/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.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 02:37:15,731 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-13 02:37:15,732 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-13 02:37:15,757 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-13 02:37:15,789 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.epf [2021-08-13 02:37:15,809 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-13 02:37:15,809 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-13 02:37:15,810 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-13 02:37:15,810 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-13 02:37:15,811 INFO L138 SettingsManager]: * Use SBE=true [2021-08-13 02:37:15,811 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-13 02:37:15,811 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-13 02:37:15,811 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-13 02:37:15,811 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-13 02:37:15,811 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-13 02:37:15,811 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-13 02:37:15,811 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-13 02:37:15,811 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-13 02:37:15,811 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-13 02:37:15,811 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-13 02:37:15,812 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-13 02:37:15,812 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-13 02:37:15,812 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-13 02:37:15,812 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-13 02:37:15,812 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-13 02:37:15,812 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-13 02:37:15,812 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-13 02:37:15,812 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-13 02:37:15,812 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-13 02:37:15,813 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-13 02:37:15,813 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-13 02:37:15,813 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-13 02:37:15,813 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-13 02:37:15,813 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-08-13 02:37:15,813 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-13 02:37:15,813 INFO L138 SettingsManager]: * Compute cosets for OwickiGries annotation iteratively=true [2021-08-13 02:37:15,813 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-13 02:37:16,056 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-13 02:37:16,069 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-13 02:37:16,071 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-13 02:37:16,072 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-13 02:37:16,072 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-13 02:37:16,073 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/ForkInLoop02-Incrementer.bpl [2021-08-13 02:37:16,073 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/ForkInLoop02-Incrementer.bpl' [2021-08-13 02:37:16,107 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-13 02:37:16,108 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-13 02:37:16,109 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-13 02:37:16,109 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-13 02:37:16,109 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-13 02:37:16,117 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 02:37:16" (1/1) ... [2021-08-13 02:37:16,123 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 02:37:16" (1/1) ... [2021-08-13 02:37:16,129 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-13 02:37:16,130 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-13 02:37:16,130 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-13 02:37:16,131 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-13 02:37:16,136 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 02:37:16" (1/1) ... [2021-08-13 02:37:16,136 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 02:37:16" (1/1) ... [2021-08-13 02:37:16,137 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 02:37:16" (1/1) ... [2021-08-13 02:37:16,137 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 02:37:16" (1/1) ... [2021-08-13 02:37:16,139 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 02:37:16" (1/1) ... [2021-08-13 02:37:16,141 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 02:37:16" (1/1) ... [2021-08-13 02:37:16,141 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 02:37:16" (1/1) ... [2021-08-13 02:37:16,142 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-13 02:37:16,144 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-13 02:37:16,144 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-13 02:37:16,144 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-13 02:37:16,146 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 02:37:16" (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 02:37:16,212 INFO L124 BoogieDeclarations]: Specification and implementation of procedure foo given in one single declaration [2021-08-13 02:37:16,212 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2021-08-13 02:37:16,212 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2021-08-13 02:37:16,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-13 02:37:16,213 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-13 02:37:16,214 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 02:37:16,315 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-13 02:37:16,316 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-08-13 02:37:16,317 INFO L202 PluginConnector]: Adding new model ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.08 02:37:16 BoogieIcfgContainer [2021-08-13 02:37:16,317 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-13 02:37:16,319 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-13 02:37:16,319 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-13 02:37:16,321 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-13 02:37:16,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 02:37:16" (1/2) ... [2021-08-13 02:37:16,322 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70be3162 and model type ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.08 02:37:16, skipping insertion in model container [2021-08-13 02:37:16,322 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 02:37:16" (2/2) ... [2021-08-13 02:37:16,325 INFO L111 eAbstractionObserver]: Analyzing ICFG ForkInLoop02-Incrementer.bpl [2021-08-13 02:37:16,331 INFO L206 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-13 02:37:16,332 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-13 02:37:16,333 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-13 02:37:16,354 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:37:16,369 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-13 02:37:16,383 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:37:16,383 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:37:16,384 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:37:16,384 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:37:16,384 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:37:16,384 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:37:16,384 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:37:16,384 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:37:16,390 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 13 places, 10 transitions, 25 flow [2021-08-13 02:37:16,401 INFO L129 PetriNetUnfolder]: 0/11 cut-off events. [2021-08-13 02:37:16,401 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:16,402 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 02:37:16,402 INFO L82 GeneralOperation]: Start removeDead. Operand has 13 places, 10 transitions, 25 flow [2021-08-13 02:37:16,405 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 13 places, 10 transitions, 25 flow [2021-08-13 02:37:16,407 INFO L129 PetriNetUnfolder]: 0/7 cut-off events. [2021-08-13 02:37:16,407 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:16,407 