/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-1-dsl.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-770125f [2021-05-21 20:51:55,718 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-21 20:51:55,719 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-21 20:51:55,744 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-21 20:51:55,744 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-21 20:51:55,745 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-21 20:51:55,746 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-21 20:51:55,748 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-21 20:51:55,749 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-21 20:51:55,750 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-21 20:51:55,751 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-21 20:51:55,752 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-21 20:51:55,752 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-21 20:51:55,753 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-21 20:51:55,754 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-21 20:51:55,755 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-21 20:51:55,756 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-21 20:51:55,756 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-21 20:51:55,758 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-21 20:51:55,759 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-21 20:51:55,760 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-21 20:51:55,761 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-21 20:51:55,762 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-21 20:51:55,763 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-21 20:51:55,765 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-21 20:51:55,772 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-21 20:51:55,773 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-21 20:51:55,773 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-21 20:51:55,774 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-05-21 20:51:55,793 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-21 20:51:55,793 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-21 20:51:55,794 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-21 20:51:55,794 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-21 20:51:55,795 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-21 20:51:55,795 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-21 20:51:55,795 INFO L138 SettingsManager]: * Use SBE=true [2021-05-21 20:51:55,795 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-21 20:51:55,795 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-21 20:51:55,796 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-21 20:51:55,796 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-21 20:51:55,796 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-21 20:51:55,796 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-21 20:51:55,796 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-21 20:51:55,796 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-21 20:51:55,797 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-21 20:51:55,797 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-21 20:51:55,797 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-21 20:51:55,797 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-21 20:51:55,797 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-21 20:51:55,797 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-21 20:51:55,798 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-21 20:51:55,798 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-21 20:51:55,798 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-21 20:51:55,798 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-21 20:51:55,798 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-21 20:51:55,799 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-21 20:51:55,799 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-21 20:51:55,799 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-21 20:51:55,799 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-21 20:51:55,799 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-21 20:51:55,799 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-21 20:51:56,096 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-21 20:51:56,118 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-21 20:51:56,121 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-21 20:51:56,122 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-21 20:51:56,124 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-21 20:51:56,125 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-1-dsl.wvr.bpl [2021-05-21 20:51:56,125 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-1-dsl.wvr.bpl' [2021-05-21 20:51:56,177 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-21 20:51:56,178 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-21 20:51:56,180 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-21 20:51:56,180 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-21 20:51:56,180 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-21 20:51:56,191 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:51:56" (1/1) ... [2021-05-21 20:51:56,198 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:51:56" (1/1) ... [2021-05-21 20:51:56,205 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-21 20:51:56,206 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-21 20:51:56,207 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-21 20:51:56,207 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-21 20:51:56,214 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:51:56" (1/1) ... [2021-05-21 20:51:56,214 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:51:56" (1/1) ... [2021-05-21 20:51:56,215 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:51:56" (1/1) ... [2021-05-21 20:51:56,215 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:51:56" (1/1) ... [2021-05-21 20:51:56,222 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:51:56" (1/1) ... [2021-05-21 20:51:56,225 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:51:56" (1/1) ... [2021-05-21 20:51:56,226 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:51:56" (1/1) ... [2021-05-21 20:51:56,227 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-21 20:51:56,228 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-21 20:51:56,228 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-21 20:51:56,228 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-21 20:51:56,233 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:51:56" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-21 20:51:56,314 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-21 20:51:56,315 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-21 20:51:56,315 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-21 20:51:56,316 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-21 20:51:56,316 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-21 20:51:56,316 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-21 20:51:56,316 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-21 20:51:56,316 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-21 20:51:56,316 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-21 20:51:56,316 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-05-21 20:51:56,317 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-05-21 20:51:56,317 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-05-21 20:51:56,317 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-05-21 20:51:56,317 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-05-21 20:51:56,317 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-05-21 20:51:56,317 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread5 given in one single declaration [2021-05-21 20:51:56,317 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2021-05-21 20:51:56,318 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2021-05-21 20:51:56,318 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread6 given in one single declaration [2021-05-21 20:51:56,318 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2021-05-21 20:51:56,319 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2021-05-21 20:51:56,320 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-21 20:51:56,533 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-21 20:51:56,534 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-05-21 20:51:56,534 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-05-21 20:51:56,535 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2021-05-21 20:51:56,535 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread5EXIT is neither atomic block end nor error location. [2021-05-21 20:51:56,535 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread6EXIT is neither atomic block end nor error location. [2021-05-21 20:51:56,536 INFO L202 PluginConnector]: Adding new model parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 08:51:56 BoogieIcfgContainer [2021-05-21 20:51:56,536 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-21 20:51:56,549 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-21 20:51:56,549 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-21 20:51:56,552 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-21 20:51:56,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 08:51:56" (1/2) ... [2021-05-21 20:51:56,553 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70e0e9c5 and model type parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.05 08:51:56, skipping insertion in model container [2021-05-21 20:51:56,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parallel-sum-1-dsl.