/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe-OGIterative-CovSimpl-Hitting.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/regression/ForkInLoop02-Incrementer.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2cf4d3f9dd5fed411db405f577e28237a543b59a-2cf4d3f [2021-08-13 17:52:05,601 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-13 17:52:05,603 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-13 17:52:05,635 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-13 17:52:05,701 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-PN-NoLbe-OGIterative-CovSimpl-Hitting.epf [2021-08-13 17:52:05,744 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-13 17:52:05,744 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-13 17:52:05,748 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-13 17:52:05,748 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-13 17:52:05,748 INFO L138 SettingsManager]: * Use SBE=true [2021-08-13 17:52:05,748 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-13 17:52:05,749 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-13 17:52:05,749 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-13 17:52:05,749 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-13 17:52:05,749 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-13 17:52:05,750 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-13 17:52:05,750 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-13 17:52:05,750 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-13 17:52:05,750 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-13 17:52:05,751 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-13 17:52:05,751 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-13 17:52:05,751 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-13 17:52:05,751 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-13 17:52:05,751 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-13 17:52:05,751 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-13 17:52:05,751 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-13 17:52:05,752 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-13 17:52:05,752 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-13 17:52:05,752 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-13 17:52:05,752 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-13 17:52:05,752 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-13 17:52:05,752 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-13 17:52:05,753 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-13 17:52:05,753 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-08-13 17:52:05,753 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-13 17:52:05,753 INFO L138 SettingsManager]: * Compute cosets for OwickiGries annotation iteratively=true [2021-08-13 17:52:05,753 INFO L138 SettingsManager]: * Use hitting sets in computation of OwickiGries annotation=true [2021-08-13 17:52:05,753 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-08-13 17:52:05,753 INFO L138 SettingsManager]: * Simplify away covered predicates in OwickiGries annotation=true 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-13 17:52:06,079 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-13 17:52:06,109 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-13 17:52:06,112 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-13 17:52:06,113 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-13 17:52:06,114 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-13 17:52:06,115 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/ForkInLoop02-Incrementer.bpl [2021-08-13 17:52:06,115 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/ForkInLoop02-Incrementer.bpl' [2021-08-13 17:52:06,138 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-13 17:52:06,140 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-13 17:52:06,142 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-13 17:52:06,142 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-13 17:52:06,143 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-13 17:52:06,155 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 05:52:06" (1/1) ... [2021-08-13 17:52:06,162 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 05:52:06" (1/1) ... [2021-08-13 17:52:06,170 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-13 17:52:06,171 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-13 17:52:06,172 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-13 17:52:06,172 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-13 17:52:06,180 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 05:52:06" (1/1) ... [2021-08-13 17:52:06,180 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 05:52:06" (1/1) ... [2021-08-13 17:52:06,180 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 05:52:06" (1/1) ... [2021-08-13 17:52:06,181 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 05:52:06" (1/1) ... [2021-08-13 17:52:06,184 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 05:52:06" (1/1) ... [2021-08-13 17:52:06,187 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 05:52:06" (1/1) ... [2021-08-13 17:52:06,187 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 05:52:06" (1/1) ... [2021-08-13 17:52:06,188 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-13 17:52:06,189 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-13 17:52:06,189 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-13 17:52:06,189 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-13 17:52:06,190 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 05:52:06" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-13 17:52:06,270 INFO L124 BoogieDeclarations]: Specification and implementation of procedure foo given in one single declaration [2021-08-13 17:52:06,271 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2021-08-13 17:52:06,271 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2021-08-13 17:52:06,271 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-13 17:52:06,271 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-13 17:52:06,272 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-13 17:52:06,407 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-13 17:52:06,407 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-08-13 17:52:06,408 INFO L202 PluginConnector]: Adding new model ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.08 05:52:06 BoogieIcfgContainer [2021-08-13 17:52:06,408 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-13 17:52:06,410 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-13 17:52:06,410 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-13 17:52:06,413 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-13 17:52:06,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 05:52:06" (1/2) ... [2021-08-13 17:52:06,415 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2881814e and model type ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.08 05:52:06, skipping insertion in model container [2021-08-13 17:52:06,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.08 05:52:06" (2/2) ... [2021-08-13 17:52:06,416 INFO L111 eAbstractionObserver]: Analyzing ICFG ForkInLoop02-Incrementer.bpl [2021-08-13 17:52:06,426 INFO L206 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-13 17:52:06,427 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-13 17:52:06,428 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-13 17:52:06,451 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 17:52:06,470 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-13 17:52:06,490 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 17:52:06,490 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 17:52:06,490 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 17:52:06,490 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 17:52:06,491 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 17:52:06,491 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 17:52:06,491 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 17:52:06,491 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 17:52:06,500 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 13 places, 10 transitions, 25 flow [2021-08-13 17:52:06,514 INFO L129 PetriNetUnfolder]: 0/11 cut-off events. [2021-08-13 17:52:06,514 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 17:52:06,516 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16 conditions, 11 events. 