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:16,408 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2021-08-13 02:37:16,408 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-08-13 02:37:16,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:16,412 INFO L82 PathProgramCache]: Analyzing trace with hash 42091544, now seen corresponding path program 1 times [2021-08-13 02:37:16,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:16,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004845496] [2021-08-13 02:37:16,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:16,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:37:16,499 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:16,502 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 02:37:16,504 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:16,504 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:16,514 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:16,514 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:16,531 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 02:37:16,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:37:16,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004845496] [2021-08-13 02:37:16,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004845496] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:37:16,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:37:16,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-13 02:37:16,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350500117] [2021-08-13 02:37:16,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-13 02:37:16,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:37:16,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-13 02:37:16,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-13 02:37:16,548 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 10 [2021-08-13 02:37:16,550 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 02:37:16,550 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:37:16,550 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 10 [2021-08-13 02:37:16,551 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:37:16,575 INFO L129 PetriNetUnfolder]: 0/10 cut-off events. [2021-08-13 02:37:16,576 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:37:16,576 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 02:37:16,576 INFO L132 encePairwiseOnDemand]: 7/10 looper letters, 1 selfloop transitions, 2 changer transitions 1/9 dead transitions. [2021-08-13 02:37:16,577 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 15 places, 9 transitions, 29 flow [2021-08-13 02:37:16,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-13 02:37:16,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-08-13 02:37:16,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 28 transitions. [2021-08-13 02:37:16,583 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.7 [2021-08-13 02:37:16,584 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 28 transitions. [2021-08-13 02:37:16,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 28 transitions. [2021-08-13 02:37:16,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:37:16,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 28 transitions. [2021-08-13 02:37:16,586 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 02:37:16,588 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 02:37:16,589 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 02:37:16,589 INFO L348 CegarLoopForPetriNet]: 13 programPoint places, 2 predicate places. [2021-08-13 02:37:16,589 INFO L482 AbstractCegarLoop]: Abstraction has has 15 places, 9 transitions, 29 flow [2021-08-13 02:37:16,589 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 02:37:16,589 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:16,589 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2021-08-13 02:37:16,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-13 02:37:16,590 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-08-13 02:37:16,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:16,590 INFO L82 PathProgramCache]: Analyzing trace with hash 42091268, now seen corresponding path program 1 times [2021-08-13 02:37:16,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:16,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517381885] [2021-08-13 02:37:16,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:16,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:16,595 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:16,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:16,598 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:16,606 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:37:16,606 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:37:16,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-13 02:37:16,607 WARN L235 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:37:16,607 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2021-08-13 02:37:16,612 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:37:16,612 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-13 02:37:16,613 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:37:16,613 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:37:16,613 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:37:16,614 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:37:16,614 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:37:16,614 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:37:16,614 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:37:16,614 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:37:16,614 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 20 places, 15 transitions, 42 flow [2021-08-13 02:37:16,618 INFO L129 PetriNetUnfolder]: 0/18 cut-off events. [2021-08-13 02:37:16,618 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-08-13 02:37:16,618 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 02:37:16,618 INFO L82 GeneralOperation]: Start removeDead. Operand has 20 places, 15 transitions, 42 flow [2021-08-13 02:37:16,618 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 20 places, 15 transitions, 42 flow [2021-08-13 02:37:16,620 INFO L129 PetriNetUnfolder]: 0/9 cut-off events. [2021-08-13 02:37:16,620 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-08-13 02:37:16,620 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:16,621 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2021-08-13 02:37:16,621 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:37:16,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:16,621 INFO L82 PathProgramCache]: Analyzing trace with hash 56409963, now seen corresponding path program 1 times [2021-08-13 02:37:16,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:16,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133503828] [2021-08-13 02:37:16,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:16,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:37:16,629 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:16,629 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 02:37:16,629 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:16,630 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:16,633 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:16,633 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:16,637 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 02:37:16,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:37:16,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133503828] [2021-08-13 02:37:16,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133503828] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:37:16,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:37:16,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-13 02:37:16,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146334242] [2021-08-13 02:37:16,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-13 02:37:16,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:37:16,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-13 02:37:16,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-13 02:37:16,639 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 15 [2021-08-13 02:37:16,639 