/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/popl20/mult-4.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d47b94137d5c7dd60722882962a90fb345e61909-d47b941 [2021-05-03 15:32:25,799 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-03 15:32:25,803 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-03 15:32:25,850 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-03 15:32:25,850 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-03 15:32:25,855 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-03 15:32:25,858 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-03 15:32:25,864 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-03 15:32:25,866 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-03 15:32:25,867 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-03 15:32:25,868 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-03 15:32:25,869 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-03 15:32:25,870 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-03 15:32:25,874 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-03 15:32:25,875 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-03 15:32:25,876 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-03 15:32:25,877 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-03 15:32:25,878 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-03 15:32:25,879 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-03 15:32:25,881 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-03 15:32:25,883 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-03 15:32:25,889 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-03 15:32:25,890 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-03 15:32:25,892 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-03 15:32:25,894 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-03 15:32:25,894 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-03 15:32:25,895 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-03 15:32:25,896 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-03 15:32:25,896 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-03 15:32:25,897 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-03 15:32:25,898 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-03 15:32:25,898 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-03 15:32:25,899 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-03 15:32:25,900 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-03 15:32:25,901 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-03 15:32:25,901 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-03 15:32:25,902 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-03 15:32:25,902 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-03 15:32:25,902 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-03 15:32:25,903 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-03 15:32:25,903 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-03 15:32:26,060 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-05-03 15:32:26,092 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-03 15:32:26,093 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-03 15:32:26,094 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-03 15:32:26,094 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-03 15:32:26,097 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-03 15:32:26,098 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-03 15:32:26,098 INFO L138 SettingsManager]: * Use SBE=true [2021-05-03 15:32:26,098 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-03 15:32:26,098 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-03 15:32:26,098 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-03 15:32:26,100 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-03 15:32:26,100 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-03 15:32:26,100 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-03 15:32:26,100 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-03 15:32:26,100 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-03 15:32:26,100 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-03 15:32:26,100 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-03 15:32:26,101 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-03 15:32:26,101 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-03 15:32:26,101 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-03 15:32:26,101 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-03 15:32:26,101 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-03 15:32:26,101 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-03 15:32:26,101 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 15:32:26,101 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-03 15:32:26,102 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-03 15:32:26,102 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-03 15:32:26,102 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-03 15:32:26,102 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-03 15:32:26,103 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-03 15:32:26,103 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-03 15:32:26,103 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-03 15:32:26,545 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-03 15:32:26,570 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-03 15:32:26,574 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-03 15:32:26,576 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-03 15:32:26,577 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-03 15:32:26,579 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/mult-4.wvr.bpl [2021-05-03 15:32:26,579 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/mult-4.wvr.bpl' [2021-05-03 15:32:26,625 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-03 15:32:26,627 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-03 15:32:26,629 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-03 15:32:26,629 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-03 15:32:26,629 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-03 15:32:26,643 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:32:26" (1/1) ... [2021-05-03 15:32:26,653 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:32:26" (1/1) ... [2021-05-03 15:32:26,662 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-03 15:32:26,665 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-03 15:32:26,665 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-03 15:32:26,666 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-03 15:32:26,674 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:32:26" (1/1) ... [2021-05-03 15:32:26,675 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:32:26" (1/1) ... [2021-05-03 15:32:26,676 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:32:26" (1/1) ... [2021-05-03 15:32:26,676 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:32:26" (1/1) ... [2021-05-03 15:32:26,681 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:32:26" (1/1) ... [2021-05-03 15:32:26,687 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:32:26" (1/1) ... [2021-05-03 15:32:26,688 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:32:26" (1/1) ... [2021-05-03 15:32:26,694 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-03 15:32:26,696 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-03 15:32:26,696 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-03 15:32:26,697 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-03 15:32:26,700 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:32:26" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 15:32:26,799 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-03 15:32:26,800 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-03 15:32:26,800 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-03 15:32:26,800 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-03 15:32:26,800 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-03 15:32:26,800 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-03 15:32:26,801 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-03 15:32:26,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-03 15:32:26,801 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-03 15:32:26,801 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-05-03 15:32:26,801 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-05-03 15:32:26,801 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-05-03 15:32:26,803 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-05-03 15:32:26,804 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-05-03 15:32:26,804 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-05-03 15:32:26,805 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-03 15:32:27,059 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-03 15:32:27,059 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-03 15:32:27,061 INFO L202 PluginConnector]: Adding new model mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 03:32:27 BoogieIcfgContainer [2021-05-03 15:32:27,062 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-03 15:32:27,064 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-03 15:32:27,064 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-03 15:32:27,067 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-03 15:32:27,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:32:26" (1/2) ... [2021-05-03 15:32:27,069 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f82ad0a and model type mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 03:32:27, skipping insertion in model container [2021-05-03 15:32:27,069 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 03:32:27" (2/2) ... [2021-05-03 15:32:27,071 INFO L111 eAbstractionObserver]: Analyzing ICFG mult-4.wvr.bpl [2021-05-03 15:32:27,077 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-03 15:32:27,077 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-03 15:32:27,081 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-03 15:32:27,082 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-03 15:32:27,151 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-05-03 15:32:27,180 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-05-03 15:32:27,201 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-03 15:32:27,203 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-03 15:32:27,203 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-03 15:32:27,203 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-03 15:32:27,203 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-03 15:32:27,203 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-03 15:32:27,203 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-03 15:32:27,208 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-03 15:32:27,219 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 45 places, 36 transitions, 104 flow [2021-05-03 15:32:27,286 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 434 states, 432 states have (on average 3.837962962962963) internal successors, (1658), 433 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:32:27,291 INFO L276 IsEmpty]: Start isEmpty. Operand has 434 states, 432 states have (on average 3.837962962962963) internal successors, (1658), 433 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:32:27,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 15:32:27,310 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:32:27,310 INFO L551 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] [2021-05-03 15:32:27,311 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:32:27,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:32:27,316 INFO L82 PathProgramCache]: Analyzing trace with hash -305625672, now seen corresponding path program 1 times [2021-05-03 15:32:27,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:32:27,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123060919] [2021-05-03 15:32:27,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:32:27,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:32:27,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:32:27,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123060919] [2021-05-03 15:32:27,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 15:32:27,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 15:32:27,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456194969] [2021-05-03 15:32:27,537 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-03 15:32:27,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:32:27,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-03 15:32:27,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 15:32:27,559 INFO L87 Difference]: Start difference. First operand has 434 states, 432 states have (on average 3.837962962962963) internal successors, (1658), 433 states have internal predecessors, (1658), 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 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 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) [2021-05-03 15:32:27,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:32:27,676 INFO L93 Difference]: Finished difference Result 857 states and 3120 transitions. [2021-05-03 15:32:27,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-03 15:32:27,677 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 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 [2021-05-03 15:32:27,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:32:27,706 INFO L225 Difference]: With dead ends: 857 [2021-05-03 15:32:27,707 INFO L226 Difference]: Without dead ends: 732 [2021-05-03 15:32:27,708 