0/11 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 10 event pairs, 0 based on Foata normal form. 0/10 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-08-13 17:52:06,516 INFO L82 GeneralOperation]: Start removeDead. Operand has 13 places, 10 transitions, 25 flow [2021-08-13 17:52:06,520 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 13 places, 10 transitions, 25 flow [2021-08-13 17:52:06,524 INFO L129 PetriNetUnfolder]: 0/7 cut-off events. [2021-08-13 17:52:06,524 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 17:52:06,524 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 17:52:06,525 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2021-08-13 17:52:06,525 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-08-13 17:52:06,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 17:52:06,530 INFO L82 PathProgramCache]: Analyzing trace with hash 42091544, now seen corresponding path program 1 times [2021-08-13 17:52:06,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 17:52:06,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69601764] [2021-08-13 17:52:06,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 17:52:06,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 17:52:06,632 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:06,633 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 17:52:06,634 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:06,635 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:52:06,645 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:06,645 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:52:06,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 17:52:06,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 17:52:06,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69601764] [2021-08-13 17:52:06,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69601764] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 17:52:06,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 17:52:06,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-13 17:52:06,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905084792] [2021-08-13 17:52:06,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-13 17:52:06,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 17:52:06,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-13 17:52:06,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-13 17:52:06,675 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 10 [2021-08-13 17:52:06,678 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 13 places, 10 transitions, 25 flow. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 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) [2021-08-13 17:52:06,678 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 17:52:06,678 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 10 [2021-08-13 17:52:06,679 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 17:52:06,696 INFO L129 PetriNetUnfolder]: 0/10 cut-off events. [2021-08-13 17:52:06,697 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 17:52:06,697 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19 conditions, 10 events. 0/10 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 9 event pairs, 0 based on Foata normal form. 0/10 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-08-13 17:52:06,698 INFO L132 encePairwiseOnDemand]: 7/10 looper letters, 1 selfloop transitions, 2 changer transitions 1/9 dead transitions. [2021-08-13 17:52:06,698 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 15 places, 9 transitions, 29 flow [2021-08-13 17:52:06,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-13 17:52:06,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-08-13 17:52:06,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 28 transitions. [2021-08-13 17:52:06,708 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.7 [2021-08-13 17:52:06,708 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 28 transitions. [2021-08-13 17:52:06,708 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 28 transitions. [2021-08-13 17:52:06,709 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 17:52:06,711 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 28 transitions. [2021-08-13 17:52:06,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 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) [2021-08-13 17:52:06,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 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) [2021-08-13 17:52:06,715 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 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) [2021-08-13 17:52:06,716 INFO L348 CegarLoopForPetriNet]: 13 programPoint places, 2 predicate places. [2021-08-13 17:52:06,716 INFO L482 AbstractCegarLoop]: Abstraction has has 15 places, 9 transitions, 29 flow [2021-08-13 17:52:06,716 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 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) [2021-08-13 17:52:06,717 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 17:52:06,717 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2021-08-13 17:52:06,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-13 17:52:06,717 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-08-13 17:52:06,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 17:52:06,718 INFO L82 PathProgramCache]: Analyzing trace with hash 42091268, now seen corresponding path program 1 times [2021-08-13 17:52:06,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 17:52:06,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429605869] [2021-08-13 17:52:06,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 17:52:06,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 17:52:06,724 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 17:52:06,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 17:52:06,728 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 17:52:06,740 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 17:52:06,740 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 17:52:06,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-13 17:52:06,742 WARN L235 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 17:52:06,742 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2021-08-13 17:52:06,748 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 17:52:06,748 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-13 17:52:06,751 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 17:52:06,751 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 17:52:06,765 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 17:52:06,765 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 17:52:06,765 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 17:52:06,765 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 17:52:06,766 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 17:52:06,766 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 17:52:06,767 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 20 places, 15 transitions, 42 flow [2021-08-13 17:52:06,772 INFO L129 PetriNetUnfolder]: 0/18 cut-off events. [2021-08-13 17:52:06,772 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-08-13 17:52:06,773 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 18 events. 0/18 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 31 event pairs, 0 based on Foata normal form. 0/16 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-08-13 17:52:06,773 INFO L82 GeneralOperation]: Start removeDead. Operand has 20 places, 15 transitions, 42 flow [2021-08-13 17:52:06,773 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 20 places, 15 transitions, 42 flow [2021-08-13 17:52:06,782 INFO L129 PetriNetUnfolder]: 0/9 cut-off events. [2021-08-13 17:52:06,783 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-08-13 17:52:06,783 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 17:52:06,783 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2021-08-13 17:52:06,783 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 17:52:06,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 17:52:06,784 INFO L82 PathProgramCache]: Analyzing trace with hash 56409963, now seen corresponding path program 1 times [2021-08-13 17:52:06,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 17:52:06,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603240361] [2021-08-13 17:52:06,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 17:52:06,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 17:52:06,809 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:06,810 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 17:52:06,811 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:06,811 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:52:06,819 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:06,820 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:52:06,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 17:52:06,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 17:52:06,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603240361] [2021-08-13 17:52:06,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603240361] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 17:52:06,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 17:52:06,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-13 17:52:06,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845308277] [2021-08-13 17:52:06,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-13 17:52:06,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 17:52:06,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-13 17:52:06,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-13 17:52:06,850 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 15 [2021-08-13 17:52:06,851 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 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) [2021-08-13 17:52:06,851 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 17:52:06,851 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 15 [2021-08-13 17:52:06,851 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 17:52:06,898 INFO L129 PetriNetUnfolder]: 7/34 cut-off events. [2021-08-13 17:52:06,898 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-08-13 17:52:06,900 INFO L84 FinitePrefix]: Finished finitePrefix Result has 66 conditions, 34 events. 