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 02:37:16,639 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:37:16,639 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 15 [2021-08-13 02:37:16,639 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:37:16,663 INFO L129 PetriNetUnfolder]: 7/34 cut-off events. [2021-08-13 02:37:16,664 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-08-13 02:37:16,665 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 02:37:16,665 INFO L132 encePairwiseOnDemand]: 10/15 looper letters, 6 selfloop transitions, 5 changer transitions 0/19 dead transitions. [2021-08-13 02:37:16,665 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 19 transitions, 72 flow [2021-08-13 02:37:16,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-13 02:37:16,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-08-13 02:37:16,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 45 transitions. [2021-08-13 02:37:16,666 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.75 [2021-08-13 02:37:16,666 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 45 transitions. [2021-08-13 02:37:16,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 45 transitions. [2021-08-13 02:37:16,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:37:16,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 45 transitions. [2021-08-13 02:37:16,667 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 02:37:16,668 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 02:37:16,668 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 02:37:16,668 INFO L348 CegarLoopForPetriNet]: 20 programPoint places, 3 predicate places. [2021-08-13 02:37:16,668 INFO L482 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 72 flow [2021-08-13 02:37:16,668 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 02:37:16,668 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:16,668 INFO L266 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2021-08-13 02:37:16,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-13 02:37:16,668 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:37:16,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:16,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1624858962, now seen corresponding path program 1 times [2021-08-13 02:37:16,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:16,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198952383] [2021-08-13 02:37:16,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:16,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:16,673 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:16,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:16,676 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:16,677 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:37:16,677 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:37:16,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-13 02:37:16,678 WARN L235 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:37:16,678 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2021-08-13 02:37:16,706 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:37:16,706 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-08-13 02:37:16,708 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:37:16,708 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:37:16,708 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:37:16,708 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:37:16,708 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:37:16,708 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:37:16,708 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:37:16,708 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:37:16,709 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 27 places, 20 transitions, 61 flow [2021-08-13 02:37:16,713 INFO L129 PetriNetUnfolder]: 0/25 cut-off events. [2021-08-13 02:37:16,713 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2021-08-13 02:37:16,714 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 02:37:16,714 INFO L82 GeneralOperation]: Start removeDead. Operand has 27 places, 20 transitions, 61 flow [2021-08-13 02:37:16,714 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 27 places, 20 transitions, 61 flow [2021-08-13 02:37:16,716 INFO L129 PetriNetUnfolder]: 0/9 cut-off events. [2021-08-13 02:37:16,716 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-08-13 02:37:16,716 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:16,716 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2021-08-13 02:37:16,717 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-08-13 02:37:16,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:16,717 INFO L82 PathProgramCache]: Analyzing trace with hash 75500163, now seen corresponding path program 1 times [2021-08-13 02:37:16,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:16,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105009125] [2021-08-13 02:37:16,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:16,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:37:16,724 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:16,725 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 02:37:16,725 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:16,726 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:16,728 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:16,729 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:16,732 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 02:37:16,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:37:16,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105009125] [2021-08-13 02:37:16,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105009125] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:37:16,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:37:16,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-13 02:37:16,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440019776] [2021-08-13 02:37:16,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-13 02:37:16,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:37:16,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-13 02:37:16,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-13 02:37:16,734 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 20 [2021-08-13 02:37:16,735 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 02:37:16,735 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:37:16,735 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 20 [2021-08-13 02:37:16,735 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:37:16,799 INFO L129 PetriNetUnfolder]: 75/170 cut-off events. [2021-08-13 02:37:16,799 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2021-08-13 02:37:16,810 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 02:37:16,816 INFO L132 encePairwiseOnDemand]: 13/20 looper letters, 12 selfloop transitions, 7 changer transitions 0/29 dead transitions. [2021-08-13 02:37:16,817 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 29 transitions, 117 flow [2021-08-13 02:37:16,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-13 02:37:16,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-08-13 02:37:16,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 62 transitions. [2021-08-13 02:37:16,818 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.775 [2021-08-13 02:37:16,818 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 62 transitions. [2021-08-13 02:37:16,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 62 transitions. [2021-08-13 02:37:16,819 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:37:16,819 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 62 transitions. [2021-08-13 02:37:16,819 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 02:37:16,820 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 02:37:16,820 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 02:37:16,820 INFO L348 CegarLoopForPetriNet]: 27 programPoint places, 3 predicate places. [2021-08-13 02:37:16,820 INFO L482 AbstractCegarLoop]: Abstraction has has 30 places, 29 transitions, 117 flow [2021-08-13 02:37:16,820 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 02:37:16,820 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:16,820 