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 15:32:27,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2021-05-03 15:32:27,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 698. [2021-05-03 15:32:27,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 697 states have (on average 3.720229555236729) internal successors, (2593), 697 states have internal predecessors, (2593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:32:27,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 2593 transitions. [2021-05-03 15:32:27,844 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 2593 transitions. Word has length 22 [2021-05-03 15:32:27,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:32:27,846 INFO L480 AbstractCegarLoop]: Abstraction has 698 states and 2593 transitions. [2021-05-03 15:32:27,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 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) [2021-05-03 15:32:27,847 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 2593 transitions. [2021-05-03 15:32:27,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 15:32:27,855 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:32:27,856 INFO L551 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] [2021-05-03 15:32:27,856 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-03 15:32:27,856 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:32:27,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:32:27,861 INFO L82 PathProgramCache]: Analyzing trace with hash 678047094, now seen corresponding path program 1 times [2021-05-03 15:32:27,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:32:27,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953808943] [2021-05-03 15:32:27,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:32:27,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:32:28,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:32:28,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953808943] [2021-05-03 15:32:28,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32742215] [2021-05-03 15:32:28,033 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 [2021-05-03 15:32:28,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:32:28,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-03 15:32:28,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:32:28,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:32:28,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:32:28,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2021-05-03 15:32:28,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410210336] [2021-05-03 15:32:28,330 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 15:32:28,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:32:28,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 15:32:28,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-03 15:32:28,333 INFO L87 Difference]: Start difference. First operand 698 states and 2593 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:32:28,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:32:28,475 INFO L93 Difference]: Finished difference Result 1139 states and 4149 transitions. [2021-05-03 15:32:28,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 15:32:28,476 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 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 [2021-05-03 15:32:28,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:32:28,487 INFO L225 Difference]: With dead ends: 1139 [2021-05-03 15:32:28,487 INFO L226 Difference]: Without dead ends: 1139 [2021-05-03 15:32:28,489 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 101.9ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-03 15:32:28,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2021-05-03 15:32:28,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 788. [2021-05-03 15:32:28,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 787 states have (on average 3.7255400254129607) internal successors, (2932), 787 states have internal predecessors, (2932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:32:28,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 2932 transitions. [2021-05-03 15:32:28,540 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 2932 transitions. Word has length 24 [2021-05-03 15:32:28,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:32:28,541 INFO L480 AbstractCegarLoop]: Abstraction has 788 states and 2932 transitions. [2021-05-03 15:32:28,541 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:32:28,542 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 2932 transitions. [2021-05-03 15:32:28,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 15:32:28,547 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:32:28,548 INFO L551 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] [2021-05-03 15:32:28,761 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-03 15:32:28,761 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:32:28,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:32:28,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1310430090, now seen corresponding path program 1 times [2021-05-03 15:32:28,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:32:28,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536893356] [2021-05-03 15:32:28,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:32:28,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:32:28,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:32:28,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536893356] [2021-05-03 15:32:28,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 15:32:28,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-03 15:32:28,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963077014] [2021-05-03 15:32:28,814 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 15:32:28,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:32:28,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 15:32:28,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-03 15:32:28,815 INFO L87 Difference]: Start difference. First operand 788 states and 2932 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 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) [2021-05-03 15:32:28,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:32:28,873 INFO L93 Difference]: Finished difference Result 732 states and 2639 transitions. [2021-05-03 15:32:28,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 15:32:28,873 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 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 [2021-05-03 15:32:28,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:32:28,878 INFO L225 Difference]: With dead ends: 732 [2021-05-03 15:32:28,879 INFO L226 Difference]: Without dead ends: 622 [2021-05-03 15:32:28,879 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 34.6ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-05-03 15:32:28,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2021-05-03 15:32:28,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 614. [2021-05-03 15:32:28,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 613 states have (on average 3.8140293637846656) internal successors, (2338), 613 states have internal predecessors, (2338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:32:28,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 2338 transitions. [2021-05-03 15:32:28,912 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 2338 transitions. Word has length 24 [2021-05-03 15:32:28,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:32:28,912 INFO L480 AbstractCegarLoop]: Abstraction has 614 states and 2338 transitions. [2021-05-03 15:32:28,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 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) [2021-05-03 15:32:28,913 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 2338 transitions. [2021-05-03 15:32:28,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 15:32:28,917 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:32:28,917 INFO L551 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] [2021-05-03 15:32:28,917 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-03 15:32:28,917 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:32:28,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:32:28,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1537471606, now seen corresponding path program 2 times [2021-05-03 15:32:28,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:32:28,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329105094] [2021-05-03 15:32:28,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:32:28,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:32:29,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:32:29,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329105094] [2021-05-03 15:32:29,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933390613] [2021-05-03 15:32:29,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2021-05-03 15:32:29,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:32:29,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:32:29,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-03 15:32:29,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:32:29,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:32:29,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:32:29,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2021-05-03 15:32:29,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146464411] [2021-05-03 15:32:29,203 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 15:32:29,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:32:29,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 15:32:29,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-03 15:32:29,204 INFO L87 Difference]: Start difference. First operand 614 states and 2338 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 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) [2021-05-03 15:32:29,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:32:29,279 INFO L93 Difference]: Finished difference Result 782 states and 3002 transitions. [2021-05-03 15:32:29,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 15:32:29,279 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 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 [2021-05-03 15:32:29,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:32:29,288 INFO L225 Difference]: With dead ends: 782 [2021-05-03 15:32:29,288 INFO L226 Difference]: Without dead ends: 782 [2021-05-03 15:32:29,289 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 61.7ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-03 15:32:29,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2021-05-03 15:32:29,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 690. [2021-05-03 15:32:29,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 690 states, 689 states have (on average 3.8403483309143684) internal successors, (2646), 689 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:32:29,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 2646 transitions. [2021-05-03 15:32:29,319 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 2646 transitions. Word has length 24 [2021-05-03 15:32:29,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:32:29,320 INFO L480 AbstractCegarLoop]: Abstraction has 690 states and 2646 transitions. [2021-05-03 15:32:29,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 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) [2021-05-03 15:32:29,320 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 2646 transitions. [2021-05-03 15:32:29,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 15:32:29,324 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:32:29,324 INFO L551 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] [2021-05-03 15:32:29,539 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:32:29,539 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:32:29,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:32:29,539 INFO L82 PathProgramCache]: Analyzing trace with hash -893707084, now seen corresponding path program 1 times [2021-05-03 15:32:29,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:32:29,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895355311] [2021-05-03 15:32:29,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:32:29,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:32:29,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 15:32:29,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895355311] [2021-05-03 15:32:29,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722450146] [2021-05-03 15:32:29,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-03 15:32:29,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:32:29,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-03 15:32:29,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:32:29,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 15:32:29,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:32:29,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2021-05-03 15:32:29,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108804359] [2021-05-03 15:32:29,722 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 15:32:29,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:32:29,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 15:32:29,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-03 15:32:29,723 INFO L87 Difference]: Start difference. First operand 690 states and 2646 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 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) [2021-05-03 