7/34 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 76 event pairs, 2 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 46. Up to 17 conditions per place. [2021-08-13 17:52:06,900 INFO L132 encePairwiseOnDemand]: 10/15 looper letters, 6 selfloop transitions, 5 changer transitions 0/19 dead transitions. [2021-08-13 17:52:06,900 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 19 transitions, 72 flow [2021-08-13 17:52:06,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-13 17:52:06,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-08-13 17:52:06,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 45 transitions. [2021-08-13 17:52:06,907 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.75 [2021-08-13 17:52:06,907 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 45 transitions. [2021-08-13 17:52:06,907 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 45 transitions. [2021-08-13 17:52:06,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 17:52:06,908 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 45 transitions. [2021-08-13 17:52:06,909 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 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) [2021-08-13 17:52:06,911 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 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) [2021-08-13 17:52:06,911 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 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) [2021-08-13 17:52:06,911 INFO L348 CegarLoopForPetriNet]: 20 programPoint places, 3 predicate places. [2021-08-13 17:52:06,912 INFO L482 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 72 flow [2021-08-13 17:52:06,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 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) [2021-08-13 17:52:06,913 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 17:52:06,913 INFO L266 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2021-08-13 17:52:06,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-13 17:52:06,913 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 17:52:06,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 17:52:06,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1624858962, now seen corresponding path program 1 times [2021-08-13 17:52:06,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 17:52:06,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277469184] [2021-08-13 17:52:06,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 17:52:06,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 17:52:06,926 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 17:52:06,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 17:52:06,930 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 17:52:06,932 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 17:52:06,932 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 17:52:06,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-13 17:52:06,935 WARN L235 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 17:52:06,935 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2021-08-13 17:52:06,947 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 17:52:06,948 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-08-13 17:52:06,951 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 17:52:06,951 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 17:52:06,951 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 17:52:06,951 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 17:52:06,952 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 17:52:06,952 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 17:52:06,952 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 17:52:06,952 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 17:52:06,955 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 27 places, 20 transitions, 61 flow [2021-08-13 17:52:06,968 INFO L129 PetriNetUnfolder]: 0/25 cut-off events. [2021-08-13 17:52:06,968 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2021-08-13 17:52:06,969 INFO L84 FinitePrefix]: Finished finitePrefix Result has 41 conditions, 25 events. 0/25 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 38 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2021-08-13 17:52:06,969 INFO L82 GeneralOperation]: Start removeDead. Operand has 27 places, 20 transitions, 61 flow [2021-08-13 17:52:06,969 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 27 places, 20 transitions, 61 flow [2021-08-13 17:52:06,977 INFO L129 PetriNetUnfolder]: 0/9 cut-off events. [2021-08-13 17:52:06,977 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-08-13 17:52:06,977 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 17:52:06,977 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2021-08-13 17:52:06,978 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-08-13 17:52:06,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 17:52:06,979 INFO L82 PathProgramCache]: Analyzing trace with hash 75500163, now seen corresponding path program 1 times [2021-08-13 17:52:06,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 17:52:06,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097542925] [2021-08-13 17:52:06,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 17:52:06,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 17:52:07,009 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:07,010 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 17:52:07,011 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:07,011 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:52:07,019 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:07,020 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:52:07,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 17:52:07,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 17:52:07,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097542925] [2021-08-13 17:52:07,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097542925] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 17:52:07,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 17:52:07,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-13 17:52:07,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870183812] [2021-08-13 17:52:07,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-13 17:52:07,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 17:52:07,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-13 17:52:07,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-13 17:52:07,031 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 20 [2021-08-13 17:52:07,032 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 20 transitions, 61 flow. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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) [2021-08-13 17:52:07,032 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 17:52:07,032 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 20 [2021-08-13 17:52:07,032 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 17:52:07,143 INFO L129 PetriNetUnfolder]: 75/170 cut-off events. [2021-08-13 17:52:07,143 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2021-08-13 17:52:07,146 INFO L84 FinitePrefix]: Finished finitePrefix Result has 323 conditions, 170 events. 75/170 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 695 event pairs, 33 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 294. Up to 130 conditions per place. [2021-08-13 17:52:07,154 INFO L132 encePairwiseOnDemand]: 13/20 looper letters, 12 selfloop transitions, 7 changer transitions 0/29 dead transitions. [2021-08-13 17:52:07,155 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 29 transitions, 117 flow [2021-08-13 17:52:07,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-13 17:52:07,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-08-13 17:52:07,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 62 transitions. [2021-08-13 17:52:07,158 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.775 [2021-08-13 17:52:07,159 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 62 transitions. [2021-08-13 17:52:07,159 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 62 transitions. [2021-08-13 17:52:07,160 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 17:52:07,160 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 62 transitions. [2021-08-13 17:52:07,162 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 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) [2021-08-13 17:52:07,164 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 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) [2021-08-13 17:52:07,164 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 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) [2021-08-13 17:52:07,164 INFO L348 CegarLoopForPetriNet]: 27 programPoint places, 3 predicate places. [2021-08-13 17:52:07,164 INFO L482 AbstractCegarLoop]: Abstraction has has 30 places, 29 transitions, 117 flow [2021-08-13 17:52:07,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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) [2021-08-13 17:52:07,165 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 17:52:07,165 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 17:52:07,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-13 17:52:07,165 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-08-13 17:52:07,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 17:52:07,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1337973353, now seen corresponding path program 1 times [2021-08-13 17:52:07,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 17:52:07,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008249333] [2021-08-13 17:52:07,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 17:52:07,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 17:52:07,196 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:07,196 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 