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:37:16,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-13 02:37:16,821 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-08-13 02:37:16,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:16,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1337973353, now seen corresponding path program 1 times [2021-08-13 02:37:16,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:16,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942942986] [2021-08-13 02:37:16,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:16,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:37:16,833 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:16,833 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 02:37:16,834 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:16,834 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:16,837 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:16,837 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:16,841 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:16,842 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:16,846 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 02:37:16,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:37:16,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942942986] [2021-08-13 02:37:16,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942942986] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-13 02:37:16,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910617645] [2021-08-13 02:37:16,847 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 02:37:16,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:37:16,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-13 02:37:16,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-13 02:37:16,894 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:16,894 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 02:37:16,895 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:16,895 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 02:37:16,896 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:16,896 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 02:37:16,896 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:16,897 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 02:37:16,898 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:16,898 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:16,898 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:16,899 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:16,900 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:16,900 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:16,901 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:16,901 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:16,902 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:16,902 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:16,903 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:16,903 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:16,904 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:16,904 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:16,905 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:16,905 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:16,911 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:16,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-08-13 02:37:16,924 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:16,925 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-08-13 02:37:16,925 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-08-13 02:37:16,927 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:16,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-08-13 02:37:16,928 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:16,929 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-08-13 02:37:16,929 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-08-13 02:37:16,930 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:16,936 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:16,936 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:16,938 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:16,938 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:16,939 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:16,939 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:16,939 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:16,940 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:16,941 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:16,941 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:16,942 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:16,942 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:16,942 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:16,943 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:16,943 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:16,943 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:16,944 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:16,944 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:16,945 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:16,947 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:16,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-08-13 02:37:16,953 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:16,969 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-08-13 02:37:16,970 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-08-13 02:37:16,970 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:16,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-08-13 02:37:16,972 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:16,972 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-08-13 02:37:16,973 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-08-13 02:37:16,977 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:16,978 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:16,978 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:16,979 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:16,979 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 02:37:16,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910617645] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-13 02:37:16,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-13 02:37:16,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-13 02:37:16,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257951013] [2021-08-13 02:37:16,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-08-13 02:37:16,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:37:16,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-13 02:37:16,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-13 02:37:16,981 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 20 [2021-08-13 02:37:16,981 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 02:37:16,981 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:37:16,981 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 20 [2021-08-13 02:37:16,982 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:37:17,050 INFO L129 PetriNetUnfolder]: 48/152 cut-off events. [2021-08-13 02:37:17,051 INFO L130 PetriNetUnfolder]: For 15/29 co-relation queries the response was YES. [2021-08-13 02:37:17,051 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 02:37:17,053 INFO L132 encePairwiseOnDemand]: 10/20 looper letters, 9 selfloop transitions, 13 changer transitions 0/32 dead transitions. [2021-08-13 02:37:17,053 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 32 transitions, 173 flow [2021-08-13 02:37:17,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-13 02:37:17,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-08-13 02:37:17,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 75 transitions. [2021-08-13 02:37:17,054 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.75 [2021-08-13 02:37:17,054 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 75 transitions. [2021-08-13 02:37:17,054 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 75 transitions. [2021-08-13 02:37:17,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:37:17,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 75 transitions. [2021-08-13 