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 08:51:56" (2/2) ... [2021-05-21 20:51:56,554 INFO L111 eAbstractionObserver]: Analyzing ICFG parallel-sum-1-dsl.wvr.bpl [2021-05-21 20:51:56,559 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-21 20:51:56,559 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-21 20:51:56,559 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-05-21 20:51:56,560 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-21 20:51:56,678 INFO L149 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2021-05-21 20:51:56,704 INFO L255 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2021-05-21 20:51:56,720 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-21 20:51:56,720 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-21 20:51:56,720 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-21 20:51:56,720 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-21 20:51:56,720 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-21 20:51:56,720 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-21 20:51:56,720 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-21 20:51:56,721 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-21 20:51:56,729 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 59 places, 48 transitions, 168 flow [2021-05-21 20:51:56,786 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 405 states, 403 states have (on average 3.880893300248139) internal successors, (1564), 404 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:56,789 INFO L276 IsEmpty]: Start isEmpty. Operand has 405 states, 403 states have (on average 3.880893300248139) internal successors, (1564), 404 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:56,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-21 20:51:56,813 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:56,814 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:56,815 INFO L430 AbstractCegarLoop]: === Iteration 1 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:56,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:56,827 INFO L82 PathProgramCache]: Analyzing trace with hash -2039335680, now seen corresponding path program 1 times [2021-05-21 20:51:56,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:56,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561415461] [2021-05-21 20:51:56,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:56,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:57,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:57,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:57,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561415461] [2021-05-21 20:51:57,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561415461] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:51:57,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:51:57,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-21 20:51:57,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203475373] [2021-05-21 20:51:57,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-21 20:51:57,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:57,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-21 20:51:57,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-21 20:51:57,067 INFO L87 Difference]: Start difference. First operand has 405 states, 403 states have (on average 3.880893300248139) internal successors, (1564), 404 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:57,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:57,140 INFO L93 Difference]: Finished difference Result 1089 states and 4336 transitions. [2021-05-21 20:51:57,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-21 20:51:57,142 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-21 20:51:57,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:57,173 INFO L225 Difference]: With dead ends: 1089 [2021-05-21 20:51:57,173 INFO L226 Difference]: Without dead ends: 1068 [2021-05-21 20:51:57,175 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 51.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-21 20:51:57,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2021-05-21 20:51:57,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 525. [2021-05-21 20:51:57,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 524 states have (on average 3.881679389312977) internal successors, (2034), 524 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:57,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 2034 transitions. [2021-05-21 20:51:57,280 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 2034 transitions. Word has length 22 [2021-05-21 20:51:57,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:57,282 INFO L482 AbstractCegarLoop]: Abstraction has 525 states and 2034 transitions. [2021-05-21 20:51:57,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:57,282 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 2034 transitions. [2021-05-21 20:51:57,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-21 20:51:57,285 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:57,285 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:57,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-21 20:51:57,286 INFO L430 AbstractCegarLoop]: === Iteration 2 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:57,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:57,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1643355036, now seen corresponding path program 2 times [2021-05-21 20:51:57,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:57,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350490265] [2021-05-21 20:51:57,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:57,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:57,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:57,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:57,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350490265] [2021-05-21 20:51:57,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350490265] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:51:57,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:51:57,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-21 20:51:57,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791786091] [2021-05-21 20:51:57,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-21 20:51:57,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:57,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-21 20:51:57,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-21 20:51:57,366 INFO L87 Difference]: Start difference. First operand 525 states and 2034 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:57,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:57,427 INFO L93 Difference]: Finished difference Result 1218 states and 4830 transitions. [2021-05-21 20:51:57,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-21 20:51:57,428 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-21 20:51:57,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:57,438 INFO L225 Difference]: With dead ends: 1218 [2021-05-21 20:51:57,439 INFO L226 Difference]: Without dead ends: 1197 [2021-05-21 20:51:57,439 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-21 20:51:57,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1197 states. [2021-05-21 20:51:57,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1197 to 545. [2021-05-21 20:51:57,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 544 states have (on average 3.8529411764705883) internal successors, (2096), 544 states have internal predecessors, (2096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:57,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 2096 transitions. [2021-05-21 20:51:57,470 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 2096 transitions. Word has length 22 [2021-05-21 20:51:57,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:57,470 INFO L482 AbstractCegarLoop]: Abstraction has 545 states and 2096 transitions. [2021-05-21 20:51:57,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:57,472 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 2096 transitions. [2021-05-21 20:51:57,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-21 20:51:57,475 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:57,475 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:57,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-21 