15:32:29,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:32:29,799 INFO L93 Difference]: Finished difference Result 1377 states and 5182 transitions. [2021-05-03 15:32:29,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 15:32:29,800 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 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 26 [2021-05-03 15:32:29,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:32:29,813 INFO L225 Difference]: With dead ends: 1377 [2021-05-03 15:32:29,813 INFO L226 Difference]: Without dead ends: 1377 [2021-05-03 15:32:29,813 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 54.5ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-03 15:32:29,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1377 states. [2021-05-03 15:32:29,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1377 to 834. [2021-05-03 15:32:29,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 833 states have (on average 3.8739495798319328) internal successors, (3227), 833 states have internal predecessors, (3227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:32:29,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 3227 transitions. [2021-05-03 15:32:29,861 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 3227 transitions. Word has length 26 [2021-05-03 15:32:29,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:32:29,862 INFO L480 AbstractCegarLoop]: Abstraction has 834 states and 3227 transitions. [2021-05-03 15:32:29,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 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) [2021-05-03 15:32:29,863 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 3227 transitions. [2021-05-03 15:32:29,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 15:32:29,866 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:32:29,867 INFO L551 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] [2021-05-03 15:32:30,080 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:32:30,081 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:32:30,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:32:30,081 INFO L82 PathProgramCache]: Analyzing trace with hash 400399100, now seen corresponding path program 2 times [2021-05-03 15:32:30,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:32:30,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763136322] [2021-05-03 15:32:30,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:32:30,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:32:30,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 15:32:30,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763136322] [2021-05-03 15:32:30,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125467963] [2021-05-03 15:32:30,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2021-05-03 15:32:30,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:32:30,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:32:30,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 15:32:30,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:32:30,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 15:32:30,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:32:30,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2021-05-03 15:32:30,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744257292] [2021-05-03 15:32:30,326 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 15:32:30,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:32:30,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 15:32:30,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-03 15:32:30,327 INFO L87 Difference]: Start difference. First operand 834 states and 3227 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 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) [2021-05-03 15:32:30,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:32:30,392 INFO L93 Difference]: Finished difference Result 1397 states and 5229 transitions. [2021-05-03 15:32:30,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 15:32:30,396 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 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 26 [2021-05-03 15:32:30,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:32:30,407 INFO L225 Difference]: With dead ends: 1397 [2021-05-03 15:32:30,407 INFO L226 Difference]: Without dead ends: 1397 [2021-05-03 15:32:30,408 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 59.5ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-03 15:32:30,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1397 states. [2021-05-03 15:32:30,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1397 to 834. [2021-05-03 15:32:30,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 833 states have (on average 3.843937575030012) internal successors, (3202), 833 states have internal predecessors, (3202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:32:30,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 3202 transitions. [2021-05-03 15:32:30,453 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 3202 transitions. Word has length 26 [2021-05-03 15:32:30,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:32:30,454 INFO L480 AbstractCegarLoop]: Abstraction has 834 states and 3202 transitions. [2021-05-03 15:32:30,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 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) [2021-05-03 15:32:30,454 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 3202 transitions. [2021-05-03 15:32:30,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 15:32:30,458 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:32:30,459 INFO L551 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] [2021-05-03 15:32:30,685 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:32:30,685 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:32:30,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:32:30,686 INFO L82 PathProgramCache]: Analyzing trace with hash -832220860, now seen corresponding path program 3 times [2021-05-03 15:32:30,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:32:30,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860781525] [2021-05-03 15:32:30,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:32:30,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:32:30,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 15:32:30,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860781525] [2021-05-03 15:32:30,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 15:32:30,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-03 15:32:30,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847598161] [2021-05-03 15:32:30,761 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 15:32:30,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:32:30,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 15:32:30,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-03 15:32:30,762 INFO L87 Difference]: Start difference. First operand 834 states and 3202 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:32:30,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:32:30,815 INFO L93 Difference]: Finished difference Result 958 states and 3592 transitions. [2021-05-03 15:32:30,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 15:32:30,815 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-05-03 15:32:30,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:32:30,823 INFO L225 Difference]: With dead ends: 958 [2021-05-03 15:32:30,823 INFO L226 Difference]: Without dead ends: 878 [2021-05-03 15:32:30,824 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 18.3ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-05-03 15:32:30,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2021-05-03 15:32:30,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 802. [2021-05-03 15:32:30,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 802 states, 801 states have (on average 3.857677902621723) internal successors, (3090), 801 states have internal predecessors, (3090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:32:30,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 802 states to 802 states and 3090 transitions. [2021-05-03 15:32:30,865 INFO L78 Accepts]: Start accepts. Automaton has 802 states and 3090 transitions. Word has length 26 [2021-05-03 15:32:30,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:32:30,867 INFO L480 AbstractCegarLoop]: Abstraction has 802 states and 3090 transitions. [2021-05-03 15:32:30,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:32:30,868 INFO L276 IsEmpty]: Start isEmpty. Operand 802 states and 3090 transitions. [2021-05-03 15:32:30,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 15:32:30,873 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:32:30,873 INFO L551 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, 1, 1] [2021-05-03 15:32:30,873 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-03 15:32:30,874 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:32:30,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:32:30,874 INFO L82 PathProgramCache]: Analyzing trace with hash -322922564, now seen corresponding path program 1 times [2021-05-03 15:32:30,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:32:30,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408120275] [2021-05-03 15:32:30,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:32:30,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:32:30,969 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 15:32:30,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408120275] [2021-05-03 15:32:30,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361408112] [2021-05-03 15:32:30,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-03 15:32:31,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:32:31,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-03 15:32:31,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:32:31,064 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 15:32:31,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:32:31,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2021-05-03 15:32:31,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234638232] [2021-05-03 15:32:31,066 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 15:32:31,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:32:31,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 15:32:31,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-05-03 15:32:31,067 INFO L87 Difference]: Start difference. First operand 802 states and 3090 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:32:31,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:32:31,157 INFO L93 Difference]: Finished difference Result 1509 states and 5726 transitions. [2021-05-03 15:32:31,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 15:32:31,157 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 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 28 [2021-05-03 15:32:31,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:32:31,170 INFO L225 Difference]: With dead ends: 1509 [2021-05-03 15:32:31,170 INFO L226 Difference]: Without dead ends: 1509 [2021-05-03 15:32:31,170 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 66.7ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-03 15:32:31,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1509 states. [2021-05-03 15:32:31,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1509 to 953. [2021-05-03 15:32:31,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 953 states, 952 states have (on average 3.889705882352941) internal successors, (3703), 952 states have internal predecessors, (3703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:32:31,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953 states to 953 states and 3703 transitions. [2021-05-03 15:32:31,221 INFO L78 Accepts]: Start accepts. Automaton has 953 states and 3703 transitions. Word has length 28 [2021-05-03 15:32:31,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:32:31,222 INFO L480 AbstractCegarLoop]: Abstraction has 953 states and 3703 transitions. [2021-05-03 15:32:31,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:32:31,222 INFO L276 IsEmpty]: Start isEmpty. Operand 953 states and 3703 transitions. [2021-05-03 15:32:31,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 15:32:31,227 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:32:31,227 INFO L551 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, 1, 1] [2021-05-03 15:32:31,453 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:32:31,453 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:32:31,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:32:31,453 INFO L82 PathProgramCache]: Analyzing trace with hash -210647880, now seen corresponding path program 2 times [2021-05-03 15:32:31,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:32:31,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161140867] [2021-05-03 15:32:31,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:32:31,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:32:31,517 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 15:32:31,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161140867] [2021-05-03 15:32:31,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010982725] [2021-05-03 15:32:31,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2021-05-03 15:32:31,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:32:31,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:32:31,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-03 15:32:31,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:32:31,647 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 