02:37:17,055 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 02:37:17,056 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 02:37:17,056 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 02:37:17,056 INFO L348 CegarLoopForPetriNet]: 27 programPoint places, 7 predicate places. [2021-08-13 02:37:17,056 INFO L482 AbstractCegarLoop]: Abstraction has has 34 places, 32 transitions, 173 flow [2021-08-13 02:37:17,056 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 02:37:17,057 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:17,057 INFO L266 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2021-08-13 02:37:17,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-08-13 02:37:17,274 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-08-13 02:37:17,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:17,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1006373414, now seen corresponding path program 1 times [2021-08-13 02:37:17,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:17,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182231304] [2021-08-13 02:37:17,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:17,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:17,279 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:17,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:17,284 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:17,286 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:37:17,286 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:37:17,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-13 02:37:17,286 WARN L235 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:37:17,286 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2021-08-13 02:37:17,299 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:37:17,299 INFO L255 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-08-13 02:37:17,300 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:37:17,301 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:37:17,301 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:37:17,301 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:37:17,302 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:37:17,302 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:37:17,302 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:37:17,302 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:37:17,305 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 34 places, 25 transitions, 82 flow [2021-08-13 02:37:17,308 INFO L129 PetriNetUnfolder]: 0/32 cut-off events. [2021-08-13 02:37:17,308 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2021-08-13 02:37:17,308 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 02:37:17,308 INFO L82 GeneralOperation]: Start removeDead. Operand has 34 places, 25 transitions, 82 flow [2021-08-13 02:37:17,308 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 34 places, 25 transitions, 82 flow [2021-08-13 02:37:17,309 INFO L129 PetriNetUnfolder]: 0/8 cut-off events. [2021-08-13 02:37:17,309 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-08-13 02:37:17,309 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:17,309 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2021-08-13 02:37:17,310 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:37:17,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:17,310 INFO L82 PathProgramCache]: Analyzing trace with hash 99361376, now seen corresponding path program 1 times [2021-08-13 02:37:17,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:17,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997069648] [2021-08-13 02:37:17,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:17,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:37:17,333 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:17,334 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 02:37:17,335 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:17,335 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:17,339 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:17,340 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:17,343 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 02:37:17,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:37:17,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997069648] [2021-08-13 02:37:17,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997069648] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:37:17,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:37:17,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-13 02:37:17,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787068980] [2021-08-13 02:37:17,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-13 02:37:17,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:37:17,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-13 02:37:17,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-13 02:37:17,347 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 25 [2021-08-13 02:37:17,347 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 02:37:17,347 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:37:17,347 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 25 [2021-08-13 02:37:17,347 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:37:17,478 INFO L129 PetriNetUnfolder]: 501/874 cut-off events. [2021-08-13 02:37:17,479 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2021-08-13 02:37:17,486 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 02:37:17,493 INFO L132 encePairwiseOnDemand]: 16/25 looper letters, 16 selfloop transitions, 9 changer transitions 0/37 dead transitions. [2021-08-13 02:37:17,493 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 37 transitions, 156 flow [2021-08-13 02:37:17,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-13 02:37:17,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-08-13 02:37:17,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 77 transitions. [2021-08-13 02:37:17,497 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.77 [2021-08-13 02:37:17,497 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 77 transitions. [2021-08-13 02:37:17,497 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 77 transitions. [2021-08-13 02:37:17,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:37:17,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 77 transitions. [2021-08-13 02:37:17,500 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 02:37:17,501 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 02:37:17,501 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 02:37:17,501 INFO L348 CegarLoopForPetriNet]: 34 programPoint places, 3 predicate places. [2021-08-13 02:37:17,501 INFO L482 AbstractCegarLoop]: Abstraction has has 37 places, 37 transitions, 156 flow [2021-08-13 02:37:17,501 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 02:37:17,501 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:17,501 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:37:17,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-13 02:37:17,501 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:37:17,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:17,502 INFO L82 PathProgramCache]: Analyzing trace with hash 842086411, now seen corresponding path program 1 times [2021-08-13 02:37:17,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:17,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820898949] [2021-08-13 02:37:17,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:17,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:37:17,528 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:17,528 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 02:37:17,532 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:17,533 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:17,537 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:17,537 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:17,540 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:17,542 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:17,546 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 02:37:17,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:37:17,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820898949] [2021-08-13 