 WARN L205 SmtUtils]: Spent 574.00 ms on a formula simplification. DAG size of input: 199 DAG size of output: 41 [2021-05-03 14:34:51,544 WARN L205 SmtUtils]: Spent 637.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 207 [2021-05-03 14:34:52,189 WARN L205 SmtUtils]: Spent 574.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 49 [2021-05-03 14:34:52,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:52,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096096403] [2021-05-03 14:34:52,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:34:52,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-03 14:34:52,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713657190] [2021-05-03 14:34:52,241 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 14:34:52,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:34:52,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 14:34:52,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-03 14:34:52,271 INFO L87 Difference]: Start difference. First operand has 57 states, 55 states have (on average 2.036363636363636) internal successors, (112), 56 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:52,547 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-05-03 14:34:52,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:34:52,559 INFO L93 Difference]: Finished difference Result 98 states and 183 transitions. [2021-05-03 14:34:52,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 14:34:52,561 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-03 14:34:52,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:34:52,570 INFO L225 Difference]: With dead ends: 98 [2021-05-03 14:34:52,570 INFO L226 Difference]: Without dead ends: 72 [2021-05-03 14:34:52,572 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1444.6ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:34:52,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-05-03 14:34:52,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 55. [2021-05-03 14:34:52,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.9444444444444444) internal successors, (105), 54 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:52,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 105 transitions. [2021-05-03 14:34:52,617 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 105 transitions. Word has length 14 [2021-05-03 14:34:52,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:34:52,618 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 105 transitions. [2021-05-03 14:34:52,618 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:52,618 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 105 transitions. [2021-05-03 14:34:52,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:34:52,620 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:34:52,620 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:34:52,621 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-03 14:34:52,622 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:34:52,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:34:52,626 INFO L82 PathProgramCache]: Analyzing trace with hash -39432920, now seen corresponding path program 2 times [2021-05-03 14:34:52,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:34:52,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029335107] [2021-05-03 14:34:52,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:34:52,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:34:52,968 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 35 [2021-05-03 14:34:53,151 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 37 [2021-05-03 14:34:53,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:53,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029335107] [2021-05-03 14:34:53,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:34:53,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-03 14:34:53,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529289221] [2021-05-03 14:34:53,175 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 14:34:53,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:34:53,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 14:34:53,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-03 14:34:53,177 INFO L87 Difference]: Start difference. First operand 55 states and 105 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:53,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:34:53,347 INFO L93 Difference]: Finished difference Result 93 states and 168 transitions. [2021-05-03 14:34:53,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 14:34:53,348 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-03 14:34:53,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:34:53,349 INFO L225 Difference]: With dead ends: 93 [2021-05-03 14:34:53,349 INFO L226 Difference]: Without dead ends: 65 [2021-05-03 14:34:53,350 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 471.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:34:53,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-03 14:34:53,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 48. [2021-05-03 14:34:53,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 47 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:53,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 91 transitions. [2021-05-03 14:34:53,357 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 91 transitions. Word has length 14 [2021-05-03 14:34:53,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:34:53,357 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 91 transitions. [2021-05-03 14:34:53,357 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:53,358 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 91 transitions. [2021-05-03 14:34:53,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:34:53,358 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:34:53,358 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:34:53,359 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-03 14:34:53,359 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:34:53,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:34:53,360 INFO L82 PathProgramCache]: Analyzing trace with hash -392767192, now seen corresponding path program 3 times [2021-05-03 14:34:53,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:34:53,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951417614] [2021-05-03 14:34:53,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:34:53,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:34:53,723 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 37 [2021-05-03 14:34:54,011 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 179 [2021-05-03 14:34:54,507 WARN L205 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 52 [2021-05-03 14:34:54,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:54,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951417614] [2021-05-03 14:34:54,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:34:54,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-03 14:34:54,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923210321] [2021-05-03 14:34:54,537 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 14:34:54,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:34:54,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 14:34:54,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-03 14:34:54,538 INFO L87 Difference]: Start difference. First operand 48 states and 91 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:54,665 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-05-03 14:34:54,800 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-05-03 14:34:54,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:34:54,812 INFO L93 Difference]: Finished difference Result 80 states and 141 transitions. [2021-05-03 14:34:54,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 14:34:54,815 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-03 14:34:54,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:34:54,816 INFO L225 Difference]: With dead ends: 80 [2021-05-03 14:34:54,816 INFO L226 Difference]: Without dead ends: 54 [2021-05-03 14:34:54,816 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 851.