20:51:57,475 INFO L430 AbstractCegarLoop]: === Iteration 3 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:57,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:57,476 INFO L82 PathProgramCache]: Analyzing trace with hash -661584511, now seen corresponding path program 1 times [2021-05-21 20:51:57,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:57,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117966225] [2021-05-21 20:51:57,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:57,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:57,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:57,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:57,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117966225] [2021-05-21 20:51:57,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117966225] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:51:57,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:51:57,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-21 20:51:57,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783382487] [2021-05-21 20:51:57,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-21 20:51:57,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:57,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-21 20:51:57,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-21 20:51:57,521 INFO L87 Difference]: Start difference. First operand 545 states and 2096 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:57,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:57,545 INFO L93 Difference]: Finished difference Result 545 states and 1997 transitions. [2021-05-21 20:51:57,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-21 20:51:57,545 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-21 20:51:57,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:57,549 INFO L225 Difference]: With dead ends: 545 [2021-05-21 20:51:57,550 INFO L226 Difference]: Without dead ends: 529 [2021-05-21 20:51:57,550 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-21 20:51:57,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-05-21 20:51:57,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 529. [2021-05-21 20:51:57,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 528 states have (on average 3.6761363636363638) internal successors, (1941), 528 states have internal predecessors, (1941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:57,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 1941 transitions. [2021-05-21 20:51:57,568 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 1941 transitions. Word has length 24 [2021-05-21 20:51:57,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:57,568 INFO L482 AbstractCegarLoop]: Abstraction has 529 states and 1941 transitions. [2021-05-21 20:51:57,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:57,569 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 1941 transitions. [2021-05-21 20:51:57,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-21 20:51:57,571 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:57,571 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:57,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-21 20:51:57,571 INFO L430 AbstractCegarLoop]: === Iteration 4 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:57,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:57,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1934875805, now seen corresponding path program 2 times [2021-05-21 20:51:57,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:57,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781458210] [2021-05-21 20:51:57,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:57,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:57,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:57,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:57,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781458210] [2021-05-21 20:51:57,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781458210] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:51:57,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:51:57,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-21 20:51:57,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718694797] [2021-05-21 20:51:57,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-21 20:51:57,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:57,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-21 20:51:57,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-21 20:51:57,637 INFO L87 Difference]: Start difference. First operand 529 states and 1941 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:57,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:57,785 INFO L93 Difference]: Finished difference Result 1358 states and 5017 transitions. [2021-05-21 20:51:57,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:51:57,786 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-21 20:51:57,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:57,797 INFO L225 Difference]: With dead ends: 1358 [2021-05-21 20:51:57,797 INFO L226 Difference]: Without dead ends: 1346 [2021-05-21 20:51:57,798 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 45.9ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:51:57,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1346 states. [2021-05-21 20:51:57,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1346 to 680. [2021-05-21 20:51:57,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 680 states, 679 states have (on average 3.787923416789396) internal successors, (2572), 679 states have internal predecessors, (2572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:57,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 2572 transitions. [2021-05-21 20:51:57,834 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 2572 transitions. Word has length 24 [2021-05-21 20:51:57,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:57,834 INFO L482 AbstractCegarLoop]: Abstraction has 680 states and 2572 transitions. [2021-05-21 20:51:57,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:57,835 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 2572 transitions. [2021-05-21 20:51:57,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-21 20:51:57,838 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:57,838 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:57,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-21 20:51:57,840 INFO L430 AbstractCegarLoop]: === Iteration 5 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:57,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:57,841 INFO L82 PathProgramCache]: Analyzing trace with hash 2074450649, now seen corresponding path program 1 times [2021-05-21 20:51:57,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:57,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574337699] [2021-05-21 20:51:57,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:57,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:57,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:57,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:57,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574337699] [2021-05-21 20:51:57,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574337699] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:51:57,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:51:57,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-21 20:51:57,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508497122] [2021-05-21 20:51:57,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-21 20:51:57,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:57,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-21 20:51:57,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-21 20:51:57,887 INFO L87 Difference]: Start difference. First operand 680 states and 2572 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:57,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:57,917 INFO L93 Difference]: Finished difference Result 652 states and 2325 transitions. [2021-05-21 20:51:57,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-21 20:51:57,917 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-21 20:51:57,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:57,923 INFO L225 Difference]: With dead ends: 652 [2021-05-21 20:51:57,924 INFO L226 Difference]: Without dead ends: 604 [2021-05-21 20:51:57,924 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-21 20:51:57,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-05-21 20:51:57,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 604. [2021-05-21 20:51:57,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 603 states have (on average 3.583747927031509) internal successors, (2161), 603 states have internal predecessors, (2161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:57,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 2161 transitions. [2021-05-21 20:51:57,945 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 2161 transitions. Word has length 24 [2021-05-21 