02:37:17,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820898949] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-13 02:37:17,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894919136] [2021-08-13 02:37:17,547 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 02:37:17,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:37:17,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-13 02:37:17,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-13 02:37:17,587 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:17,587 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 02:37:17,588 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:17,588 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 02:37:17,588 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:17,588 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 02:37:17,589 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:17,589 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 02:37:17,589 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:17,590 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:17,590 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:17,590 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:17,591 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:17,591 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:17,591 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:17,591 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:17,592 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:17,592 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:17,592 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:17,593 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:17,593 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:17,593 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:17,593 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:17,594 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:17,594 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:17,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-08-13 02:37:17,596 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:17,596 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-08-13 02:37:17,597 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-08-13 02:37:17,597 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:17,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-08-13 02:37:17,598 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:17,599 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-08-13 02:37:17,599 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-08-13 02:37:17,600 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:17,601 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:17,603 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:17,603 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:17,604 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:17,605 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:17,605 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:17,605 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:17,606 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:17,607 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:17,608 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:17,608 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:17,608 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:17,609 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:17,609 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:17,610 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:17,610 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:17,611 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:17,611 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:17,612 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:17,614 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:17,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-08-13 02:37:17,615 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:17,617 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-08-13 02:37:17,617 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-08-13 02:37:17,620 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:17,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-08-13 02:37:17,622 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:17,622 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-08-13 02:37:17,623 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-08-13 02:37:17,624 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:17,626 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:17,626 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:17,626 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:17,627 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 02:37:17,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894919136] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-13 02:37:17,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-13 02:37:17,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-13 02:37:17,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62183965] [2021-08-13 02:37:17,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-08-13 02:37:17,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:37:17,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-13 02:37:17,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-13 02:37:17,628 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 25 [2021-08-13 02:37:17,628 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 02:37:17,628 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:37:17,628 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 25 [2021-08-13 02:37:17,628 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:37:17,741 INFO L129 PetriNetUnfolder]: 495/1025 cut-off events. [2021-08-13 02:37:17,741 INFO L130 PetriNetUnfolder]: For 33/119 co-relation queries the response was YES. [2021-08-13 02:37:17,769 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 02:37:17,775 INFO L132 encePairwiseOnDemand]: 12/25 looper letters, 16 selfloop transitions, 17 changer transitions 0/45 dead transitions. [2021-08-13 02:37:17,775 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 45 transitions, 254 flow [2021-08-13 02:37:17,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-13 02:37:17,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-08-13 02:37:17,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 97 transitions. [2021-08-13 02:37:17,777 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.776 [2021-08-13 02:37:17,777 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 97 transitions. [2021-08-13 02:37:17,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 97 transitions. [2021-08-13 02:37:17,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:37:17,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 97 transitions. [2021-08-13 02:37:17,778 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 02:37:17,780 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 02:37:17,780 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 02:37:17,780 INFO L348 CegarLoopForPetriNet]: 34 programPoint places, 7 predicate places. [2021-08-13 02:37:17,780 INFO L482 AbstractCegarLoop]: Abstraction has has 41 places, 45 transitions, 254 flow [2021-08-13 02:37:17,780 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 02:37:17,781 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:17,781 INFO L266 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:37:17,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-13 02:37:17,997 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:37:17,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:17,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1379665844, now seen corresponding path program 1 times [2021-08-13 02:37:17,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:17,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27377307] [2021-08-13 02:37:17,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:18,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:18,002 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:18,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:18,005 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:18,006 