15:32:31,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-05-03 15:32:31,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-05-03 15:32:31,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316724385] [2021-05-03 15:32:31,649 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 15:32:31,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:32:31,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 15:32:31,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-03 15:32:31,652 INFO L87 Difference]: Start difference. First operand 953 states and 3703 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:32:31,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:32:31,705 INFO L93 Difference]: Finished difference Result 1136 states and 4368 transitions. [2021-05-03 15:32:31,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 15:32:31,708 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-03 15:32:31,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:32:31,716 INFO L225 Difference]: With dead ends: 1136 [2021-05-03 15:32:31,717 INFO L226 Difference]: Without dead ends: 1088 [2021-05-03 15:32:31,717 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 53.8ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-03 15:32:31,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1088 states. [2021-05-03 15:32:31,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1088 to 937. [2021-05-03 15:32:31,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 937 states, 936 states have (on average 3.8792735042735043) internal successors, (3631), 936 states have internal predecessors, (3631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:32:31,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 3631 transitions. [2021-05-03 15:32:31,762 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 3631 transitions. Word has length 28 [2021-05-03 15:32:31,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:32:31,762 INFO L480 AbstractCegarLoop]: Abstraction has 937 states and 3631 transitions. [2021-05-03 15:32:31,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:32:31,763 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 3631 transitions. [2021-05-03 15:32:31,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-03 15:32:31,767 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:32:31,768 INFO L551 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, 1, 1, 1, 1] [2021-05-03 15:32:31,992 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:32:31,993 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:32:31,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:32:31,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1950742974, now seen corresponding path program 1 times [2021-05-03 15:32:31,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:32:31,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512037938] [2021-05-03 15:32:31,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:32:32,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:32:32,096 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 15:32:32,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512037938] [2021-05-03 15:32:32,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305928572] [2021-05-03 15:32:32,097 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 [2021-05-03 15:32:32,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:32:32,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-03 15:32:32,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:32:32,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 15:32:32,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:32:32,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-05-03 15:32:32,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356308661] [2021-05-03 15:32:32,251 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 15:32:32,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:32:32,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 15:32:32,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-03 15:32:32,252 INFO L87 Difference]: Start difference. First operand 937 states and 3631 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:32:32,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:32:32,434 INFO L93 Difference]: Finished difference Result 4025 states and 15417 transitions. [2021-05-03 15:32:32,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 15:32:32,435 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 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 30 [2021-05-03 15:32:32,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:32:32,462 INFO L225 Difference]: With dead ends: 4025 [2021-05-03 15:32:32,463 INFO L226 Difference]: Without dead ends: 3705 [2021-05-03 15:32:32,463 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 67.4ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-03 15:32:32,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3705 states. [2021-05-03 15:32:32,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3705 to 2630. [2021-05-03 15:32:32,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2630 states, 2629 states have (on average 3.9790794979079496) internal successors, (10461), 2629 states have internal predecessors, (10461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:32:32,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2630 states to 2630 states and 10461 transitions. [2021-05-03 15:32:32,603 INFO L78 Accepts]: Start accepts. Automaton has 2630 states and 10461 transitions. Word has length 30 [2021-05-03 15:32:32,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:32:32,603 INFO L480 AbstractCegarLoop]: Abstraction has 2630 states and 10461 transitions. [2021-05-03 15:32:32,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:32:32,604 INFO L276 IsEmpty]: Start isEmpty. Operand 2630 states and 10461 transitions. [2021-05-03 15:32:32,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-03 15:32:32,617 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:32:32,617 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1] [2021-05-03 15:32:32,836 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-03 15:32:32,837 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:32:32,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:32:32,837 INFO L82 PathProgramCache]: Analyzing trace with hash 756745084, now seen corresponding path program 2 times [2021-05-03 15:32:32,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:32:32,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752533235] [2021-05-03 15:32:32,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:32:32,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:32:32,910 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 15:32:32,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752533235] [2021-05-03 15:32:32,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182017158] [2021-05-03 15:32:32,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:32:32,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:32:32,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:32:32,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 15:32:32,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:32:33,069 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 15:32:33,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:32:33,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-05-03 15:32:33,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248435153] [2021-05-03 15:32:33,071 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 15:32:33,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:32:33,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 15:32:33,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-03 15:32:33,072 INFO L87 Difference]: Start difference. First operand 2630 states and 10461 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:32:33,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:32:33,493 INFO L93 Difference]: Finished difference Result 11823 states and 45853 transitions. [2021-05-03 15:32:33,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 15:32:33,494 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 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 32 [2021-05-03 15:32:33,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:32:33,575 INFO L225 Difference]: With dead ends: 11823 [2021-05-03 15:32:33,575 INFO L226 Difference]: Without dead ends: 11823 [2021-05-03 15:32:33,576 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 203.0ms TimeCoverageRelationStatistics Valid=134, Invalid=328, Unknown=0, NotChecked=0, Total=462 [2021-05-03 15:32:33,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11823 states. [2021-05-03 15:32:33,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11823 to 4060. [2021-05-03 15:32:33,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4060 states, 4059 states have (on average 4.138950480413895) internal successors, (16800), 4059 states have internal predecessors, (16800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:32:33,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4060 states to 4060 states and 16800 transitions. [2021-05-03 15:32:33,972 INFO L78 Accepts]: Start accepts. Automaton has 4060 states and 16800 transitions. Word has length 32 [2021-05-03 15:32:33,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:32:33,973 INFO L480 AbstractCegarLoop]: Abstraction has 4060 states and 16800 transitions. [2021-05-03 15:32:33,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:32:33,973 INFO L276 IsEmpty]: Start isEmpty. Operand 4060 states and 16800 transitions. [2021-05-03 15:32:33,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-03 15:32:33,996 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:32:33,996 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1] [2021-05-03 15:32:34,217 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-03 15:32:34,217 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:32:34,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:32:34,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1287025088, now seen corresponding path program 3 times [2021-05-03 15:32:34,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:32:34,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790000586] [2021-05-03 15:32:34,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:32:34,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:32:34,348 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 15:32:34,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790000586] [2021-05-03 15:32:34,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871355772] [2021-05-03 15:32:34,349 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:32:34,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 15:32:34,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:32:34,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 15:32:34,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:32:34,545 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 15:32:34,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:32:34,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-05-03 15:32:34,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919424177] [2021-05-03 15:32:34,547 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 15:32:34,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:32:34,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 15:32:34,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-03 15:32:34,548 INFO L87 Difference]: Start difference. First operand 4060 states and 16800 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:32:35,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:32:35,506 INFO L93 Difference]: Finished difference Result 18640 states and 72700 transitions. [2021-05-03 15:32:35,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 15:32:35,506 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 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 32 [2021-05-03 15:32:35,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:32:35,722 INFO L225 Difference]: With dead ends: 18640 [2021-05-03 15:32:35,723 INFO L226 Difference]: Without dead ends: 17252 [2021-05-03 15:32:35,723 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 461.3ms TimeCoverageRelationStatistics Valid=285, Invalid=905, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 15:32:35,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17252 states. [2021-05-03 15:32:36,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17252 to 8566. [2021-05-03 15:32:36,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8566 states, 8565 states have (on average 4.2192644483362525) internal successors, (36138), 8565 states have internal predecessors, (36138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:32:36,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8566 states to 8566 states and 36138 transitions. [2021-05-03 15:32:36,323 INFO L78 Accepts]: Start accepts. Automaton has 8566 states and 36138 transitions. Word has length 32 [2021-05-03 15:32:36,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:32:36,323 INFO L480 AbstractCegarLoop]: Abstraction has 8566 states and 36138 transitions. [2021-05-03 15:32:36,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:32:36,324 INFO L276 IsEmpty]: Start isEmpty. Operand 8566 states and 36138 transitions. [2021-05-03 15:32:36,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-03 15:32:36,447 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:32:36,447 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1] [2021-05-03 15:32:36,669 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:32:36,669 