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:34:54,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-03 14:34:54,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 37. [2021-05-03 14:34:54,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 36 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:54,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 64 transitions. [2021-05-03 14:34:54,820 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 64 transitions. Word has length 14 [2021-05-03 14:34:54,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:34:54,821 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 64 transitions. [2021-05-03 14:34:54,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:54,821 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 64 transitions. [2021-05-03 14:34:54,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:34:54,821 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:34:54,822 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:34:54,822 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-03 14:34:54,822 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:34:54,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:34:54,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1324864438, now seen corresponding path program 4 times [2021-05-03 14:34:54,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:34:54,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472767080] [2021-05-03 14:34:54,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:34:54,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:34:55,138 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 35 [2021-05-03 14:34:55,436 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 45 [2021-05-03 14:34:55,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:55,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472767080] [2021-05-03 14:34:55,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:34:55,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-03 14:34:55,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421648497] [2021-05-03 14:34:55,477 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 14:34:55,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:34:55,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 14:34:55,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-03 14:34:55,478 INFO L87 Difference]: Start difference. First operand 37 states and 64 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:55,658 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2021-05-03 14:34:55,853 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 78 [2021-05-03 14:34:55,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:34:55,870 INFO L93 Difference]: Finished difference Result 56 states and 96 transitions. [2021-05-03 14:34:55,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 14:34:55,871 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-03 14:34:55,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:34:55,871 INFO L225 Difference]: With dead ends: 56 [2021-05-03 14:34:55,871 INFO L226 Difference]: Without dead ends: 33 [2021-05-03 14:34:55,872 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 772.6ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:34:55,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-03 14:34:55,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-03 14:34:55,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.75) internal successors, (56), 32 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:55,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 56 transitions. [2021-05-03 14:34:55,876 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 56 transitions. Word has length 14 [2021-05-03 14:34:55,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:34:55,876 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 56 transitions. [2021-05-03 14:34:55,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:55,876 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 56 transitions. [2021-05-03 14:34:55,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:34:55,877 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:34:55,877 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:34:55,877 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-03 14:34:55,877 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:34:55,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:34:55,878 INFO L82 PathProgramCache]: Analyzing trace with hash -2000333238, now seen corresponding path program 5 times [2021-05-03 14:34:55,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:34:55,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52680826] [2021-05-03 14:34:55,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:34:55,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:34:56,525 WARN L205 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 42 [2021-05-03 14:34:56,688 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 55 [2021-05-03 14:34:56,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:56,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52680826] [2021-05-03 14:34:56,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:34:56,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-03 14:34:56,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360902226] [2021-05-03 14:34:56,709 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 14:34:56,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:34:56,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 14:34:56,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-03 14:34:56,710 INFO L87 Difference]: Start difference. First operand 33 states and 56 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:56,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:34:56,926 INFO L93 Difference]: Finished difference Result 48 states and 80 transitions. [2021-05-03 14:34:56,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 14:34:56,927 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-03 14:34:56,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:34:56,927 INFO L225 Difference]: With dead ends: 48 [2021-05-03 14:34:56,927 INFO L226 Difference]: Without dead ends: 27 [2021-05-03 14:34:56,928 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 784.