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:37:18,006 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:37:18,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-13 02:37:18,007 WARN L235 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:37:18,007 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2021-08-13 02:37:18,020 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:37:18,020 INFO L255 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-08-13 02:37:18,021 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:37:18,021 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:37:18,021 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:37:18,021 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:37:18,021 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:37:18,021 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:37:18,021 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:37:18,021 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:37:18,025 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 41 places, 30 transitions, 105 flow [2021-08-13 02:37:18,031 INFO L129 PetriNetUnfolder]: 0/39 cut-off events. [2021-08-13 02:37:18,031 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2021-08-13 02:37:18,031 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 02:37:18,031 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 30 transitions, 105 flow [2021-08-13 02:37:18,032 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 30 transitions, 105 flow [2021-08-13 02:37:18,033 INFO L129 PetriNetUnfolder]: 0/6 cut-off events. [2021-08-13 02:37:18,033 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-08-13 02:37:18,033 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:18,033 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2021-08-13 02:37:18,033 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, fooErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:37:18,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:18,033 INFO L82 PathProgramCache]: Analyzing trace with hash 127994498, now seen corresponding path program 1 times [2021-08-13 02:37:18,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:18,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129414582] [2021-08-13 02:37:18,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:18,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:37:18,051 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:18,051 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 02:37:18,052 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:18,052 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:18,054 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:18,055 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:18,058 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 02:37:18,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:37:18,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129414582] [2021-08-13 02:37:18,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129414582] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:37:18,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:37:18,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-13 02:37:18,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762918145] [2021-08-13 02:37:18,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-13 02:37:18,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:37:18,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-13 02:37:18,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-13 02:37:18,061 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 30 [2021-08-13 02:37:18,061 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 02:37:18,061 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:37:18,061 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 30 [2021-08-13 02:37:18,061 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:37:18,337 INFO L129 PetriNetUnfolder]: 2797/4229 cut-off events. [2021-08-13 02:37:18,337 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2021-08-13 02:37:18,347 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 02:37:18,374 INFO L132 encePairwiseOnDemand]: 19/30 looper letters, 20 selfloop transitions, 11 changer transitions 0/45 dead transitions. [2021-08-13 02:37:18,375 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 45 transitions, 197 flow [2021-08-13 02:37:18,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-13 02:37:18,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-08-13 02:37:18,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 92 transitions. [2021-08-13 02:37:18,376 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.7666666666666667 [2021-08-13 02:37:18,376 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 92 transitions. [2021-08-13 02:37:18,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 92 transitions. [2021-08-13 02:37:18,376 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:37:18,376 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 92 transitions. [2021-08-13 02:37:18,376 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 02:37:18,377 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 02:37:18,377 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 02:37:18,377 INFO L348 CegarLoopForPetriNet]: 41 programPoint places, 3 predicate places. [2021-08-13 02:37:18,377 INFO L482 AbstractCegarLoop]: Abstraction has has 44 places, 45 transitions, 197 flow [2021-08-13 02:37:18,377 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 02:37:18,377 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:18,377 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:37:18,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-13 02:37:18,377 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, fooErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:37:18,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:18,377 INFO L82 PathProgramCache]: Analyzing trace with hash -858253191, now seen corresponding path program 1 times [2021-08-13 02:37:18,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:18,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651860356] [2021-08-13 02:37:18,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:18,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:37:18,403 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:18,404 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 02:37:18,404 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:18,404 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:18,407 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:18,409 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:18,415 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:37:18,416 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:37:18,422 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 02:37:18,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:37:18,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651860356] [2021-08-13 02:37:18,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651860356] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:37:18,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:37:18,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-13 02:37:18,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673236375] [2021-08-13 02:37:18,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-08-13 02:37:18,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:37:18,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-13 02:37:18,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-13 02:37:18,424 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 30 [2021-08-13 02:37:18,424 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 02:37:18,424 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:37:18,424 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 30 [2021-08-13 02:37:18,424 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:37:18,850 INFO L129 PetriNetUnfolder]: 3442/5890 cut-off events. [2021-08-13 02:37:18,850 INFO L130 PetriNetUnfolder]: For 81/1087 co-relation queries the response was YES. [2021-08-13 02:37:18,865 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 02:37:18,972 INFO L132 encePairwiseOnDemand]: 