17:52:07,198 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:07,199 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:52:07,203 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:07,206 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:52:07,211 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:07,213 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:52:07,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 17:52:07,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 17:52:07,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008249333] [2021-08-13 17:52:07,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008249333] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-13 17:52:07,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494768680] [2021-08-13 17:52:07,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-13 17:52:07,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 17:52:07,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-13 17:52:07,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-13 17:52:07,269 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:07,269 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 17:52:07,270 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:07,270 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 17:52:07,271 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:07,271 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 17:52:07,272 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:07,272 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 17:52:07,273 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:07,273 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:52:07,274 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:07,274 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:52:07,275 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:07,276 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:52:07,276 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:07,277 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:52:07,278 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:07,278 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:52:07,279 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:07,279 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:52:07,279 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:07,280 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:52:07,280 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:07,281 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:52:07,289 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:07,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-08-13 17:52:07,306 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:07,307 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-08-13 17:52:07,308 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-08-13 17:52:07,317 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:07,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-08-13 17:52:07,321 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:07,326 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-08-13 17:52:07,329 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-08-13 17:52:07,331 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:07,339 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:52:07,340 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:07,340 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:52:07,341 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:07,341 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:52:07,342 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:07,343 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:52:07,343 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:07,344 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:52:07,344 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:07,345 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:52:07,345 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:07,346 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:52:07,346 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:07,347 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:52:07,347 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:07,348 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:52:07,348 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:07,348 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:52:07,365 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:07,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-08-13 17:52:07,377 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:07,378 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-08-13 17:52:07,379 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-08-13 17:52:07,381 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:07,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-08-13 17:52:07,385 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:07,386 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-08-13 17:52:07,387 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-08-13 17:52:07,390 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:07,392 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:52:07,392 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:07,392 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:52:07,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 17:52:07,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494768680] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-13 17:52:07,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-13 17:52:07,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-13 17:52:07,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436539729] [2021-08-13 17:52:07,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-08-13 17:52:07,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 17:52:07,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-13 17:52:07,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-13 17:52:07,396 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 20 [2021-08-13 17:52:07,396 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 29 transitions, 117 flow. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 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) [2021-08-13 17:52:07,396 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 17:52:07,396 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 20 [2021-08-13 17:52:07,396 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 17:52:07,480 INFO L129 PetriNetUnfolder]: 48/152 cut-off events. [2021-08-13 17:52:07,481 INFO L130 PetriNetUnfolder]: For 15/29 co-relation queries the response was YES. [2021-08-13 17:52:07,482 INFO L84 FinitePrefix]: Finished finitePrefix Result has 394 conditions, 152 events. 48/152 cut-off events. For 15/29 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 719 event pairs, 11 based on Foata normal form. 4/127 useless extension candidates. Maximal degree in co-relation 363. Up to 106 conditions per place. [2021-08-13 17:52:07,484 INFO L132 encePairwiseOnDemand]: 10/20 looper letters, 9 selfloop transitions, 13 changer transitions 0/32 dead transitions. [2021-08-13 17:52:07,484 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 32 transitions, 173 flow [2021-08-13 17:52:07,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-13 17:52:07,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-08-13 17:52:07,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 75 transitions. [2021-08-13 17:52:07,487 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.75 [2021-08-13 17:52:07,488 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 75 transitions. [2021-08-13 17:52:07,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 75 transitions. [2021-08-13 17:52:07,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 17:52:07,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 75 transitions. [2021-08-13 17:52:07,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 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) [2021-08-13 17:52:07,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 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) [2021-08-13 17:52:07,490 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 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) [2021-08-13 17:52:07,490 INFO L348 CegarLoopForPetriNet]: 27 programPoint places, 7 predicate places. [2021-08-13 17:52:07,490 INFO L482 AbstractCegarLoop]: Abstraction has has 34 places, 32 transitions, 173 flow [2021-08-13 17:52:07,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 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) [2021-08-13 17:52:07,491 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 17:52:07,491 INFO L266 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2021-08-13 17:52:07,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-08-13 17:52:07,705 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-08-13 17:52:07,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 17:52:07,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1006373414, now seen corresponding path program 1 times [2021-08-13 17:52:07,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 17:52:07,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948725590] [2021-08-13 17:52:07,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 17:52:07,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 17:52:07,712 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 17:52:07,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 