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:32:36,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:32:36,670 INFO L82 PathProgramCache]: Analyzing trace with hash -402067132, now seen corresponding path program 4 times [2021-05-03 15:32:36,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:32:36,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418575601] [2021-05-03 15:32:36,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:32:36,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:32:36,744 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 15:32:36,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418575601] [2021-05-03 15:32:36,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756153371] [2021-05-03 15:32:36,745 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:32:36,850 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:32:36,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:32:36,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 15:32:36,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:32:36,939 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 15:32:36,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:32:36,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-05-03 15:32:36,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379305304] [2021-05-03 15:32:36,941 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 15:32:36,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:32:36,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 15:32:36,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-05-03 15:32:36,942 INFO L87 Difference]: Start difference. First operand 8566 states and 36138 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:32:37,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:32:37,161 INFO L93 Difference]: Finished difference Result 13296 states and 52964 transitions. [2021-05-03 15:32:37,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 15:32:37,169 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 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 32 [2021-05-03 15:32:37,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:32:37,251 INFO L225 Difference]: With dead ends: 13296 [2021-05-03 15:32:37,251 INFO L226 Difference]: Without dead ends: 13128 [2021-05-03 15:32:37,252 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 70.0ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-05-03 15:32:37,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13128 states. [2021-05-03 15:32:37,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13128 to 8482. [2021-05-03 15:32:37,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8482 states, 8481 states have (on average 4.17851668435326) internal successors, (35438), 8481 states have internal predecessors, (35438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:32:37,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8482 states to 8482 states and 35438 transitions. [2021-05-03 15:32:37,715 INFO L78 Accepts]: Start accepts. Automaton has 8482 states and 35438 transitions. Word has length 32 [2021-05-03 15:32:37,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:32:37,716 INFO L480 AbstractCegarLoop]: Abstraction has 8482 states and 35438 transitions. [2021-05-03 15:32:37,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:32:37,716 INFO L276 IsEmpty]: Start isEmpty. Operand 8482 states and 35438 transitions. [2021-05-03 15:32:37,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-03 15:32:37,754 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:32:37,754 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1] [2021-05-03 15:32:37,977 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:32:37,977 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:32:37,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:32:37,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1929237264, now seen corresponding path program 5 times [2021-05-03 15:32:37,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:32:37,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902078850] [2021-05-03 15:32:37,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:32:37,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:32:38,051 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 15:32:38,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902078850] [2021-05-03 15:32:38,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610750024] [2021-05-03 15:32:38,052 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:32:38,085 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 15:32:38,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:32:38,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 15:32:38,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:32:38,202 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 15:32:38,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:32:38,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-05-03 15:32:38,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721383968] [2021-05-03 15:32:38,203 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 15:32:38,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:32:38,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 15:32:38,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-05-03 15:32:38,205 INFO L87 Difference]: Start difference. First operand 8482 states and 35438 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:32:38,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:32:38,545 INFO L93 Difference]: Finished difference Result 17125 states and 69725 transitions. [2021-05-03 15:32:38,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 15:32:38,546 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-03 15:32:38,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:32:38,642 INFO L225 Difference]: With dead ends: 17125 [2021-05-03 15:32:38,642 INFO L226 Difference]: Without dead ends: 17125 [2021-05-03 15:32:38,642 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 87.6ms TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-05-03 15:32:38,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17125 states. [2021-05-03 15:32:39,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17125 to 10475. [2021-05-03 15:32:39,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10475 states, 10474 states have (on average 4.289765132709567) internal successors, (44931), 10474 states have internal predecessors, (44931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:32:39,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10475 states to 10475 states and 44931 transitions. [2021-05-03 15:32:39,214 INFO L78 Accepts]: Start accepts. Automaton has 10475 states and 44931 transitions. Word has length 32 [2021-05-03 15:32:39,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:32:39,214 INFO L480 AbstractCegarLoop]: Abstraction has 10475 states and 44931 transitions. [2021-05-03 15:32:39,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:32:39,214 INFO L276 IsEmpty]: Start isEmpty. Operand 10475 states and 44931 transitions. [2021-05-03 15:32:39,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-03 15:32:39,258 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:32:39,258 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1] [2021-05-03 15:32:39,473 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-03 15:32:39,473 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:32:39,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:32:39,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1951270200, now seen corresponding path program 6 times [2021-05-03 15:32:39,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:32:39,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245277162] [2021-05-03 15:32:39,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:32:39,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:32:39,620 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2021-05-03 15:32:39,651 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 15:32:39,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245277162] [2021-05-03 15:32:39,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199605716] [2021-05-03 15:32:39,652 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:32:39,681 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-03 15:32:39,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:32:39,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 15:32:39,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:32:39,772 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 15:32:39,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:32:39,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-05-03 15:32:39,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86871559] [2021-05-03 15:32:39,774 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 15:32:39,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:32:39,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 15:32:39,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-05-03 15:32:39,775 INFO L87 Difference]: Start difference. First operand 10475 states and 44931 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:32:40,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:32:40,185 INFO L93 Difference]: Finished difference Result 16571 states and 66710 transitions. [2021-05-03 15:32:40,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 15:32:40,189 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 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 32 [2021-05-03 15:32:40,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:32:40,290 INFO L225 Difference]: With dead ends: 16571 [2021-05-03 15:32:40,290 INFO L226 Difference]: Without dead ends: 16190 [2021-05-03 15:32:40,290 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 186.3ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-05-03 15:32:40,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16190 states. [2021-05-03 15:32:40,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16190 to 10209. [2021-05-03 15:32:40,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10209 states, 10208 states have (on average 4.278800940438871) internal successors, (43678), 10208 states have internal predecessors, (43678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:32:40,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10209 states to 10209 states and 43678 transitions. [2021-05-03 15:32:40,838 INFO L78 Accepts]: Start accepts. Automaton has 10209 states and 43678 transitions. Word has length 32 [2021-05-03 15:32:40,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:32:40,839 INFO L480 AbstractCegarLoop]: Abstraction has 10209 states and 43678 transitions. [2021-05-03 15:32:40,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:32:40,839 INFO L276 IsEmpty]: Start isEmpty. Operand 10209 states and 43678 transitions. [2021-05-03 15:32:40,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-03 15:32:40,875 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:32:40,875 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1] [2021-05-03 15:32:41,088 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-03 15:32:41,089 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:32:41,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:32:41,089 INFO L82 PathProgramCache]: Analyzing trace with hash -722377608, now seen corresponding path program 7 times [2021-05-03 15:32:41,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:32:41,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376550119] [2021-05-03 15:32:41,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:32:41,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:32:41,146 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 15:32:41,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376550119] [2021-05-03 15:32:41,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567048742] [2021-05-03 15:32:41,147 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:32:41,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:32:41,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 15:32:41,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:32:41,282 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 15:32:41,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:32:41,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-05-03 15:32:41,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191822780] [2021-05-03 15:32:41,283 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 15:32:41,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:32:41,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 15:32:41,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-05-03 15:32:41,285 INFO L87 Difference]: Start difference. First operand 10209 states and 43678 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:32:41,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:32:41,630 INFO L93 Difference]: Finished difference Result 19431 states and 81047 transitions. [2021-05-03 15:32:41,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 15:32:41,631 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 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 32 [2021-05-03 15:32:41,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:32:41,694 INFO L225 Difference]: With dead ends: 19431 [2021-05-03 15:32:41,694 INFO L226 Difference]: Without dead ends: 19035 [2021-05-03 15:32:41,695 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 98.1ms TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-05-03 15:32:41,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19035 states. [2021-05-03 15:32:42,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19035 