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:34:56,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-03 14:34:56,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-03 14:34:56,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:56,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 41 transitions. [2021-05-03 14:34:56,931 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 41 transitions. Word has length 14 [2021-05-03 14:34:56,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:34:56,931 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 41 transitions. [2021-05-03 14:34:56,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:56,932 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 41 transitions. [2021-05-03 14:34:56,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:34:56,932 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:34:56,944 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:34:56,945 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-03 14:34:56,945 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:34:56,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:34:56,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1966251176, now seen corresponding path program 6 times [2021-05-03 14:34:56,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:34:56,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217375620] [2021-05-03 14:34:56,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:34:56,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:34:57,591 WARN L205 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 55 [2021-05-03 14:34:57,795 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 48 [2021-05-03 14:34:57,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:57,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217375620] [2021-05-03 14:34:57,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:34:57,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-03 14:34:57,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966029035] [2021-05-03 14:34:57,817 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 14:34:57,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:34:57,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 14:34:57,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-03 14:34:57,819 INFO L87 Difference]: Start difference. First operand 27 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:58,091 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 84 [2021-05-03 14:34:58,357 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 91 [2021-05-03 14:34:58,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:34:58,360 INFO L93 Difference]: Finished difference Result 25 states and 39 transitions. [2021-05-03 14:34:58,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 14:34:58,360 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-03 14:34:58,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:34:58,361 INFO L225 Difference]: With dead ends: 25 [2021-05-03 14:34:58,361 INFO L226 Difference]: Without dead ends: 0 [2021-05-03 14:34:58,361 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1214.2ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-03 14:34:58,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-03 14:34:58,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-03 14:34:58,362 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) [2021-05-03 14:34:58,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-03 14:34:58,362 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2021-05-03 14:34:58,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:34:58,362 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-03 14:34:58,362 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:58,362 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-03 14:34:58,363 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-03 14:34:58,363 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-03 14:34:58,368 INFO L202 PluginConnector]: Adding new model container-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.05 02:34:58 BasicIcfg [2021-05-03 14:34:58,368 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-03 14:34:58,369 INFO L168 Benchmark]: Toolchain (without parser) took 10627.45 ms. Allocated memory was 352.3 MB in the beginning and 534.8 MB in the end (delta: 182.5 MB). Free memory was 332.2 MB in the beginning and 230.4 MB in the end (delta: 101.9 MB). Peak memory consumption was 285.1 MB. Max. memory is 16.0 GB. [2021-05-03 14:34:58,370 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.15 ms. Allocated memory is still 352.3 MB. Free memory was 333.4 MB in the beginning and 333.3 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-03 14:34:58,370 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.71 ms. Allocated memory is still 352.3 MB. Free memory was 332.2 MB in the beginning and 330.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-03 14:34:58,371 INFO L168 Benchmark]: Boogie Preprocessor took 22.28 ms. Allocated memory is still 352.3 MB. Free memory was 330.7 MB in the beginning and 329.8 MB in the end (delta: 923.9 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-03 14:34:58,371 INFO L168 Benchmark]: RCFGBuilder took 557.94 ms. Allocated memory is still 352.3 MB. Free memory was 329.7 MB in the beginning and 312.6 MB in the end (delta: 17.1 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.0 GB. [2021-05-03 14:34:58,372 INFO L168 Benchmark]: TraceAbstraction took 10006.21 ms. Allocated memory was 352.3 MB in the beginning and 534.8 MB in the end (delta: 182.5 MB). Free memory was 312.2 MB in the beginning and 230.4 MB in the end (delta: 81.8 MB). Peak memory consumption was 264.1 MB. Max. memory is 16.0 GB. [2021-05-03 14:34:58,374 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 0.15 ms. Allocated memory is still 352.3 MB. Free memory was 333.4 MB in the beginning and 333.3 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 34.71 ms. Allocated memory is still 352.3 MB. Free memory was 332.2 MB in the beginning and 330.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 22.28 ms. Allocated memory is still 352.3 MB. Free memory was 330.7 MB in the beginning and 329.8 MB in the end (delta: 923.9 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 557.94 ms. Allocated memory is still 352.3 MB. Free memory was 329.7 MB in the beginning and 312.6 MB in the end (delta: 17.1 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.0 GB. * TraceAbstraction took 10006.21 ms. Allocated memory was 352.3 MB in the beginning and 534.8 MB in the end (delta: 182.5 MB). Free memory was 312.2 MB in the beginning and 230.4 MB in the end (delta: 81.8 MB). Peak memory consumption was 264.1 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 68]: 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: 9803.6ms, OverallIterations: 6, TraceHistogramMax: 1, EmptinessCheckTime: 15.6ms, AutomataDifference: 1937.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 39.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 119 SDtfs, 147 SDslu, 177 SDs, 0 SdLazy, 80 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 130.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5539.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=57occurred in iteration=0, InterpolantAutomatonStates: 30, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 49.8ms AutomataMinimizationTime, 6 MinimizatonAttempts, 51 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 26.6ms SsaConstructionTime, 278.1ms SatisfiabilityAnalysisTime, 7249.4ms InterpolantComputationTime, 84 NumberOfCodeBlocks, 84 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 78 ConstructedInterpolants, 0 QuantifiedInterpolants, 2439 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...