17:52:07,717 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 17:52:07,718 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 17:52:07,718 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 17:52:07,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-13 17:52:07,719 WARN L235 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 17:52:07,719 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2021-08-13 17:52:07,726 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 17:52:07,727 INFO L255 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-08-13 17:52:07,728 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 17:52:07,728 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 17:52:07,728 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 17:52:07,728 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 17:52:07,728 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 17:52:07,728 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 17:52:07,728 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 17:52:07,728 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 17:52:07,729 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 34 places, 25 transitions, 82 flow [2021-08-13 17:52:07,732 INFO L129 PetriNetUnfolder]: 0/32 cut-off events. [2021-08-13 17:52:07,732 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2021-08-13 17:52:07,732 INFO L84 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 32 events. 0/32 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 60 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 0. Up to 5 conditions per place. [2021-08-13 17:52:07,732 INFO L82 GeneralOperation]: Start removeDead. Operand has 34 places, 25 transitions, 82 flow [2021-08-13 17:52:07,733 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 34 places, 25 transitions, 82 flow [2021-08-13 17:52:07,734 INFO L129 PetriNetUnfolder]: 0/8 cut-off events. [2021-08-13 17:52:07,734 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-08-13 17:52:07,734 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 17:52:07,734 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2021-08-13 17:52:07,734 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 17:52:07,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 17:52:07,734 INFO L82 PathProgramCache]: Analyzing trace with hash 99361376, now seen corresponding path program 1 times [2021-08-13 17:52:07,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 17:52:07,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559681057] [2021-08-13 17:52:07,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 17:52:07,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 17:52:07,742 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:07,742 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 17:52:07,757 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:07,759 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:52:07,762 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:07,762 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:52:07,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 17:52:07,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 17:52:07,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559681057] [2021-08-13 17:52:07,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559681057] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 17:52:07,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 17:52:07,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-13 17:52:07,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914107894] [2021-08-13 17:52:07,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-13 17:52:07,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 17:52:07,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-13 17:52:07,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-13 17:52:07,768 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 25 [2021-08-13 17:52:07,768 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 25 transitions, 82 flow. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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) [2021-08-13 17:52:07,768 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 17:52:07,768 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 25 [2021-08-13 17:52:07,768 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 17:52:07,916 INFO L129 PetriNetUnfolder]: 501/874 cut-off events. [2021-08-13 17:52:07,916 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2021-08-13 17:52:07,921 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1651 conditions, 874 events. 501/874 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 4496 event pairs, 282 based on Foata normal form. 0/606 useless extension candidates. Maximal degree in co-relation 1612. Up to 745 conditions per place. [2021-08-13 17:52:07,929 INFO L132 encePairwiseOnDemand]: 16/25 looper letters, 16 selfloop transitions, 9 changer transitions 0/37 dead transitions. [2021-08-13 17:52:07,930 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 37 transitions, 156 flow [2021-08-13 17:52:07,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-13 17:52:07,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-08-13 17:52:07,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 77 transitions. [2021-08-13 17:52:07,934 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.77 [2021-08-13 17:52:07,934 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 77 transitions. [2021-08-13 17:52:07,934 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 77 transitions. [2021-08-13 17:52:07,934 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 17:52:07,934 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 77 transitions. [2021-08-13 17:52:07,936 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 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) [2021-08-13 17:52:07,936 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 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) [2021-08-13 17:52:07,937 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 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) [2021-08-13 17:52:07,937 INFO L348 CegarLoopForPetriNet]: 34 programPoint places, 3 predicate places. [2021-08-13 17:52:07,937 INFO L482 AbstractCegarLoop]: Abstraction has has 37 places, 37 transitions, 156 flow [2021-08-13 17:52:07,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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) [2021-08-13 17:52:07,937 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 17:52:07,937 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 17:52:07,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-13 17:52:07,937 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 17:52:07,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 17:52:07,938 INFO L82 PathProgramCache]: Analyzing trace with hash 842086411, now seen corresponding path program 1 times [2021-08-13 17:52:07,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 17:52:07,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902265528] [2021-08-13 17:52:07,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 17:52:07,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 17:52:07,953 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:07,954 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 17:52:07,954 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:07,954 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:52:07,957 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:07,957 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:52:07,961 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:07,961 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:52:07,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 17:52:07,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 17:52:07,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902265528] [2021-08-13 17:52:07,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902265528] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-13 17:52:07,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697623791] [2021-08-13 17:52:07,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-13 17:52:07,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 17:52:07,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-13 17:52:07,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-13 17:52:07,994 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:07,994 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 17:52:07,994 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:07,995 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 17:52:07,995 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:07,995 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 17:52:07,996 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:07,996 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 17:52:07,997 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:07,997 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:52:07,997 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:07,998 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:52:07,998 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:07,998 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:52:07,998 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:07,999 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:52:07,999 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:07,999 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:52:08,000 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:08,000 