to 13737. [2021-05-03 15:32:42,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13737 states, 13736 states have (on average 4.360439720442632) internal successors, (59895), 13736 states have internal predecessors, (59895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:32:42,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13737 states to 13737 states and 59895 transitions. [2021-05-03 15:32:42,376 INFO L78 Accepts]: Start accepts. Automaton has 13737 states and 59895 transitions. Word has length 32 [2021-05-03 15:32:42,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:32:42,376 INFO L480 AbstractCegarLoop]: Abstraction has 13737 states and 59895 transitions. [2021-05-03 15:32:42,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:32:42,376 INFO L276 IsEmpty]: Start isEmpty. Operand 13737 states and 59895 transitions. [2021-05-03 15:32:42,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-03 15:32:42,437 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:32:42,437 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1] [2021-05-03 15:32:42,652 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-03 15:32:42,653 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:32:42,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:32:42,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1698964616, now seen corresponding path program 8 times [2021-05-03 15:32:42,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:32:42,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102803397] [2021-05-03 15:32:42,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:32:42,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:32:42,717 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 15:32:42,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102803397] [2021-05-03 15:32:42,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834668832] [2021-05-03 15:32:42,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:32:42,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:32:42,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:32:42,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 15:32:42,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:32:42,893 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 15:32:42,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:32:42,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-05-03 15:32:42,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182033396] [2021-05-03 15:32:42,894 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 15:32:42,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:32:42,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 15:32:42,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-03 15:32:42,895 INFO L87 Difference]: Start difference. First operand 13737 states and 59895 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:32:43,425 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 15 [2021-05-03 15:32:44,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:32:44,386 INFO L93 Difference]: Finished difference Result 59639 states and 243328 transitions. [2021-05-03 15:32:44,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-03 15:32:44,386 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 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 32 [2021-05-03 15:32:44,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:32:44,712 INFO L225 Difference]: With dead ends: 59639 [2021-05-03 15:32:44,712 INFO L226 Difference]: Without dead ends: 58849 [2021-05-03 15:32:44,713 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 729.3ms TimeCoverageRelationStatistics Valid=406, Invalid=1234, Unknown=0, NotChecked=0, Total=1640 [2021-05-03 15:32:44,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58849 states. [2021-05-03 15:32:46,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58849 to 27180. [2021-05-03 15:32:46,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27180 states, 27179 states have (on average 4.433606828801648) internal successors, (120501), 27179 states have internal predecessors, (120501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:32:46,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27180 states to 27180 states and 120501 transitions. [2021-05-03 15:32:46,626 INFO L78 Accepts]: Start accepts. Automaton has 27180 states and 120501 transitions. Word has length 32 [2021-05-03 15:32:46,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:32:46,626 INFO L480 AbstractCegarLoop]: Abstraction has 27180 states and 120501 transitions. [2021-05-03 15:32:46,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:32:46,627 INFO L276 IsEmpty]: Start isEmpty. Operand 27180 states and 120501 transitions. [2021-05-03 15:32:46,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-03 15:32:46,723 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:32:46,723 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1] [2021-05-03 15:32:46,932 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:32:46,933 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:32:46,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:32:46,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1473506436, now seen corresponding path program 9 times [2021-05-03 15:32:46,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:32:46,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491933216] [2021-05-03 15:32:46,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:32:46,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:32:46,992 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 15:32:46,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491933216] [2021-05-03 15:32:46,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209193840] [2021-05-03 15:32:46,992 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:32:47,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 15:32:47,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:32:47,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 15:32:47,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:32:47,124 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 15:32:47,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:32:47,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2021-05-03 15:32:47,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017614826] [2021-05-03 15:32:47,126 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 15:32:47,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:32:47,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 15:32:47,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-05-03 15:32:47,127 INFO L87 Difference]: Start difference. First operand 27180 states and 120501 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:32:47,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:32:47,780 INFO L93 Difference]: Finished difference Result 31277 states and 134903 transitions. [2021-05-03 15:32:47,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 15:32:47,780 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 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 32 [2021-05-03 15:32:47,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:32:47,941 INFO L225 Difference]: With dead ends: 31277 [2021-05-03 15:32:47,941 INFO L226 Difference]: Without dead ends: 30802 [2021-05-03 15:32:47,941 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 82.6ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-05-03 15:32:47,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30802 states. [2021-05-03 15:32:48,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30802 to 25038. [2021-05-03 15:32:48,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25038 states, 25037 states have (on average 4.435155969165635) internal successors, (111043), 25037 states have internal predecessors, (111043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:32:49,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25038 states to 25038 states and 111043 transitions. [2021-05-03 15:32:49,126 INFO L78 Accepts]: Start accepts. Automaton has 25038 states and 111043 transitions. Word has length 32 [2021-05-03 15:32:49,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:32:49,126 INFO L480 AbstractCegarLoop]: Abstraction has 25038 states and 111043 transitions. [2021-05-03 15:32:49,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:32:49,127 INFO L276 IsEmpty]: Start isEmpty. Operand 25038 states and 111043 transitions. [2021-05-03 15:32:49,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-03 15:32:49,223 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:32:49,223 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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] [2021-05-03 15:32:49,423 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-03 15:32:49,424 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:32:49,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:32:49,424 INFO L82 PathProgramCache]: Analyzing trace with hash -963056650, now seen corresponding path program 10 times [2021-05-03 15:32:49,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:32:49,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616441519] [2021-05-03 15:32:49,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:32:49,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:32:49,475 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 15:32:49,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616441519] [2021-05-03 15:32:49,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952914118] [2021-05-03 15:32:49,476 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:32:49,505 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:32:49,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:32:49,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 15:32:49,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:32:49,601 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 15:32:49,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:32:49,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-05-03 15:32:49,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240895748] [2021-05-03 15:32:49,602 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 15:32:49,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:32:49,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 15:32:49,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-05-03 15:32:49,603 INFO L87 Difference]: Start difference. First operand 25038 states and 111043 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:32:50,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:32:50,941 INFO L93 Difference]: Finished difference Result 54817 states and 230789 transitions. [2021-05-03 15:32:50,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-03 15:32:50,942 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 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 34 [2021-05-03 15:32:50,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:32:51,221 INFO L225 Difference]: With dead ends: 54817 [2021-05-03 15:32:51,221 INFO L226 Difference]: Without dead ends: 53957 [2021-05-03 15:32:51,222 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 362.5ms TimeCoverageRelationStatistics Valid=322, Invalid=1238, Unknown=0, NotChecked=0, Total=1560 [2021-05-03 15:32:51,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53957 states. [2021-05-03 15:32:52,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53957 to 33088. [2021-05-03 15:32:52,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33088 states, 33087 states have (on average 4.473599903285278) internal successors, (148018), 33087 states have internal predecessors, (148018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:32:52,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33088 states to 33088 states and 148018 transitions. [2021-05-03 15:32:52,795 INFO L78 Accepts]: Start accepts. Automaton has 33088 states and 148018 transitions. Word has length 34 [2021-05-03 15:32:52,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:32:52,795 INFO L480 AbstractCegarLoop]: Abstraction has 33088 states and 148018 transitions. [2021-05-03 15:32:52,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:32:52,795 INFO L276 IsEmpty]: Start isEmpty. Operand 33088 states and 148018 transitions. [2021-05-03 15:32:52,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-03 15:32:52,936 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:32:52,936 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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] [2021-05-03 15:32:53,136 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:32:53,137 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:32:53,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:32:53,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1490817678, now seen corresponding path program 11 times [2021-05-03 15:32:53,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:32:53,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071919855] [2021-05-03 15:32:53,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:32:53,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:32:53,206 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-03 15:32:53,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071919855] [2021-05-03 15:32:53,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489939765] [2021-05-03 15:32:53,207 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:32:53,254 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 15:32:53,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:32:53,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 