20:51:57,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:57,946 INFO L482 AbstractCegarLoop]: Abstraction has 604 states and 2161 transitions. [2021-05-21 20:51:57,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:57,946 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 2161 transitions. [2021-05-21 20:51:57,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-21 20:51:57,948 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:57,948 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:57,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-21 20:51:57,949 INFO L430 AbstractCegarLoop]: === Iteration 6 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:57,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:57,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1944733407, now seen corresponding path program 1 times [2021-05-21 20:51:57,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:57,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348714247] [2021-05-21 20:51:57,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:57,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:58,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:58,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:58,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348714247] [2021-05-21 20:51:58,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348714247] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:58,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981075207] [2021-05-21 20:51:58,007 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 [2021-05-21 20:51:58,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:58,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-21 20:51:58,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:58,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:58,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981075207] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:58,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:58,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-05-21 20:51:58,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642716201] [2021-05-21 20:51:58,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:51:58,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:58,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:51:58,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:51:58,278 INFO L87 Difference]: Start difference. First operand 604 states and 2161 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:58,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:58,343 INFO L93 Difference]: Finished difference Result 1057 states and 3653 transitions. [2021-05-21 20:51:58,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 20:51:58,344 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-21 20:51:58,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:58,349 INFO L225 Difference]: With dead ends: 1057 [2021-05-21 20:51:58,350 INFO L226 Difference]: Without dead ends: 989 [2021-05-21 20:51:58,351 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 32.6ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:51:58,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2021-05-21 20:51:58,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 685. [2021-05-21 20:51:58,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685 states, 684 states have (on average 3.6271929824561404) internal successors, (2481), 684 states have internal predecessors, (2481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:58,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 2481 transitions. [2021-05-21 20:51:58,376 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 2481 transitions. Word has length 24 [2021-05-21 20:51:58,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:58,376 INFO L482 AbstractCegarLoop]: Abstraction has 685 states and 2481 transitions. [2021-05-21 20:51:58,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:58,376 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 2481 transitions. [2021-05-21 20:51:58,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-21 20:51:58,379 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:58,379 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:58,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-21 20:51:58,602 INFO L430 AbstractCegarLoop]: === Iteration 7 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:58,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:58,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1051081059, now seen corresponding path program 2 times [2021-05-21 20:51:58,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:58,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050881765] [2021-05-21 20:51:58,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:58,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:58,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:58,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:58,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050881765] [2021-05-21 20:51:58,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050881765] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:51:58,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:51:58,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-21 20:51:58,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559047398] [2021-05-21 20:51:58,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-21 20:51:58,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:58,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-21 20:51:58,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-21 20:51:58,634 INFO L87 Difference]: Start difference. First operand 685 states and 2481 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:58,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:58,706 INFO L93 Difference]: Finished difference Result 990 states and 3448 transitions. [2021-05-21 20:51:58,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-21 20:51:58,707 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-21 20:51:58,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:58,713 INFO L225 Difference]: With dead ends: 990 [2021-05-21 20:51:58,713 INFO L226 Difference]: Without dead ends: 963 [2021-05-21 20:51:58,713 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 25.0ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:51:58,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2021-05-21 20:51:58,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 703. [2021-05-21 20:51:58,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 702 states have (on average 3.6210826210826212) internal successors, (2542), 702 states have internal predecessors, (2542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:58,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 2542 transitions. [2021-05-21 20:51:58,738 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 2542 transitions. Word has length 24 [2021-05-21 20:51:58,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:58,739 INFO L482 AbstractCegarLoop]: Abstraction has 703 states and 2542 transitions. [2021-05-21 20:51:58,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:58,740 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 2542 transitions. [2021-05-21 20:51:58,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-21 20:51:58,743 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:58,743 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:58,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-21 20:51:58,743 INFO L430 AbstractCegarLoop]: === Iteration 8 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:58,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:58,744 INFO L82 PathProgramCache]: Analyzing trace with hash 628675505, now seen corresponding path program 3 times [2021-05-21 20:51:58,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:58,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355565402] [2021-05-21 20:51:58,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:58,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:58,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:58,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:58,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355565402] [2021-05-21 20:51:58,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355565402] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:58,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810120505] [2021-05-21 20:51:58,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-05-21 20:51:58,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 20:51:58,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:51:58,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-21 20:51:58,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:58,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:58,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810120505] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:58,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:58,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-05-21 20:51:58,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714327548] [2021-05-21 20:51:58,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:51:58,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:58,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:51:58,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:51:58,913 INFO L87 Difference]: Start difference. First operand 703 states and 2542 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:58,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:58,985 INFO L93 Difference]: Finished difference Result 1033 states and 3563 transitions. [2021-05-21 20:51:58,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 20:51:58,986 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-21 20:51:58,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:58,992 INFO L225 Difference]: With dead ends: 1033 [2021-05-21 20:51:58,992 INFO L226 Difference]: Without dead ends: 949 [2021-05-21 20:51:58,993 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 30.