14/30 looper letters, 20 selfloop transitions, 21 changer transitions 0/55 dead transitions. [2021-08-13 02:37:18,972 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 55 transitions, 319 flow [2021-08-13 02:37:18,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-13 02:37:18,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-08-13 02:37:18,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 116 transitions. [2021-08-13 02:37:18,980 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.7733333333333333 [2021-08-13 02:37:18,980 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 116 transitions. [2021-08-13 02:37:18,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 116 transitions. [2021-08-13 02:37:18,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:37:18,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 116 transitions. [2021-08-13 02:37:18,980 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 02:37:18,981 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 02:37:18,981 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 02:37:18,981 INFO L348 CegarLoopForPetriNet]: 41 programPoint places, 7 predicate places. [2021-08-13 02:37:18,981 INFO L482 AbstractCegarLoop]: Abstraction has has 48 places, 55 transitions, 319 flow [2021-08-13 02:37:18,981 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 02:37:18,981 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:37:18,981 INFO L266 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:37:18,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-08-13 02:37:18,981 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, fooErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, fooErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:37:18,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:37:18,982 INFO L82 PathProgramCache]: Analyzing trace with hash -326571233, now seen corresponding path program 1 times [2021-08-13 02:37:18,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:37:18,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722954357] [2021-08-13 02:37:18,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:37:18,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:18,999 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:19,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:37:19,008 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:37:19,011 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:37:19,011 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:37:19,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-08-13 02:37:19,014 INFO L239 ceAbstractionStarter]: Analysis of concurrent program completed with 5 thread instances [2021-08-13 02:37:19,025 INFO L202 PluginConnector]: Adding new model ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.08 02:37:19 BasicIcfg [2021-08-13 02:37:19,025 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-13 02:37:19,049 INFO L168 Benchmark]: Toolchain (without parser) took 2917.70 ms. Allocated memory was 255.9 MB in the beginning and 354.4 MB in the end (delta: 98.6 MB). Free memory was 237.0 MB in the beginning and 278.3 MB in the end (delta: -41.3 MB). Peak memory consumption was 58.2 MB. Max. memory is 8.0 GB. [2021-08-13 02:37:19,049 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 255.9 MB. Free memory is still 238.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-13 02:37:19,049 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.46 ms. Allocated memory is still 255.9 MB. Free memory was 236.9 MB in the beginning and 235.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-13 02:37:19,050 INFO L168 Benchmark]: Boogie Preprocessor took 11.61 ms. Allocated memory is still 255.9 MB. Free memory was 235.5 MB in the beginning and 234.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-13 02:37:19,050 INFO L168 Benchmark]: RCFGBuilder took 173.26 ms. Allocated memory is still 255.9 MB. Free memory was 234.5 MB in the beginning and 225.9 MB in the end (delta: 8.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2021-08-13 02:37:19,050 INFO L168 Benchmark]: TraceAbstraction took 2706.33 ms. Allocated memory was 255.9 MB in the beginning and 354.4 MB in the end (delta: 98.6 MB). Free memory was 225.6 MB in the beginning and 278.3 MB in the end (delta: -52.7 MB). Peak memory consumption was 46.7 MB. Max. memory is 8.0 GB. [2021-08-13 02:37:19,051 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 255.9 MB. Free memory is still 238.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 20.46 ms. Allocated memory is still 255.9 MB. Free memory was 236.9 MB in the beginning and 235.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 11.61 ms. Allocated memory is still 255.9 MB. Free memory was 235.5 MB in the beginning and 234.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 173.26 ms. Allocated memory is still 255.9 MB. Free memory was 234.5 MB in the beginning and 225.9 MB in the end (delta: 8.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2706.33 ms. Allocated memory was 255.9 MB in the beginning and 354.4 MB in the end (delta: 98.6 MB). Free memory was 225.6 MB in the beginning and 278.3 MB in the end (delta: -52.7 MB). Peak memory consumption was 46.7 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: 2.5ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: UNSAFE, OverallTime: 226.4ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 44.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 20.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1 SDtfs, 1 SDslu, 0 SDs, 0 SdLazy, 4 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.5ms 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: 2.7ms SsaConstructionTime, 14.8ms SatisfiabilityAnalysisTime, 62.7ms 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: 2.0ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: UNSAFE, OverallTime: 64.7ms, OverallIterations: 2, TraceHistogramMax: 2, EmptinessCheckTime: 0.0ms, AutomataDifference: 29.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 4.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 3 SDtfs, 2 SDslu, 0 SDs, 0 SdLazy, 16 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 11.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.7ms 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: 0.9ms SsaConstructionTime, 3.9ms SatisfiabilityAnalysisTime, 11.6ms 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: 1.9ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: UNSAFE, OverallTime: 578.7ms, OverallIterations: 3, TraceHistogramMax: 3, EmptinessCheckTime: 0.0ms, AutomataDifference: 162.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 6.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 8 SDtfs, 9 SDslu, 0 SDs, 0 SdLazy, 54 SolverSat, 16 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 47.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.5ms 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: 3.1ms SsaConstructionTime, 10.3ms SatisfiabilityAnalysisTime, 125.3ms 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: 0.9ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: UNSAFE, OverallTime: 707.2ms, OverallIterations: 3, TraceHistogramMax: 4, EmptinessCheckTime: 0.0ms, AutomataDifference: 308.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 6.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 12 SDtfs, 12 SDslu, 0 SDs, 0 SdLazy, 79 SolverSat, 22 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 56.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.4ms 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: 2.8ms SsaConstructionTime, 23.1ms SatisfiabilityAnalysisTime, 95.5ms 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: 0.5ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: UNSAFE, OverallTime: 991.1ms, OverallIterations: 3, TraceHistogramMax: 2, EmptinessCheckTime: 0.0ms, AutomataDifference: 873.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 13 SDtfs, 15 SDslu, 0 SDs, 0 SdLazy, 101 SolverSat, 28 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 86.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.3ms 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: 1.2ms SsaConstructionTime, 25.2ms SatisfiabilityAnalysisTime, 55.2ms 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...