15:32:53,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:32:53,367 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 15:32:53,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:32:53,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-05-03 15:32:53,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711853019] [2021-05-03 15:32:53,368 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 15:32:53,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:32:53,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 15:32:53,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-03 15:32:53,369 INFO L87 Difference]: Start difference. First operand 33088 states and 148018 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:32:54,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:32:54,758 INFO L93 Difference]: Finished difference Result 59653 states and 250894 transitions. [2021-05-03 15:32:54,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-03 15:32:54,758 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-03 15:32:54,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:32:55,047 INFO L225 Difference]: With dead ends: 59653 [2021-05-03 15:32:55,048 INFO L226 Difference]: Without dead ends: 58480 [2021-05-03 15:32:55,048 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 432.2ms TimeCoverageRelationStatistics Valid=369, Invalid=1191, Unknown=0, NotChecked=0, Total=1560 [2021-05-03 15:32:55,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58480 states. [2021-05-03 15:32:56,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58480 to 38451. [2021-05-03 15:32:56,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38451 states, 38450 states have (on average 4.454200260078023) internal successors, (171264), 38450 states have internal predecessors, (171264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:32:57,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38451 states to 38451 states and 171264 transitions. [2021-05-03 15:32:57,040 INFO L78 Accepts]: Start accepts. Automaton has 38451 states and 171264 transitions. Word has length 34 [2021-05-03 15:32:57,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:32:57,040 INFO L480 AbstractCegarLoop]: Abstraction has 38451 states and 171264 transitions. [2021-05-03 15:32:57,040 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:32:57,040 INFO L276 IsEmpty]: Start isEmpty. Operand 38451 states and 171264 transitions. [2021-05-03 15:32:57,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 15:32:57,157 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:32:57,157 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:32:57,357 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:32:57,357 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:32:57,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:32:57,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1777521988, now seen corresponding path program 12 times [2021-05-03 15:32:57,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:32:57,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951287636] [2021-05-03 15:32:57,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:32:57,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:32:57,454 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-03 15:32:57,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951287636] [2021-05-03 15:32:57,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183409433] [2021-05-03 15:32:57,454 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:32:57,486 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 15:32:57,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:32:57,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 15:32:57,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:32:57,589 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-03 15:32:57,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:32:57,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2021-05-03 15:32:57,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999957798] [2021-05-03 15:32:57,592 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 15:32:57,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:32:57,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 15:32:57,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-03 15:32:57,594 INFO L87 Difference]: Start difference. First operand 38451 states and 171264 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:32:59,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:32:59,269 INFO L93 Difference]: Finished difference Result 101501 states and 447345 transitions. [2021-05-03 15:32:59,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 15:32:59,269 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 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 36 [2021-05-03 15:32:59,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:32:59,930 INFO L225 Difference]: With dead ends: 101501 [2021-05-03 15:32:59,930 INFO L226 Difference]: Without dead ends: 100925 [2021-05-03 15:32:59,930 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 241.7ms TimeCoverageRelationStatistics Valid=148, Invalid=404, Unknown=0, NotChecked=0, Total=552 [2021-05-03 15:33:00,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100925 states. [2021-05-03 15:33:02,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100925 to 64709. [2021-05-03 15:33:02,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64709 states, 64708 states have (on average 4.539284168881745) internal successors, (293728), 64708 states have internal predecessors, (293728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:33:03,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64709 states to 64709 states and 293728 transitions. [2021-05-03 15:33:03,037 INFO L78 Accepts]: Start accepts. Automaton has 64709 states and 293728 transitions. Word has length 36 [2021-05-03 15:33:03,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:33:03,037 INFO L480 AbstractCegarLoop]: Abstraction has 64709 states and 293728 transitions. [2021-05-03 15:33:03,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:33:03,037 INFO L276 IsEmpty]: Start isEmpty. Operand 64709 states and 293728 transitions. [2021-05-03 15:33:03,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 15:33:03,243 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:33:03,243 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:33:03,446 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-03 15:33:03,446 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:33:03,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:33:03,447 INFO L82 PathProgramCache]: Analyzing trace with hash -644790412, now seen corresponding path program 13 times [2021-05-03 15:33:03,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:33:03,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841958925] [2021-05-03 15:33:03,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:33:03,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:33:03,509 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 15:33:03,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841958925] [2021-05-03 15:33:03,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361195174] [2021-05-03 15:33:03,510 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:33:03,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:33:03,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 15:33:03,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:33:03,645 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 15:33:03,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:33:03,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-05-03 15:33:03,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515472956] [2021-05-03 15:33:03,646 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 15:33:03,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:33:03,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 15:33:03,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-03 15:33:03,647 INFO L87 Difference]: Start difference. First operand 64709 states and 293728 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:33:04,679 WARN L205 SmtUtils]: Spent 496.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2021-05-03 15:33:09,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:33:09,591 INFO L93 Difference]: Finished difference Result 345279 states and 1557613 transitions. [2021-05-03 15:33:09,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 15:33:09,592 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-03 15:33:09,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:33:12,986 INFO L225 Difference]: With dead ends: 345279 [2021-05-03 15:33:12,986 INFO L226 Difference]: Without dead ends: 340111 [2021-05-03 15:33:12,987 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 940.1ms TimeCoverageRelationStatistics Valid=365, Invalid=1117, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 15:33:13,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340111 states. [2021-05-03 15:33:23,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340111 to 209327. [2021-05-03 15:33:23,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209327 states, 209326 states have (on average 4.720412180044524) internal successors, (988105), 209326 states have internal predecessors, (988105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:33:26,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209327 states to 209327 states and 988105 transitions. [2021-05-03 15:33:26,465 INFO L78 Accepts]: Start accepts. Automaton has 209327 states and 988105 transitions. Word has length 36 [2021-05-03 15:33:26,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:33:26,465 INFO L480 AbstractCegarLoop]: Abstraction has 209327 states and 988105 transitions. [2021-05-03 15:33:26,465 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:33:26,465 INFO L276 IsEmpty]: Start isEmpty. Operand 209327 states and 988105 transitions. [2021-05-03 15:33:28,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-03 15:33:28,628 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:33:28,628 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:33:28,829 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:33:28,829 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:33:28,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:33:28,830 INFO L82 PathProgramCache]: Analyzing trace with hash -854765258, now seen corresponding path program 14 times [2021-05-03 15:33:28,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:33:28,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639872682] [2021-05-03 15:33:28,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:33:28,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:33:28,885 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 15:33:28,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639872682] [2021-05-03 15:33:28,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172911940] [2021-05-03 15:33:28,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:33:28,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:33:28,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:33:28,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 15:33:28,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:33:29,029 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 15:33:29,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:33:29,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-05-03 15:33:29,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557361258] [2021-05-03 15:33:29,030 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 15:33:29,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:33:29,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 15:33:29,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-05-03 15:33:29,031 INFO L87 Difference]: Start difference. First operand 209327 states and 988105 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:33:32,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:33:32,398 INFO L93 Difference]: Finished difference Result 231776 states and 1069827 transitions. [2021-05-03 15:33:32,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 15:33:32,399 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-03 15:33:32,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:33:34,796 INFO L225 Difference]: With dead ends: 231776 [2021-05-03 15:33:34,796 INFO L226 Difference]: Without dead ends: 229312 [2021-05-03 15:33:34,797 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 110.4ms TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-05-03 15:33:35,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229312 states. [2021-05-03 15:33:42,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229312 to 204036. [2021-05-03 15:33:43,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204036 states, 204035 states have (on average 4.715220427867767) internal successors, (962070), 204035 states have internal predecessors, (962070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:33:46,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204036 states to 204036 states and 962070 transitions. [2021-05-03 15:33:46,119 INFO L78 Accepts]: Start accepts. Automaton has 204036 states and 962070 transitions. Word has length 36 [2021-05-03 15:33:46,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:33:46,119 INFO L480 AbstractCegarLoop]: Abstraction has 204036 states and 962070 transitions. [2021-05-03 15:33:46,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:33:46,119 INFO L276 IsEmpty]: Start isEmpty. Operand 204036 states and 962070 transitions. [2021-05-03 15:33:46,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-03 