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:51:58,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2021-05-21 20:51:59,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 628. [2021-05-21 20:51:59,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 627 states have (on average 3.5964912280701755) internal successors, (2255), 627 states have internal predecessors, (2255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:59,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 2255 transitions. [2021-05-21 20:51:59,020 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 2255 transitions. Word has length 24 [2021-05-21 20:51:59,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:59,020 INFO L482 AbstractCegarLoop]: Abstraction has 628 states and 2255 transitions. [2021-05-21 20:51:59,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:59,021 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 2255 transitions. [2021-05-21 20:51:59,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-21 20:51:59,022 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:59,023 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:59,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:51:59,246 INFO L430 AbstractCegarLoop]: === Iteration 9 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:59,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:59,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1476649541, now seen corresponding path program 4 times [2021-05-21 20:51:59,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:59,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751107892] [2021-05-21 20:51:59,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:59,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:59,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:59,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:59,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751107892] [2021-05-21 20:51:59,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751107892] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:51:59,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:51:59,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-21 20:51:59,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985946379] [2021-05-21 20:51:59,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-21 20:51:59,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:59,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-21 20:51:59,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-21 20:51:59,277 INFO L87 Difference]: Start difference. First operand 628 states and 2255 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:59,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:59,352 INFO L93 Difference]: Finished difference Result 847 states and 3018 transitions. [2021-05-21 20:51:59,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:51:59,352 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-21 20:51:59,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:59,357 INFO L225 Difference]: With dead ends: 847 [2021-05-21 20:51:59,357 INFO L226 Difference]: Without dead ends: 827 [2021-05-21 20:51:59,358 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 24.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:51:59,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2021-05-21 20:51:59,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 620. [2021-05-21 20:51:59,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 619 states have (on average 3.61389337641357) internal successors, (2237), 619 states have internal predecessors, (2237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:59,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 2237 transitions. [2021-05-21 20:51:59,378 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 2237 transitions. Word has length 24 [2021-05-21 20:51:59,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:59,378 INFO L482 AbstractCegarLoop]: Abstraction has 620 states and 2237 transitions. [2021-05-21 20:51:59,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:59,378 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 2237 transitions. [2021-05-21 20:51:59,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-21 20:51:59,380 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:59,380 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:59,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-21 20:51:59,380 INFO L430 AbstractCegarLoop]: === Iteration 10 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:59,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:59,381 INFO L82 PathProgramCache]: Analyzing trace with hash 954675751, now seen corresponding path program 3 times [2021-05-21 20:51:59,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:59,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331819341] [2021-05-21 20:51:59,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:59,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:59,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:59,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:59,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331819341] [2021-05-21 20:51:59,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331819341] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:59,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843797179] [2021-05-21 20:51:59,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:51:59,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 20:51:59,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:51:59,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-21 20:51:59,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:51:59,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:59,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843797179] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:51:59,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:51:59,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-05-21 20:51:59,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634622278] [2021-05-21 20:51:59,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 20:51:59,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:59,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 20:51:59,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-21 20:51:59,513 INFO L87 Difference]: Start difference. First operand 620 states and 2237 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:59,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:59,573 INFO L93 Difference]: Finished difference Result 857 states and 3066 transitions. [2021-05-21 20:51:59,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 20:51:59,574 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-21 20:51:59,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:59,579 INFO L225 Difference]: With dead ends: 857 [2021-05-21 20:51:59,579 INFO L226 Difference]: Without dead ends: 857 [2021-05-21 20:51:59,580 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 31.