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:52:08,001 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:08,001 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:52:08,001 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:08,002 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:52:08,003 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:08,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-08-13 17:52:08,004 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:08,005 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-08-13 17:52:08,005 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-08-13 17:52:08,006 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:08,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-08-13 17:52:08,008 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:08,008 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-08-13 17:52:08,009 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-08-13 17:52:08,010 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:08,011 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:52:08,011 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:08,012 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:52:08,012 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:08,012 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:52:08,013 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:08,013 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:52:08,013 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:08,014 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:52:08,014 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:08,014 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:52:08,015 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:08,015 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:52:08,015 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:08,016 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:52:08,016 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:08,016 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:52:08,017 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:08,017 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:52:08,018 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:08,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-08-13 17:52:08,020 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:08,020 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-08-13 17:52:08,021 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-08-13 17:52:08,021 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:08,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-08-13 17:52:08,023 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:08,023 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-08-13 17:52:08,024 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-08-13 17:52:08,024 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:08,026 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:52:08,026 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:08,026 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:52:08,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 17:52:08,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697623791] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-13 17:52:08,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-13 17:52:08,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-13 17:52:08,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079669208] [2021-08-13 17:52:08,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-08-13 17:52:08,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 17:52:08,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-13 17:52:08,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-13 17:52:08,028 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 25 [2021-08-13 17:52:08,028 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 37 transitions, 156 flow. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 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) [2021-08-13 17:52:08,028 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 17:52:08,029 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 25 [2021-08-13 17:52:08,029 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 17:52:08,182 INFO L129 PetriNetUnfolder]: 495/1025 cut-off events. [2021-08-13 17:52:08,182 INFO L130 PetriNetUnfolder]: For 33/119 co-relation queries the response was YES. [2021-08-13 17:52:08,186 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2756 conditions, 1025 events. 495/1025 cut-off events. For 33/119 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 6657 event pairs, 136 based on Foata normal form. 10/811 useless extension candidates. Maximal degree in co-relation 2715. Up to 845 conditions per place. [2021-08-13 17:52:08,214 INFO L132 encePairwiseOnDemand]: 12/25 looper letters, 16 selfloop transitions, 17 changer transitions 0/45 dead transitions. [2021-08-13 17:52:08,214 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 45 transitions, 254 flow [2021-08-13 17:52:08,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-13 17:52:08,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-08-13 17:52:08,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 97 transitions. [2021-08-13 17:52:08,218 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.776 [2021-08-13 17:52:08,218 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 97 transitions. [2021-08-13 17:52:08,219 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 97 transitions. [2021-08-13 17:52:08,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 17:52:08,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 97 transitions. [2021-08-13 17:52:08,219 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 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) [2021-08-13 17:52:08,221 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 25.0) internal successors, (150), 6 states have internal predecessors, (150), 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) [2021-08-13 17:52:08,222 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 25.0) internal successors, (150), 6 states have internal predecessors, (150), 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) [2021-08-13 17:52:08,222 INFO L348 CegarLoopForPetriNet]: 34 programPoint places, 7 predicate places. [2021-08-13 17:52:08,222 INFO L482 AbstractCegarLoop]: Abstraction has has 41 places, 45 transitions, 254 flow [2021-08-13 17:52:08,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 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) [2021-08-13 17:52:08,222 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 17:52:08,222 INFO L266 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 17:52:08,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-13 17:52:08,437 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 17:52:08,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 17:52:08,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1379665844, now seen corresponding path program 1 times [2021-08-13 17:52:08,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 17:52:08,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624839390] [2021-08-13 17:52:08,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 17:52:08,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 17:52:08,452 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 17:52:08,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 17:52:08,457 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 17:52:08,458 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 17:52:08,459 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 17:52:08,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-13 17:52:08,459 WARN L235 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 17:52:08,459 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2021-08-13 17:52:08,476 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 17:52:08,476 INFO L255 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-08-13 17:52:08,477 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 17:52:08,477 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 17:52:08,477 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 17:52:08,477 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 17:52:08,477 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 17:52:08,477 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 17:52:08,477 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 17:52:08,477 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 17:52:08,479 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 41 places, 30 transitions, 105 flow [2021-08-13 17:52:08,483 INFO L129 PetriNetUnfolder]: 0/39 cut-off events. [2021-08-13 17:52:08,484 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2021-08-13 17:52:08,484 INFO L84 FinitePrefix]: Finished finitePrefix Result has 70 conditions, 39 events. 