15:33:46,970 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:33:46,971 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:33:47,171 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-03 15:33:47,172 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:33:47,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:33:47,172 INFO L82 PathProgramCache]: Analyzing trace with hash -54932290, now seen corresponding path program 15 times [2021-05-03 15:33:47,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:33:47,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106071507] [2021-05-03 15:33:47,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:33:47,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:33:47,273 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 15:33:47,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106071507] [2021-05-03 15:33:47,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577337714] [2021-05-03 15:33:47,274 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:33:47,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 15:33:47,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:33:47,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-03 15:33:47,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:33:47,427 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 15:33:47,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:33:47,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-05-03 15:33:47,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660442129] [2021-05-03 15:33:47,428 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 15:33:47,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:33:47,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 15:33:47,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-03 15:33:47,429 INFO L87 Difference]: Start difference. First operand 204036 states and 962070 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:33:55,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:33:55,923 INFO L93 Difference]: Finished difference Result 502202 states and 2377356 transitions. [2021-05-03 15:33:55,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 15:33:55,924 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-05-03 15:33:55,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:34:00,998 INFO L225 Difference]: With dead ends: 502202 [2021-05-03 15:34:00,999 INFO L226 Difference]: Without dead ends: 498334 [2021-05-03 15:34:00,999 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 92.5ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-03 15:34:02,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498334 states. [2021-05-03 15:34:19,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498334 to 386864. [2021-05-03 15:34:21,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386864 states, 386863 states have (on average 4.774356813652378) internal successors, (1847022), 386863 states have internal predecessors, (1847022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:34:29,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386864 states to 386864 states and 1847022 transitions. [2021-05-03 15:34:29,492 INFO L78 Accepts]: Start accepts. Automaton has 386864 states and 1847022 transitions. Word has length 38 [2021-05-03 15:34:29,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:34:29,492 INFO L480 AbstractCegarLoop]: Abstraction has 386864 states and 1847022 transitions. [2021-05-03 15:34:29,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:34:29,492 INFO L276 IsEmpty]: Start isEmpty. Operand 386864 states and 1847022 transitions. [2021-05-03 15:34:32,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-03 15:34:32,977 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:34:32,977 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:34:33,204 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-03 15:34:33,205 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:34:33,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:34:33,206 INFO L82 PathProgramCache]: Analyzing trace with hash -2092943236, now seen corresponding path program 16 times [2021-05-03 15:34:33,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:34:33,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487452387] [2021-05-03 15:34:33,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:34:33,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:34:33,384 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-03 15:34:33,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487452387] [2021-05-03 15:34:33,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671291480] [2021-05-03 15:34:33,385 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:34:33,443 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:34:33,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:34:33,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 15:34:33,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:34:34,601 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-03 15:34:34,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:34:34,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-05-03 15:34:34,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199714297] [2021-05-03 15:34:34,602 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 15:34:34,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:34:34,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 15:34:34,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-05-03 15:34:34,603 INFO L87 Difference]: Start difference. First operand 386864 states and 1847022 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:34:55,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:34:55,480 INFO L93 Difference]: Finished difference Result 1120732 states and 5108769 transitions. [2021-05-03 15:34:55,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 15:34:55,481 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 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 40 [2021-05-03 15:34:55,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:35:06,668 INFO L225 Difference]: With dead ends: 1120732 [2021-05-03 15:35:06,669 INFO L226 Difference]: Without dead ends: 1114512 [2021-05-03 15:35:06,669 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 1382.1ms TimeCoverageRelationStatistics Valid=270, Invalid=722, Unknown=0, NotChecked=0, Total=992 [2021-05-03 15:35:10,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114512 states. [2021-05-03 15:35:45,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114512 to 448533. [2021-05-03 15:35:47,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448533 states, 448532 states have (on average 4.7567286169102765) internal successors, (2133545), 448532 states have internal predecessors, (2133545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:35:57,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448533 states to 448533 states and 2133545 transitions. [2021-05-03 15:35:57,733 INFO L78 Accepts]: Start accepts. Automaton has 448533 states and 2133545 transitions. Word has length 40 [2021-05-03 15:35:57,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:35:57,734 INFO L480 AbstractCegarLoop]: Abstraction has 448533 states and 2133545 transitions. [2021-05-03 15:35:57,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:35:57,734 INFO L276 IsEmpty]: Start isEmpty. Operand 448533 states and 2133545 transitions. [2021-05-03 15:36:03,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-03 15:36:03,669 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:36:03,669 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:36:03,869 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:36:03,870 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:36:03,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:36:03,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1027138496, now seen corresponding path program 17 times [2021-05-03 15:36:03,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:36:03,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474586985] [2021-05-03 15:36:03,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:36:03,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:36:04,023 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-03 15:36:04,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474586985] [2021-05-03 15:36:04,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13142332] [2021-05-03 15:36:04,024 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:36:04,075 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 15:36:04,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:36:04,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 15:36:04,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:36:04,298 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-03 15:36:04,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:36:04,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-05-03 15:36:04,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514756244] [2021-05-03 15:36:04,301 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 15:36:04,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:36:04,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 15:36:04,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-05-03 15:36:04,303 INFO L87 Difference]: Start difference. First operand 448533 states and 2133545 transitions. Second operand has 16 states, 16 states have (on average 4.1875) internal successors, (67), 15 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:36:40,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:36:40,418 INFO L93 Difference]: Finished difference Result 1565237 states and 7251935 transitions. [2021-05-03 15:36:40,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-05-03 15:36:40,419 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 15 states have internal predecessors, (67), 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 40 [2021-05-03 15:36:40,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:36:58,099 INFO L225 Difference]: With dead ends: 1565237 [2021-05-03 15:36:58,099 INFO L226 Difference]: Without dead ends: 1521056 [2021-05-03 15:36:58,101 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2033 ImplicationChecksByTransitivity, 1144.7ms TimeCoverageRelationStatistics Valid=1278, Invalid=4574, Unknown=0, NotChecked=0, Total=5852 [2021-05-03 15:37:01,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1521056 states. [2021-05-03 15:37:48,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1521056 to 810028. [2021-05-03 15:37:51,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810028 states, 810027 states have (on average 4.736152004809716) internal successors, (3836411), 810027 states have internal predecessors, (3836411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:38:05,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810028 states to 810028 states and 3836411 transitions. [2021-05-03 15:38:05,096 INFO L78 Accepts]: Start accepts. Automaton has 810028 states and 3836411 transitions. Word has length 40 [2021-05-03 15:38:05,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:38:05,097 INFO L480 AbstractCegarLoop]: Abstraction has 810028 states and 3836411 transitions. [2021-05-03 15:38:05,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 15 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:38:05,097 INFO L276 IsEmpty]: Start isEmpty. Operand 810028 states and 3836411 transitions. [2021-05-03 15:38:12,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-03 15:38:12,031 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:38:12,032 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:38:12,232 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-03 15:38:12,232 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:38:12,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:38:12,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1485289540, now seen corresponding path program 18 times [2021-05-03 15:38:12,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:38:12,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853905948] [2021-05-03 15:38:12,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:38:12,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:38:12,337 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-03 15:38:12,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853905948] [2021-05-03 15:38:12,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094705873] [2021-05-03 15:38:12,338 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:38:12,395 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 15:38:12,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:38:12,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 15:38:12,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:38:13,508 WARN L205 SmtUtils]: Spent 1.02 s on a formula simplification that was a NOOP. DAG size: 9 [2021-05-03 15:38:13,615 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-03 15:38:13,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:38:13,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-05-03 15:38:13,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094504029] [2021-05-03 15:38:13,616 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 15:38:13,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:38:13,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 15:38:13,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-03 15:38:13,619 INFO L87 Difference]: Start difference. First operand 810028 states and 3836411 transitions. Second operand has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 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)