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:51:59,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2021-05-21 20:51:59,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 548. [2021-05-21 20:51:59,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 3.579524680073126) internal successors, (1958), 547 states have internal predecessors, (1958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:59,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 1958 transitions. [2021-05-21 20:51:59,600 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 1958 transitions. Word has length 24 [2021-05-21 20:51:59,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:59,600 INFO L482 AbstractCegarLoop]: Abstraction has 548 states and 1958 transitions. [2021-05-21 20:51:59,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:59,601 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 1958 transitions. [2021-05-21 20:51:59,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-21 20:51:59,602 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:59,603 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:59,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-21 20:51:59,827 INFO L430 AbstractCegarLoop]: === Iteration 11 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:59,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:59,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1922149633, now seen corresponding path program 5 times [2021-05-21 20:51:59,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:59,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988051883] [2021-05-21 20:51:59,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:59,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:51:59,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:51:59,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:51:59,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988051883] [2021-05-21 20:51:59,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988051883] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:51:59,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:51:59,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-21 20:51:59,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491011486] [2021-05-21 20:51:59,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-21 20:51:59,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:51:59,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-21 20:51:59,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-21 20:51:59,869 INFO L87 Difference]: Start difference. First operand 548 states and 1958 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:59,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:51:59,962 INFO L93 Difference]: Finished difference Result 866 states and 3014 transitions. [2021-05-21 20:51:59,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-21 20:51:59,963 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-21 20:51:59,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:51:59,968 INFO L225 Difference]: With dead ends: 866 [2021-05-21 20:51:59,968 INFO L226 Difference]: Without dead ends: 842 [2021-05-21 20:51:59,968 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 34.7ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:51:59,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2021-05-21 20:51:59,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 608. [2021-05-21 20:51:59,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 607 states have (on average 3.602965403624382) internal successors, (2187), 607 states have internal predecessors, (2187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:59,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 2187 transitions. [2021-05-21 20:51:59,988 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 2187 transitions. Word has length 24 [2021-05-21 20:51:59,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:51:59,988 INFO L482 AbstractCegarLoop]: Abstraction has 608 states and 2187 transitions. [2021-05-21 20:51:59,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:51:59,988 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 2187 transitions. [2021-05-21 20:51:59,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-21 20:51:59,990 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:51:59,990 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:51:59,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-05-21 20:51:59,990 INFO L430 AbstractCegarLoop]: === Iteration 12 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:51:59,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:51:59,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1932007235, now seen corresponding path program 4 times [2021-05-21 20:51:59,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:51:59,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167632439] [2021-05-21 20:51:59,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:51:59,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:00,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:00,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:52:00,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167632439] [2021-05-21 20:52:00,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167632439] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:00,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177236554] [2021-05-21 20:52:00,022 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:00,071 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 20:52:00,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:52:00,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-21 20:52:00,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:52:00,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:00,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177236554] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:00,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:52:00,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-05-21 20:52:00,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559582944] [2021-05-21 20:52:00,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:52:00,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:52:00,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:52:00,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:52:00,136 INFO L87 Difference]: Start difference. First operand 608 states and 2187 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:00,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:52:00,209 INFO L93 Difference]: Finished difference Result 825 states and 2855 transitions. [2021-05-21 20:52:00,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 20:52:00,209 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-21 20:52:00,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:52:00,213 INFO L225 Difference]: With dead ends: 825 [2021-05-21 20:52:00,213 INFO L226 Difference]: Without dead ends: 757 [2021-05-21 20:52:00,214 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 26.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:52:00,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2021-05-21 20:52:00,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 603. [2021-05-21 20:52:00,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 602 states have (on average 3.5930232558139537) internal successors, (2163), 602 states have internal predecessors, (2163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:00,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 2163 transitions. [2021-05-21 20:52:00,232 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 2163 transitions. Word has length 24 [2021-05-21 20:52:00,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:52:00,232 INFO L482 AbstractCegarLoop]: Abstraction has 603 states and 2163 transitions. [2021-05-21 20:52:00,232 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:00,232 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 2163 transitions. [2021-05-21 20:52:00,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-21 20:52:00,234 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:52:00,234 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:52:00,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:00,456 INFO L430 AbstractCegarLoop]: === Iteration 13 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:52:00,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:52:00,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1038354887, now seen corresponding path program 5 times [2021-05-21 20:52:00,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:52:00,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183874665] [2021-05-21 20:52:00,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:52:00,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:00,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:00,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:52:00,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183874665] [2021-05-21 20:52:00,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183874665] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:52:00,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:52:00,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-21 20:52:00,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026911021] [2021-05-21 20:52:00,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-21 20:52:00,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:52:00,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-21 20:52:00,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-21 20:52:00,495 INFO L87 Difference]: Start difference. First operand 603 states and 2163 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:00,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:52:00,582 INFO L93 Difference]: Finished difference Result 985 states and 3379 transitions. [2021-05-21 20:52:00,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 20:52:00,583 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-21 20:52:00,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:52:00,589 INFO L225 Difference]: With dead ends: 985 [2021-05-21 20:52:00,589 INFO L226 Difference]: Without dead ends: 946 [2021-05-21 20:52:00,589 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 32.7ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-21 20:52:00,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2021-05-21 20:52:00,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 591. [2021-05-21 20:52:00,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 3.6) internal successors, (2124), 590 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:00,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 2124 transitions. [2021-05-21 20:52:00,608 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 2124 transitions. Word has length 24 [2021-05-21 20:52:00,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:52:00,608 INFO L482 AbstractCegarLoop]: Abstraction has 591 states and 2124 transitions. [2021-05-21 20:52:00,608 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:00,608 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 2124 transitions. [2021-05-21 20:52:00,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-21 20:52:00,610 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:52:00,610 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:52:00,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-05-21 20:52:00,610 INFO L430 AbstractCegarLoop]: === Iteration 14 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:52:00,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:52:00,611 INFO L82 PathProgramCache]: Analyzing trace with hash 641401677, now seen corresponding path program 6 times [2021-05-21 20:52:00,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:52:00,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157476586] [2021-05-21 20:52:00,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:52:00,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:00,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:00,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:52:00,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157476586] [2021-05-21 20:52:00,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157476586] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:00,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016271880] [2021-05-21 20:52:00,635 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:00,677 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 20:52:00,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 20:52:00,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-21 20:52:00,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:52:00,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:00,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016271880] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:00,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:52:00,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-05-21 20:52:00,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654194201] [2021-05-21 20:52:00,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 20:52:00,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:52:00,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 20:52:00,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-21 20:52:00,737 INFO L87 Difference]: Start difference. First operand 591 states and 2124 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:00,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:52:00,790 INFO L93 Difference]: Finished difference Result 783 states and 2748 transitions. [2021-05-21 20:52:00,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 20:52:00,791 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-21 20:52:00,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:52:00,795 INFO L225 Difference]: With dead ends: 783 [2021-05-21 20:52:00,795 INFO L226 Difference]: Without dead ends: 783 [2021-05-21 20:52:00,795 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 25.0ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:52:00,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2021-05-21 20:52:00,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 582. [2021-05-21 20:52:00,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 581 states have (on average 3.604130808950086) internal successors, (2094), 581 states have internal predecessors, (2094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:00,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 2094 transitions. [2021-05-21 20:52:00,812 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 2094 transitions. Word has length 24 [2021-05-21 20:52:00,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:52:00,813 INFO L482 AbstractCegarLoop]: Abstraction has 582 states and 2094 transitions. [2021-05-21 20:52:00,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:00,813 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 2094 transitions. [2021-05-21 20:52:00,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-21 20:52:00,814 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:52:00,814 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:52:01,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-21 20:52:01,035 INFO L430 AbstractCegarLoop]: === Iteration 15 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:52:01,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:52:01,035 INFO L82 PathProgramCache]: Analyzing trace with hash 831548115, now seen corresponding path program 6 times [2021-05-21 20:52:01,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:52:01,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980243644] [2021-05-21 20:52:01,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:52:01,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:01,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:01,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:52:01,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980243644] [2021-05-21 20:52:01,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980243644] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 20:52:01,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 20:52:01,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-21 20:52:01,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991544898] [2021-05-21 20:52:01,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-21 20:52:01,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:52:01,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-21 20:52:01,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-21 20:52:01,054 INFO L87 Difference]: Start difference. First operand 582 states and 2094 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:01,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:52:01,114 INFO L93 Difference]: Finished difference Result 597 states and 2122 transitions. [2021-05-21 20:52:01,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 20:52:01,114 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-21 20:52:01,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:52:01,117 INFO L225 Difference]: With dead ends: 597 [2021-05-21 20:52:01,117 INFO L226 Difference]: Without dead ends: 565 [2021-05-21 20:52:01,118 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 24.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:52:01,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-05-21 20:52:01,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 565. [2021-05-21 20:52:01,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 564 states have (on average 3.6382978723404253) internal successors, (2052), 564 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:01,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 2052 transitions. [2021-05-21 20:52:01,133 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 2052 transitions. Word has length 24 [2021-05-21 20:52:01,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:52:01,133 INFO L482 AbstractCegarLoop]: Abstraction has 565 states and 2052 transitions. [2021-05-21 20:52:01,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:01,133 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 2052 transitions. [2021-05-21 20:52:01,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-21 20:52:01,135 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:52:01,135 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:52:01,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-05-21 20:52:01,135 INFO L430 AbstractCegarLoop]: === Iteration 16 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:52:01,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:52:01,136 INFO L82 PathProgramCache]: Analyzing trace with hash -293162627, now seen corresponding path program 7 times [2021-05-21 20:52:01,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:52:01,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447289808] [2021-05-21 20:52:01,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:52:01,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:01,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:01,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:52:01,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447289808] [2021-05-21 