0/39 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 73 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2021-08-13 17:52:08,484 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 30 transitions, 105 flow [2021-08-13 17:52:08,485 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 30 transitions, 105 flow [2021-08-13 17:52:08,486 INFO L129 PetriNetUnfolder]: 0/6 cut-off events. [2021-08-13 17:52:08,486 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-08-13 17:52:08,486 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 17:52:08,486 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2021-08-13 17:52:08,487 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, fooErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 17:52:08,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 17:52:08,487 INFO L82 PathProgramCache]: Analyzing trace with hash 127994498, now seen corresponding path program 1 times [2021-08-13 17:52:08,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 17:52:08,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167937293] [2021-08-13 17:52:08,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 17:52:08,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 17:52:08,512 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:08,513 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 17:52:08,514 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:08,514 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:52:08,518 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:08,518 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:52:08,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 17:52:08,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 17:52:08,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167937293] [2021-08-13 17:52:08,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167937293] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 17:52:08,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 17:52:08,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-13 17:52:08,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733351948] [2021-08-13 17:52:08,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-13 17:52:08,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 17:52:08,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-13 17:52:08,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-13 17:52:08,528 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 30 [2021-08-13 17:52:08,528 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 30 transitions, 105 flow. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 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) [2021-08-13 17:52:08,528 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 17:52:08,528 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 30 [2021-08-13 17:52:08,528 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 17:52:08,881 INFO L129 PetriNetUnfolder]: 2797/4229 cut-off events. [2021-08-13 17:52:08,881 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2021-08-13 17:52:08,897 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8077 conditions, 4229 events. 2797/4229 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 24280 event pairs, 1829 based on Foata normal form. 0/2902 useless extension candidates. Maximal degree in co-relation 8027. Up to 3806 conditions per place. [2021-08-13 17:52:09,010 INFO L132 encePairwiseOnDemand]: 19/30 looper letters, 20 selfloop transitions, 11 changer transitions 0/45 dead transitions. [2021-08-13 17:52:09,010 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 45 transitions, 197 flow [2021-08-13 17:52:09,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-13 17:52:09,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-08-13 17:52:09,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 92 transitions. [2021-08-13 17:52:09,011 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.7666666666666667 [2021-08-13 17:52:09,011 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 92 transitions. [2021-08-13 17:52:09,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 92 transitions. [2021-08-13 17:52:09,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 17:52:09,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 92 transitions. [2021-08-13 17:52:09,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 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) [2021-08-13 17:52:09,012 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 30.0) internal successors, (150), 5 states have internal predecessors, (150), 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) [2021-08-13 17:52:09,012 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 30.0) internal successors, (150), 5 states have internal predecessors, (150), 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) [2021-08-13 17:52:09,013 INFO L348 CegarLoopForPetriNet]: 41 programPoint places, 3 predicate places. [2021-08-13 17:52:09,013 INFO L482 AbstractCegarLoop]: Abstraction has has 44 places, 45 transitions, 197 flow [2021-08-13 17:52:09,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 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) [2021-08-13 17:52:09,013 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 17:52:09,013 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 17:52:09,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-13 17:52:09,013 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, fooErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 17:52:09,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 17:52:09,014 INFO L82 PathProgramCache]: Analyzing trace with hash -858253191, now seen corresponding path program 1 times [2021-08-13 17:52:09,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 17:52:09,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422522902] [2021-08-13 17:52:09,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 17:52:09,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 17:52:09,042 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:09,043 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 17:52:09,044 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:09,044 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:52:09,047 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:09,050 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:52:09,054 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 17:52:09,054 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 17:52:09,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-13 17:52:09,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 17:52:09,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422522902] [2021-08-13 17:52:09,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422522902] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 17:52:09,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 17:52:09,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-13 17:52:09,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842378524] [2021-08-13 17:52:09,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-08-13 17:52:09,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 17:52:09,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-13 17:52:09,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-13 17:52:09,063 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 30 [2021-08-13 17:52:09,063 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 45 transitions, 197 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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) [2021-08-13 17:52:09,063 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 17:52:09,063 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 30 [2021-08-13 17:52:09,063 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 17:52:09,720 INFO L129 PetriNetUnfolder]: 3442/5890 cut-off events. [2021-08-13 17:52:09,720 INFO L130 PetriNetUnfolder]: For 81/1087 co-relation queries the response was YES. [2021-08-13 17:52:09,737 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16165 conditions, 5890 events. 3442/5890 cut-off events. For 81/1087 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 43224 event pairs, 1051 based on Foata normal form. 22/4660 useless extension candidates. Maximal degree in co-relation 16113. Up to 5111 conditions per place. [2021-08-13 17:52:09,788 INFO L132 encePairwiseOnDemand]: 14/30 looper letters, 20 selfloop transitions, 21 changer transitions 0/55 dead transitions. [2021-08-13 17:52:09,788 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 55 transitions, 319 flow [2021-08-13 17:52:09,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-13 17:52:09,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-08-13 17:52:09,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 116 transitions. [2021-08-13 17:52:09,789 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.7733333333333333 [2021-08-13 17:52:09,789 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 116 transitions. [2021-08-13 17:52:09,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 116 transitions. [2021-08-13 17:52:09,790 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 17:52:09,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 116 transitions. [2021-08-13 17:52:09,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 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) [2021-08-13 17:52:09,791 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 30.0) internal successors, (180), 6 states have internal predecessors, (180), 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) [2021-08-13 17:52:09,791 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 30.0) internal successors, (180), 6 states have internal predecessors, (180), 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) [2021-08-13 17:52:09,791 INFO L348 CegarLoopForPetriNet]: 41 programPoint places, 7 predicate places. [2021-08-13 17:52:09,791 INFO L482 AbstractCegarLoop]: Abstraction has has 48 places, 55 transitions, 319 flow [2021-08-13 17:52:09,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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) [2021-08-13 17:52:09,791 