20:52:01,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447289808] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:01,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212791592] [2021-05-21 20:52:01,155 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:01,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:01,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-21 20:52:01,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:52:01,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:01,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212791592] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:01,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 20:52:01,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-05-21 20:52:01,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735616493] [2021-05-21 20:52:01,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 20:52:01,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 20:52:01,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 20:52:01,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-21 20:52:01,249 INFO L87 Difference]: Start difference. First operand 565 states and 2052 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 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) [2021-05-21 20:52:01,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 20:52:01,311 INFO L93 Difference]: Finished difference Result 595 states and 2146 transitions. [2021-05-21 20:52:01,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 20:52:01,311 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 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) Word has length 24 [2021-05-21 20:52:01,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 20:52:01,314 INFO L225 Difference]: With dead ends: 595 [2021-05-21 20:52:01,314 INFO L226 Difference]: Without dead ends: 595 [2021-05-21 20:52:01,315 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 23.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-21 20:52:01,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-05-21 20:52:01,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 487. [2021-05-21 20:52:01,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 3.625514403292181) internal successors, (1762), 486 states have internal predecessors, (1762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 20:52:01,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 1762 transitions. [2021-05-21 20:52:01,330 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 1762 transitions. Word has length 24 [2021-05-21 20:52:01,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 20:52:01,331 INFO L482 AbstractCegarLoop]: Abstraction has 487 states and 1762 transitions. [2021-05-21 20:52:01,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 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) [2021-05-21 20:52:01,331 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 1762 transitions. [2021-05-21 20:52:01,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-21 20:52:01,332 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 20:52:01,332 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 20:52:01,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:01,546 INFO L430 AbstractCegarLoop]: === Iteration 17 === [thread1Thread1of1ForFork0Err4INUSE_VIOLATION, ULTIMATE.startErr9INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Err8INUSE_VIOLATION, thread4Err5INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork0Err3INUSE_VIOLATION, thread4Thread1of1ForFork1Err1INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 20:52:01,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 20:52:01,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1216404668, now seen corresponding path program 1 times [2021-05-21 20:52:01,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 20:52:01,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804771383] [2021-05-21 20:52:01,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 20:52:01,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:01,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 20:52:01,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 20:52:01,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804771383] [2021-05-21 20:52:01,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804771383] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 20:52:01,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274447248] [2021-05-21 20:52:01,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 20:52:01,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 20:52:01,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-21 20:52:01,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 20:52:01,794 WARN L348 FreeRefinementEngine]: Global settings require throwing the following exception [2021-05-21 20:52:02,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-21 20:52:02,017 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.EqualityInformation.getEqinfo(EqualityInformation.java:130) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.XnfDer.derSimple(XnfDer.java:308) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.XnfDer.tryToEliminate_EqInfoBased(XnfDer.java:138) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.XnfDer.tryToEliminate(XnfDer.java:101) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:255) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.tryToEliminate(PartialQuantifierElimination.java:100) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:246) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:440) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:201) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:297) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:190) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:180) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:439) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:374) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:69) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:63) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:371) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:307) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:236) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-05-21 20:52:02,020 INFO L168 Benchmark]: Toolchain (without parser) took 5841.49 ms. Allocated memory was 377.5 MB in the beginning and 501.2 MB in the end (delta: 123.7 MB). Free memory was 357.4 MB in the beginning and 425.0 MB in the end (delta: -67.6 MB). Peak memory consumption was 59.1 MB. Max. memory is 16.0 GB. [2021-05-21 20:52:02,020 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.17 ms. Allocated memory is still 377.5 MB. Free memory was 358.7 MB in the beginning and 358.6 MB in the end (delta: 71.4 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-21 20:52:02,020 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.80 ms. Allocated memory is still 377.5 MB. Free memory was 357.4 MB in the beginning and 355.9 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-21 20:52:02,020 INFO L168 Benchmark]: Boogie Preprocessor took 20.55 ms. Allocated memory is still 377.5 MB. Free memory was 355.9 MB in the beginning and 354.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. [2021-05-21 20:52:02,020 INFO L168 Benchmark]: RCFGBuilder took 308.66 ms. Allocated memory is still 377.5 MB. Free memory was 354.8 MB in the beginning and 336.7 MB in the end (delta: 18.1 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.0 GB. [2021-05-21 20:52:02,020 INFO L168 Benchmark]: TraceAbstraction took 5470.08 ms. Allocated memory was 377.5 MB in the beginning and 501.2 MB in the end (delta: 123.7 MB). Free memory was 362.4 MB in the beginning and 425.0 MB in the end (delta: -62.6 MB). Peak memory consumption was 61.1 MB. Max. memory is 16.0 GB. [2021-05-21 20:52:02,021 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.17 ms. Allocated memory is still 377.5 MB. Free memory was 358.7 MB in the beginning and 358.6 MB in the end (delta: 71.4 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 25.80 ms. Allocated memory is still 377.5 MB. Free memory was 357.4 MB in the beginning and 355.9 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 20.55 ms. Allocated memory is still 377.5 MB. Free memory was 355.9 MB in the beginning and 354.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. * RCFGBuilder took 308.66 ms. Allocated memory is still 377.5 MB. Free memory was 354.8 MB in the beginning and 336.7 MB in the end (delta: 18.1 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.0 GB. * TraceAbstraction took 5470.08 ms. Allocated memory was 377.5 MB in the beginning and 501.2 MB in the end (delta: 123.7 MB). Free memory was 362.4 MB in the beginning and 425.0 MB in the end (delta: -62.6 MB). Peak memory consumption was 61.1 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.EqualityInformation.getEqinfo(EqualityInformation.java:130) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...