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 17:52:09,791 INFO L266 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 17:52:09,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-08-13 17:52:09,792 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, fooErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 17:52:09,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 17:52:09,792 INFO L82 PathProgramCache]: Analyzing trace with hash -326571233, now seen corresponding path program 1 times [2021-08-13 17:52:09,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 17:52:09,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623378145] [2021-08-13 17:52:09,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 17:52:09,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 17:52:09,797 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 17:52:09,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 17:52:09,800 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 17:52:09,802 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 17:52:09,802 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 17:52:09,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-08-13 17:52:09,805 INFO L239 ceAbstractionStarter]: Analysis of concurrent program completed with 5 thread instances [2021-08-13 17:52:09,816 INFO L202 PluginConnector]: Adding new model ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.08 05:52:09 BasicIcfg [2021-08-13 17:52:09,816 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-13 17:52:09,817 INFO L168 Benchmark]: Toolchain (without parser) took 3676.77 ms. Allocated memory was 182.5 MB in the beginning and 226.5 MB in the end (delta: 44.0 MB). Free memory was 163.9 MB in the beginning and 129.3 MB in the end (delta: 34.6 MB). Peak memory consumption was 79.0 MB. Max. memory is 8.0 GB. [2021-08-13 17:52:09,817 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 182.5 MB. Free memory is still 164.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-13 17:52:09,818 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.95 ms. Allocated memory is still 182.5 MB. Free memory was 163.7 MB in the beginning and 162.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-13 17:52:09,818 INFO L168 Benchmark]: Boogie Preprocessor took 16.51 ms. Allocated memory is still 182.5 MB. Free memory was 162.2 MB in the beginning and 161.3 MB in the end (delta: 908.1 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-13 17:52:09,818 INFO L168 Benchmark]: RCFGBuilder took 219.91 ms. Allocated memory is still 182.5 MB. Free memory was 161.3 MB in the beginning and 152.9 MB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2021-08-13 17:52:09,819 INFO L168 Benchmark]: TraceAbstraction took 3406.59 ms. Allocated memory was 182.5 MB in the beginning and 226.5 MB in the end (delta: 44.0 MB). Free memory was 152.3 MB in the beginning and 129.3 MB in the end (delta: 23.0 MB). Peak memory consumption was 67.5 MB. Max. memory is 8.0 GB. [2021-08-13 17:52:09,820 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 0.14 ms. Allocated memory is still 182.5 MB. Free memory is still 164.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 27.95 ms. Allocated memory is still 182.5 MB. Free memory was 163.7 MB in the beginning and 162.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 16.51 ms. Allocated memory is still 182.5 MB. Free memory was 162.2 MB in the beginning and 161.3 MB in the end (delta: 908.1 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 219.91 ms. Allocated memory is still 182.5 MB. Free memory was 161.3 MB in the beginning and 152.9 MB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3406.59 ms. Allocated memory was 182.5 MB in the beginning and 226.5 MB in the end (delta: 44.0 MB). Free memory was 152.3 MB in the beginning and 129.3 MB in the end (delta: 23.0 MB). Peak memory consumption was 67.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 31]: assertion can be violated assertion can be violated We found a FailurePath: [L17] 0 newid := 0; VAL [newid=0] [L18] 0 n := 0; VAL [n=0, newid=0] [L21] FORK 0 fork newid foo(); VAL [n=0, newid=0] [L30] 1 n := n + 1; VAL [n=1, newid=0] [L22] 0 newid := newid + 1; VAL [n=1, newid=1] [L21] FORK 0 fork newid foo(); VAL [n=1, newid=1] [L30] 2 n := n + 1; VAL [n=2, newid=1] [L22] 0 newid := newid + 1; VAL [n=2, newid=2] [L21] FORK 0 fork newid foo(); VAL [n=2, newid=2] [L30] 3 n := n + 1; VAL [n=3, newid=2] [L31] 3 assert n <= 2; VAL [n=3, newid=2] - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 16 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 3.7ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: UNSAFE, OverallTime: 255.5ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 45.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 29.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1 SDtfs, 1 SDslu, 0 SDs, 0 SdLazy, 4 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=1, InterpolantAutomatonStates: 4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 3.7ms SsaConstructionTime, 18.6ms SatisfiabilityAnalysisTime, 47.7ms InterpolantComputationTime, 10 NumberOfCodeBlocks, 10 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 4 ConstructedInterpolants, 0 QuantifiedInterpolants, 10 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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 - StatisticsResult: Ultimate Automizer benchmark data with 2 thread instances CFG has 4 procedures, 21 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 9.0ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: UNSAFE, OverallTime: 185.2ms, OverallIterations: 2, TraceHistogramMax: 2, EmptinessCheckTime: 0.0ms, AutomataDifference: 62.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 3 SDtfs, 2 SDslu, 0 SDs, 0 SdLazy, 16 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 22.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=72occurred in iteration=1, InterpolantAutomatonStates: 4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.2ms SsaConstructionTime, 10.0ms SatisfiabilityAnalysisTime, 52.5ms InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 4 ConstructedInterpolants, 0 QuantifiedInterpolants, 10 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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 - StatisticsResult: Ultimate Automizer benchmark data with 3 thread instances CFG has 5 procedures, 26 locations, 5 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 7.4ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: UNSAFE, OverallTime: 768.4ms, OverallIterations: 3, TraceHistogramMax: 3, EmptinessCheckTime: 0.0ms, AutomataDifference: 230.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 17.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 8 SDtfs, 9 SDslu, 0 SDs, 0 SdLazy, 54 SolverSat, 16 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 66.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=173occurred in iteration=2, InterpolantAutomatonStates: 9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 9.1ms SsaConstructionTime, 32.0ms SatisfiabilityAnalysisTime, 200.2ms InterpolantComputationTime, 30 NumberOfCodeBlocks, 30 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 18 ConstructedInterpolants, 0 QuantifiedInterpolants, 48 SizeOfPredicates, 0 NumberOfNonLiveVariables, 17 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 0/2 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 - StatisticsResult: Ultimate Automizer benchmark data with 4 thread instances CFG has 6 procedures, 31 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.8ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: UNSAFE, OverallTime: 731.5ms, OverallIterations: 3, TraceHistogramMax: 4, EmptinessCheckTime: 0.0ms, AutomataDifference: 363.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 4.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 12 SDtfs, 12 SDslu, 0 SDs, 0 SdLazy, 79 SolverSat, 22 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 65.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=254occurred in iteration=2, InterpolantAutomatonStates: 9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2.9ms SsaConstructionTime, 21.6ms SatisfiabilityAnalysisTime, 81.5ms InterpolantComputationTime, 32 NumberOfCodeBlocks, 32 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 18 ConstructedInterpolants, 0 QuantifiedInterpolants, 48 SizeOfPredicates, 0 NumberOfNonLiveVariables, 17 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 0/2 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 - StatisticsResult: Ultimate Automizer benchmark data with 5 thread instances CFG has 7 procedures, 36 locations, 7 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 1.4ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: UNSAFE, OverallTime: 1325.9ms, OverallIterations: 3, TraceHistogramMax: 2, EmptinessCheckTime: 0.0ms, AutomataDifference: 1214.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 13 SDtfs, 15 SDslu, 0 SDs, 0 SdLazy, 101 SolverSat, 28 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 65.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=319occurred in iteration=2, InterpolantAutomatonStates: 9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.7ms SsaConstructionTime, 13.1ms SatisfiabilityAnalysisTime, 66.0ms InterpolantComputationTime, 24 NumberOfCodeBlocks, 24 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 11 ConstructedInterpolants, 0 QuantifiedInterpolants, 29 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 1/1 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 incorrect! Received shutdown request...